PDF malware analysis — malicious · 87abb460b933158d

MALICIOUS

PDF

684.2 KB Authoring application: Adobe Illustrator 11.0

MD5: 1f30c45e5c5c8b9f8778c10fff35d91d SHA-1: 6d8dc10ee9d94a4d0336c3e5c453cd2ff576745f SHA-256: 87abb460b933158d3469827c8efde33cc01e3047781b626eff9cf54dc1c88698

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains multiple embedded JavaScript streams, with several triggering high-severity heuristics for eval() and unescape() calls, indicating obfuscated code execution. A specific heuristic also flags potential exploitation of U3D/3D content in PDFs, commonly associated with CVE-related vulnerabilities. The embedded JavaScript streams are likely responsible for downloading and executing a second-stage payload, though their exact functionality is obscured by heavy obfuscation. The presence of numerous decompressed JS streams suggests a complex, multi-stage attack.

Heuristics 9

U3D/3D content in PDF — Adobe Reader 3D parser CVE-family indicator high CVE related PDF_U3D_CVE_RELATED

PDF contains U3D (Universal 3D) or 3D annotation content — CVE-2011-2462 and CVE-2009-3953 are critical vulnerabilities in Adobe Reader's U3D processing that allow arbitrary code execution. U3D content in PDFs is extremely rare in normal documents.
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD

PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules. (matched inside decoded stream)
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules. (matched inside decoded stream)
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/g/img/
- http://ns.adobe.com/xap/1.0/mm/
- http://purl.org/dc/elements/1.1/

Extracted artifacts 29

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_053_off0005bd46.js` `d9a00bae7f9b4a73d28810c0596afc4684ed9b978ed91afc480c36218b32340d`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5BD46	28204 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`stream_054_off0005d1af.js` `acd6244460873bfdf8c84155b55e9873f457aed088cf4e27f87aa67a1a5f0137`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5D1AF	23881 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`stream_055_off0005e348.js` `a6ad86a483aebeef23a7a78a561460281eaa4044d00d1444d58691b626f4b0b8`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5E348	7720 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).
`stream_056_off0005ebd8.js` `c37678945a32ddd6d14330812f6555e409e97a7d6be74c29298245d527cea542`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5EBD8	7131 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).
`stream_057_off0005f393.js` `cb36499b7c0a124d929629c2cc1bff04fb13abc77a80ad168c858bf459b6220f`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5F393	18421 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 10 eval/decoder/string-building token(s).
`stream_058_off00060516.js` `60f7dc10ce4582ab06e8dba17c351f255e7f4e9909d88d50ec31213cdf9b6be0`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x60516	12428 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`stream_059_off0006101d.js` `1c80b1fcfa1a882440def46b1e6406af32dd4a56499b144c09c13572bed8879c`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x6101D	5368 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`stream_060_off0006161f.js` `af85a00d5afdac67c61116cfb59f33c5720abbdd7dab1e81ecd6278b0ca3ff7f`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x6161F	26144 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 11 eval/decoder/string-building token(s).
`stream_061_off00062b13.js` `70e19c3af78739072cf0c51dfe5e6d2d74ba439663b3b3757c66446c7ef081d2`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x62B13	8402 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`stream_062_off0006334a.js` `ec51594e4b6802de4c6d4cb9a3c0b77804bd8b541ea779adadc994ae123b0501`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x6334A	12178 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).
`stream_063_off00063d67.js` `6caa7dd98eb42d21b7ee6ae5fc317a8bfdb2e8983d02710a0b5928bc4c878992`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x63D67	1632 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).
`stream_072_off0006958a.js` `20813868ff5924a446b9a1ca93a0f8ca1937ae3a86932db3b02a61aed190f58f`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x6958A	56410 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 14 eval/decoder/string-building token(s).
`stream_073_off0006be11.js` `4d7c4e5dc99001e77d0dea36f8cb3703c863ddc6ad281286d72a2f41f59ae98b`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x6BE11	44812 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`stream_074_off0006dcbb.js` `e2290a81b586bac2c892ba2299416d09668e12e9e0e98958692a38354c69721d`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x6DCBB	9013 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`stream_075_off0006e4b0.js` `acdd026b272c4fcf9dcbfa94681436b9c70cf2805369bdb363ed10c3e4161b75`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x6E4B0	1796 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).
`stream_076_off0006e7fd.js` `1c2f8fa58b8f5992b85b8bcec7fcdca2948e972bc8a7c32103c96cc2690ff776`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x6E7FD	17888 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`stream_077_off0006f68a.js` `265a639a8cbe3cfd38ecad67b2efc469e897aa02dfacdb3d3084587b464cb618`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x6F68A	17210 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`stream_078_off00070431.js` `c0ea2ae0aa0256cb6262856194675d8f3506242b0c10dad1b02c3d058de4a98a`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x70431	38073 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 16 eval/decoder/string-building token(s).
`stream_079_off00072175.js` `4c00428ae36f5ca7a5c5c499a71c521009015460210cae87312362c2443321da`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x72175	29588 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s).
`stream_080_off000736a0.js` `cdf52350da1741bfffa96552d7abc9b2fa3ed2fcd7f6dbba6eeb747d9bd5d07a`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x736A0	5859 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).
`stream_081_off00073ce8.js` `37f8a07e2b4ad30ea896a939ff158bfa56c47ebf7db14a1e7960aae4569b20f5`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x73CE8	1912 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s).
`stream_082_off00074073.bin` `87ac3af9f6ee33b427fd2e183b4f51cad816f65bb8e2e977c381c28472242a7d`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x74073	62944 bytes
`stream_083_off00080b95.js` `56a87f97b6e3bf1e6e8117231ee9e5b443ae3563a67d5ebe2ae7fa55468302b6`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x80B95	184355 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`stream_084_off0008b8de.js` `13f4124805789ce9f20546cb787be547c408a1be7160250c99d9d3343540f229`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x8B8DE	271969 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).
`objstm_0072_00.bin` `e92a33c102d9adb3546cc31fe38a2be37e16097003a39d1d137393aa29d22001`	pdf-objstm-decoded	PDF /ObjStm 72 0 obj (inflated)	15160 bytes
`objstm_0073_00.bin` `ac2c7b85e0bb2cf16ef50c3c7a9ad3221501a1fed1dba3c41310c76919d787e9`	pdf-objstm-decoded	PDF /ObjStm 73 0 obj (inflated)	5699 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 long base64-like blob(s).
`font_00_sfnt_off00000b1a.bin` `d6c87a9ca199ae8ba090d0572b93dd998834c9c653719de43d2ecc5b209048e7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB1A	80690 bytes
`font_01_cff_off000101a1.bin` `ff2bd39b1311329d9bedf20dcc32a5c5691647192c7f1c6f455126503a909ee9`	pdf-font-stream	PDF embedded font (cff) at offset 0x101A1	1558 bytes
`font_02_sfnt_off00034700.bin` `f39f99e2d4b021d4eac703afe26d32ad26f128c442f2089910c21b1f323fc85d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x34700	79301 bytes

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