PDF malware analysis — malicious · 3e7b0cec6a5d1931

MALICIOUS

PDF

768.7 KB Created: 2009-09-14 13:21:22 +02:00 Authoring application: Adobe PDF Library 8.0

MD5: 4e97dc417c3ed7201f66682b6709c7a5 SHA-1: 32cbbb35a526384d6d143ca6bb4f95741f756615 SHA-256: 3e7b0cec6a5d1931f4b3a46072fb65564b3aa79b8e5f05f4b8b5328d1adb4ee6

122 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1566.002 Spearphishing Attachment

This PDF document contains multiple JavaScript streams, with one stream exhibiting an eval() call, indicating code execution. The presence of embedded files and a high stream count suggests obfuscation and a complex payload delivery mechanism. The JavaScript is likely used to download and execute a second-stage payload, which is a common technique for malware distribution via PDFs. The specific JavaScript files extracted are considered IOCs.

Heuristics 10

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (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.
Unusually high stream count medium PDF_MANY_STREAMS

PDF contains 501+ stream objects — may indicate heap spray or heavy obfuscation
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.
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.
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
AcroForm button with action trigger low PDF_ACROFORM_BUTTON

PDF contains a /Btn form field together with a SubmitForm/URI/Launch/JS trigger — this is the building block of fake 'Download' or 'Open' button overlays used in PDF phishing lures
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 https://www.adobe.com\
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://www.adobe.com/products/acrobat/readstep2.html.)Tj
- http://www.adobe.com/support\
- http://crl.adobe.com/prodSvce.crl0
- http://crl.adobe.com/cds.crl0��~�|�z0x1

Extracted artifacts 12

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj1552.bin` `f68451ab93012b047ce4dd7bb71ff312ed193b80738b3da360a8e25634a78d30`	pdf-embedded-file	PDF EmbeddedFile object 1552 at offset 0x27BCA	32513 bytes
`embedded_file_obj1553.bin` `c06dcd026a7ea0536b63e07ce688691b585339a3ab7ff59065e546b56308c7bb`	pdf-embedded-file	PDF EmbeddedFile object 1553 at offset 0x2861D	85 bytes
`embedded_file_obj1554.bin` `e475f9760af73935e4d32f822a8e560794bd954bcfc6182dab079f0c18465a48`	pdf-embedded-file	PDF EmbeddedFile object 1554 at offset 0x286D2	40933 bytes
`embedded_file_obj1641.bin` `f61165c9bc5b0b07de910fbd045fc5802433e10d1d08a949be8d981ef0e96f7c`	pdf-embedded-file	PDF EmbeddedFile object 1641 at offset 0x2CB51	21102 bytes
`embedded_file_obj13871.bin` `229c36f7e596d13fef076a38464e1f43de618ee593552bd24f36de5512ac39aa`	pdf-embedded-file	PDF EmbeddedFile object 13871 at offset 0xBC7F0	44121 bytes
`javascript_obj1518_000.js` `4a1aca004cf20431c9a66dce85404a6411a54d881a6c257882260ffc972a13eb`	pdf-javascript-stream	PDF /JS object 1518 at offset 0x2E2E	870 bytes
`javascript_obj1520_001.js` `922f7942d25f53e6e6eedc1b3a95c47a757faab3be4838fa02db0dbea2c4dbcc`	pdf-javascript-stream	PDF /JS object 1520 at offset 0x2FB9	2798 bytes
`javascript_obj1522_002.js` `04ceb4c2218e7db19a6e007ca4ce846f92c17fff5eaf3a611e71bbd7a5726917`	pdf-javascript-stream	PDF /JS object 1522 at offset 0x32B3	1535 bytes
`stream_004_off000035bd.bin` `bec6159663596fab9cbb35c31d8a1164f7678df36df09e813af56a0a389fc3e6`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x35BD	1897 bytes
`stream_005_off000038c6.js` `53defa33f29f9b7090a42fae828c591759c2cf2cc75fdc38f0e270fc50b90fe4`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x38C6	720911 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 17 eval/decoder/string-building token(s).
`stream_006_off000276e0.bin` `f64a0cc3286bcb96b7dbeb0685d83beebbf32c5562495b959ae8bab037be067d`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x276E0	4753 bytes
`stream_007_off00027aa6.bin` `0e129c8d682fc497091c09841e1166d19dbf17aee25d8aed75f47400eeb5123a`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x27AA6	322 bytes

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