PDF malware analysis — malicious · d0b0780cb055e2cf

MALICIOUS

PDF

1.39 MB

MD5: e2362bd9fda2d68118b18f3a24e24c77 SHA-1: f04f490e1d6a55181366b9cdf203f08b339cc28f SHA-256: d0b0780cb055e2cf2f39a8b66e26810bc31942fd7b807f6382ff70ccc628cbac

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains multiple embedded JavaScript streams, with one particularly large stream exhibiting eval() calls and prototype pollution patterns. This suggests the script is designed to de-obfuscate and execute malicious code. The presence of XFA forms and embedded scripts points towards a delivery mechanism for a secondary payload, though the exact nature of the payload cannot be determined from the static analysis alone. No specific IOCs like URLs or hashes were extracted from the script content.

Machine Learning

Nyx PDF Classifier suspicious score 0.3093

Heuristics 8

Prototype-pollution JavaScript pattern high CVE related PDF_JS_PROTOTYPE_POLLUTION

PDF JavaScript mutates object prototypes while also referencing privileged or sensitive PDF APIs. This tracks a modern PDF exploit technique family without assigning an unverified CVE.
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.
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
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)
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/xap/1.0/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/mm/
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/xfa/promoted-desc/

Extracted artifacts 19

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_002_off0000034e.js` `f8721569904600df33f536ddc9f4942717077f9d6c3c4253a8f4de5650fc6531`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x34E	1367 bytes
`stream_003_off00000534.js` `91ea259764c68d27b8981a339c02d8ea92224ae5c0d0cd0a7c8f3d645d599090`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x534	902 bytes
`stream_008_off00000e6b.js` `6e568a1338babb171f964d835d60a1f5c1d9527ce6987e21aca56a3e3e4b9cc0`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xE6B	2423 bytes
`stream_009_off00001239.js` `49fbb9f080ff25fd35b7d18defa8b4d883eb91f369cb60256610528f5be308f8`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x1239	1019156 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s). Carved artifact contains 4 long base64-like blob(s).
`stream_010_off00036f05.bin` `b16a77f36a1dbb10b68158d5bc3bc5894c1696984d4fcfb18db002aa5ca6cb65`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x36F05	5711 bytes
`stream_011_off0003737d.bin` `cac9c34aeab80f505296f22cac62dc239a5cea1ffae6361d1991c279d415fadb`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3737D	47559 bytes
`stream_012_off0003833f.bin` `8ed9cdaaef2aa769579a4ba835e39256b1c3971f55aa85f7b7c268d675cc53f7`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3833F	8178 bytes
`stream_013_off00038a98.bin` `82883b1c356644ec1217b1e20b594e85f02d0657b4324c7bfe032e52e5e13b8e`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x38A98	374 bytes
`stream_015_off0003aa7e.bin` `04d0c9976d81c8ac08186397a6e1b0eda7a6896713d9d7591343b1b07999ec47`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3AA7E	895200 bytes
`stream_023_off0008cfdb.bin` `b2a50460b1fc66b7680230c728241859435e1af538bd15e880282e123198de62`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x8CFDB	102219 bytes
`stream_024_off0009e950.bin` `f13c106e4ee427254e92d68485d1420403c9e874eee0f33787ff10fe62f8018f`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x9E950	188972 bytes
`stream_025_off000be59b.bin` `55cb4b903a99e15bba7a1da6ca466776cafcadab161604e20e685e4472952dcf`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xBE59B	196605 bytes
`stream_026_off000df735.bin` `b8e2518b116c26bab0e9f8c1672daf405dedad561157502b657e9005be2029aa`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xDF735	367087 bytes
`stream_028_off00130dd2.bin` `1e8564d3d89047875dccaa98279599de9d7ddf77240906041f1156ba8edf3315`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x130DD2	352198 bytes
`objstm_0067_00.bin` `fe1b0511b757619b151d5ed2d12acf276d811f46e18d3442c1f9a1daec32b1e0`	pdf-objstm-decoded	PDF /ObjStm 67 0 obj (inflated)	807 bytes
`font_00_sfnt_off0004990d.bin` `c29e5b1537bee8c88b3ffca56c5f24a45ec8da374cf9d4c0b4a78d04fc230949`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4990D	95975 bytes
`font_01_sfnt_off00059bf2.bin` `4f8a962143becce891b0f8d40b5315e54e2a298ba661302850ebd34e48af909a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x59BF2	99778 bytes
`font_02_sfnt_off0006aead.bin` `b1260c85fef77007b5f19c1c6f3552e1c6ade6c959082cf86dd6971951ed119c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6AEAD	102071 bytes
`font_03_sfnt_off0007c8c5.bin` `926d8eb5abd4c74e46a419aaf25a490564d389c7a250d2392b198a342df65b8a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7C8C5	97320 bytes

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