Pdf.Dropper.Agent PDF malware analysis — malicious · c5d29cfaced9e12f

MALICIOUS

PDF

1.95 MB Created: 2008-08-02 11:25:13 +04:00 Authoring application: PScript5.dll Version 5.2 (via Acrobat Distiller 6.0 (Windows))

MD5: 56a6157b57a84c6bcd15668b5650c424 SHA-1: bdfe353727b831185613c9c0a72cda763ae72228 SHA-256: c5d29cfaced9e12fea3a0e18430d4b77c3abd7195571f769ee8175fd2c3fa419

316 Risk Score

Malware Insights

Pdf.Dropper.Agent · confidence 95%

MITRE ATT&CK

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

This PDF file is identified as malicious by ClamAV (Pdf.Dropper.Agent-7301371-0). It contains embedded JavaScript and an OpenAction trigger, indicating an attempt to automatically execute code upon opening. The critical CVE-2007-5659 heuristic firing suggests exploitation of a known PDF vulnerability (Collab.collectEmailInfo) to likely download and execute a second-stage payload. A secondary embedded PDF with similar suspicious findings was also detected.

Heuristics 9

Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659

PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (matched in decompressed stream)
Secondary embedded PDF body has suspicious static findings critical POLYGLOT_CHILD_PDF_STATIC_TRIAGE

A valid PDF body was found at a nonzero offset inside another container and its carved contents matched PDF exploit or lure heuristics. This catches polyglots where the top-level magic routes to ZIP/OLE while a PDF reader or downstream parser opens the hidden PDF payload.
ClamAV: Pdf.Dropper.Agent-7301371-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7301371-0
OpenAction trigger high PDF_OPENACTION

PDF has an /OpenAction — code runs automatically when opened
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
Suspicious extracted artifact high 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.
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 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/iX/1.0/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://purl.org/dc/elements/1.1/

Extracted artifacts 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0001_000.js` `54b823c66bf0cdbeec11eb9e7f3eb04d02db004cb286b08c78209b92f9b09d9a`	pdf-javascript-stream	PDF /JS object 1 at offset 0xF	37 bytes
`javascript_obj0013_001.js` `e1c735ec368f7648d6351708dcfeaf9261abc0c0eef43cc7111d392f17623088`	pdf-javascript-stream	PDF /JS object 13 at offset 0x361	17136 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 long base64-like blob(s).
`javascript_obj0016_002.js` `a57b424ce100da4aa84ee81f8350f9368c263ade7ac2d448f11e0ca1c028ff4a`	pdf-javascript-stream	PDF /JS object 16 at offset 0x26C7	5110 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 16 eval/decoder/string-building token(s).
`stream_005_off00004597.js` `b5ba09264c453e6ea26221c74b8d20dbda7e6d374cf193467b0164fbf0f558e4`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4597	5098 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 16 eval/decoder/string-building token(s).
`polyglot_child_pdf_off0000228a.pdf` `7f05473b42a93bc18da3906ba379689ae8a41fd58c2b2ee961b699f419f68a87`	polyglot-child-pdf	Secondary PDF body inside pdf container at offset 0x228A	2039158 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 long base64-like blob(s).

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