PDF malware analysis — malicious · a4ac73a6efee530a

MALICIOUS

PDF

7.9 KB

MD5: c1a687eef315ebfd48935e77af3ee522 SHA-1: a49a722ef824dd9fd8d8cc72774035e6548d2715 SHA-256: a4ac73a6efee530a05ea05eeeaa3d8efc137e4eb3bcf4d492c2b318264da2f77

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious Link/URL T1055.001 Process Injection

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. A critical heuristic identified the use of CVE-2007-5659 (Collab.collectEmailInfo), a known vulnerability in older Adobe Reader versions. This suggests the document is designed to exploit this vulnerability to run arbitrary code, likely to download and execute a secondary payload. The presence of an obfuscated JavaScript stream further supports this. No specific family could be identified.

Heuristics 6

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)
ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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.
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `4d6fe064adeaedf3fdd5d40f64a8f0545fc596e16f39bdbe17a9ddf9bdf0c8f6`	pdf-javascript-stream	PDF /JS object 6 at offset 0x1A5	6655 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 2 long base64-like blob(s).

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