PDF malware analysis — malicious · 4a73243928c7fe3e

MALICIOUS

PDF

12.1 KB

MD5: a8864c84893b8a244ead64512cd4eeaf SHA-1: 6329b56cffcc3a7d0f262726c2b9fa894f1e2923 SHA-256: 4a73243928c7fe3eb579a7cf146f3aaf27ac6dd090e54b0a59262bde1c582674

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2007_5659 heuristic indicates the exploitation of a known vulnerability using the Collab.collectEmailInfo method to execute JavaScript. This script is likely designed to download and execute a second-stage payload, as suggested by the extracted JavaScript files and the ClamAV detection of Pdf.Exploit.Agent-36065. The document body was unreadable, preventing a more specific assessment of the lure.

Heuristics 5

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. (identified after JavaScript deobfuscation)
ClamAV: Pdf.Exploit.Agent-36065 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36065
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `9c67560e8c63b720885d3efc1627b844b86a6ec08e99e5b65a22eae832045756`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19C	431 bytes
`legacy_pdfkit_stage_000.js` `7bff96fc686c53ade848730b79a5159cf4e523f8a79fc371f38e01993da828c7`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12347 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `9e6c22ef8cd7524d590a920bf9a2dca5c9d6b9668678b4659b3cd1374b56c7fa`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5125 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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