PDF malware analysis — malicious · 9508ac623e2481cf

MALICIOUS

PDF

12.2 KB

MD5: 3060e4f413f19b33126abebfb1583bef SHA-1: fa3a4f1b1cea9ecc96efa5d34605814d29758f26 SHA-256: 9508ac623e2481cfd552acc4abb7d910a041aceab00792465afa0d2e03c2a059

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.001 Malicious Link/Object

The critical heuristic CVE_2007_5659 indicates the exploitation of a known vulnerability in Adobe Reader via embedded JavaScript. The presence of deobfuscated JavaScript streams, named legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, suggests that the script is designed to download and execute a secondary payload. The ClamAV detection further supports the malicious nature of the file.

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: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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` `6f60a1053baafdc578f85eae84a2dc6d16775fbd66240d82cbfb7b4f4ff4e90a`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	295 bytes
`legacy_pdfkit_stage_000.js` `fec62085fb2ac5b97852624159d9a6cd3f68c5e31f69c1587053c5146fe85876`	deobfuscated-js	z-percent hex-pair decoded JavaScript at offset 0x2E9	5184 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `2857be92bc39c140921d6075caee79e66ab5981e5b7a0e6205e7ba52c3198287`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2E9	12333 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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