PDF malware analysis — malicious · 2c26310969734809

MALICIOUS

PDF

12.9 KB

MD5: fb479a10907bb791e76a4a6bf388d399 SHA-1: 25adea21e86079b074999a240307e38043e0f0d9 SHA-256: 2c263109697348094f1767bd49af97a6735ec8b9d6635e455dcea87b0f958d0b

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious File

The file is a PDF containing embedded JavaScript, which is flagged as malicious by ClamAV (Pdf.Exploit.Agent-36062). The critical heuristic CVE_2007_5659 indicates the JavaScript is designed to exploit a known vulnerability (Collab.collectEmailInfo) by concatenating and evaluating info fields. Two deobfuscated JavaScript files were extracted, suggesting a multi-stage execution process likely aimed at downloading and running further malicious content.

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-36062 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36062
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` `068944f8c011a88ab770b45c6de142b9305a1f515d410204d5eadd9ac2b5bfb3`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19B	373 bytes
`legacy_pdfkit_stage_000.js` `e2a6caf62c51aa3750f44435bfa2dab445b94995ee900e5d45b1829616470b77`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12500 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `c046edaa78559aeb107399e70fc52bbf5b15740d3abac4e7953bdfa03dc289ad`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5196 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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