PDF malware analysis — malicious · 42d7bd66b30184e5

MALICIOUS

PDF

13.1 KB

MD5: af8aa72f8f96518a90da525cbd89e6f6 SHA-1: 8b2de2c2b5327bfcaf8d8a6103136e69c1f28f72 SHA-256: 42d7bd66b30184e54d854e2cf9f9137cb3771fe532c4719bc360863c7d4d0d58

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The file is a PDF containing embedded JavaScript, identified by multiple heuristics including CVE-2007-5659. The critical heuristic indicates the exploitation of a known vulnerability (CVE-2007-5659) via the `Collab.collectEmailInfo` JavaScript function. The PDF launcher concatenates info fields, extracts characters at a fixed stride, and evaluates the result. This process likely leads to the execution of a malicious payload. The presence of deobfuscated JavaScript files suggests further malicious activity, such as downloading additional malware.

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` `5fe1c58feecc9bfbc2d150e9e83b2e139ccd5b5a7e1ab983cba0c86390aa667f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12649 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `7192d00054ac18647c1808eec7a9f401131748858dd773190f4635df7ba71774`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5303 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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