PDF malware analysis — malicious · 9307a12b308469b6

MALICIOUS

PDF

9.6 KB

MD5: 2a679296b0564ed0bd3bdd54f1b3d0a1 SHA-1: 44c785ce834ce48770dcfbb337a1a475145d789c SHA-256: 9307a12b308469b69315ce325db1439200e6e063219c0ede89fee8a33115adb0

180 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1566.002 Spearphishing Attachment

The file is a PDF containing embedded JavaScript, which is a common technique for exploiting vulnerabilities. The critical heuristic 'CVE_2007_5659: Collab.collectEmailInfo' indicates exploitation of a known PDF vulnerability. The ClamAV detection 'Pdf.Exploit.Agent-35905' further confirms its malicious nature. The embedded JavaScript is likely designed to download and execute a secondary payload, although the exact mechanism is obfuscated.

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. (identified after JavaScript deobfuscation)
ClamAV: Pdf.Exploit.Agent-35905 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35905
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `d8a6b4ad1abf04d0c4a4f89535cfb57f7312edef25c443f4e844c8ec9d0929dd`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19B	352 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `437e545b55b6248528a459d4cda68475281d84f3be9911b94844e16f2332325a`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	12519 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `575221845f24376d8ba4a28d00662aae11e20cf8a12f72bc7266d601928fcd31`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	5141 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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