PDF malware analysis — malicious · d5d5a5185249788f

MALICIOUS

PDF

12.2 KB

MD5: 5866cffe74b84332e99171ed841d6ddd SHA-1: 063f5ba69d02f5107913a66dc20e0bcc0f3776e5 SHA-256: d5d5a5185249788fa50e1361b1c9a3db967d4e111bc73dc16e2038d22fa82d80

146 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell

The PDF file contains embedded JavaScript that exploits CVE-2007-5659, specifically targeting the 'collab.collectEmailInfo' function. The heuristics indicate that this JavaScript is responsible for decoding and executing a malicious payload. The presence of multiple extracted JavaScript files, including 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js', suggests a multi-stage attack designed to download and run further malicious code. The ClamAV detection further confirms the malicious nature of the file.

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-35903 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35903
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.
syncAnnotScan annotation-staging primitive low PDF_FOXIT_SYNCANNOTSCAN

PDF JavaScript calls syncAnnotScan() — a no-op annotation-enumeration primitive used by exploit-kit JavaScript to stage payload reads from annotation /Subject fields before eval(). Not a vulnerable sink itself; rarely seen in legitimate PDFs. (matched in decompressed stream)
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` `860eae5f96eb426380281c575a089242b50523bbb4bbb8dd765e582cd9c07d2e`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	294 bytes
`legacy_pdfkit_stage_000.js` `bf139d87e4eff6abb9a87a2ec8ecde315da90a01e1c5ca60b942f005653d3ffa`	deobfuscated-js	z-percent hex-pair decoded JavaScript at offset 0x2E8	5177 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` `c075f2b0e9f52d81ee0defcbda48cd91bfa0ce203eccf2c28ce75e1002ff57f1`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2E8	12397 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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