PDF malware analysis — malicious · 9d3b80fa00f07ba4

MALICIOUS

PDF

12.4 KB

MD5: 2028b77c09471634961b9fd14d6c16c4 SHA-1: 3dedcc06d9ffb599d5cba5e5b981d92b2d7f050b SHA-256: 9d3b80fa00f07ba46a7db76038204431b970728d52a6cb510798f3ad3de679d1

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability, specifically using the Collab.collectEmailInfo function. This JavaScript is further obfuscated and split into multiple streams, suggesting an attempt to evade detection. The presence of deobfuscated JavaScript files named 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js' indicates a multi-stage loading process, typical of malware downloaders.

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` `0b8e560505539257dfcd150e093cab2dbd42cda2843461c535cbdd966a0bf67b`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12055 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `294cb7f37b62ebea48ea23d9c33d37f8c3a0452b7783c04be6e6d308cae6ad3a`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4988 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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