PDF malware analysis — malicious · 77d17c2e76a71b1b

MALICIOUS

PDF

13.2 KB

MD5: 0706f38d73a67077f1ef27af80f1613d SHA-1: db09fd288a38ed4fe96c2aa0cf659b8319ce599f SHA-256: 77d17c2e76a71b1b2bdcc861e975b44f5dbc434f2dac78da9370fa4bc246835b

138 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.002 Malicious File T1059.001 PowerShell

The PDF file contains embedded JavaScript that exploits CVE-2007-5659 using the Collab.collectEmailInfo method. The heuristics indicate that this JavaScript is deobfuscated and likely serves as a loader for further malicious activity. The presence of multiple deobfuscated JavaScript files suggests a multi-stage attack designed to download and execute additional payloads.

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-36064 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36064
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` `a5c8f0f722df4dd9876a0087e1eee65bd3020c5995f94f6729f7e17f3f3677a0`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	331 bytes
`legacy_pdfkit_stage_000.js` `30c18706deec1897e154b9794f30b22634b0aabbc7a9ff7cb3a4d795ac37b9f6`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F2	12458 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `99346a624cbb0b6a73c957d0edca4b04ac69e9c595c74d7c901c93cfc55ce926`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F2	5146 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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