PDF malware analysis — malicious · 3ef3245b1ff619cf

MALICIOUS

PDF

12.9 KB

MD5: d099fbda71570f95d30937b18987be48 SHA-1: 3eec7c778b409e4ed752d4ee205ebafaf1900daa SHA-256: 3ef3245b1ff619cf2232365988ad990ac09cd21fdcab3aae8fd27a170738deb5

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that is obfuscated and likely intended to download and execute a secondary payload. Heuristics indicate the use of CVE-2007-5659, a known vulnerability in Adobe Reader related to JavaScript execution. The extracted JavaScript files, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, are suspicious and likely part of the exploit chain. The ClamAV detection 'Pdf.Dropper.Agent-7253071-0' further supports the malicious nature of the file.

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.Dropper.Agent-7253071-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7253071-0
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` `1847af0a099665b6ac45af66402e56ed64237a1b287618ee3d6643267fda6f35`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	343 bytes
`legacy_pdfkit_stage_000.js` `787172b677245cdbba4cf0b2def20807689957f7a4bbd244b53354ab7a727ea5`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	12652 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `a6cbafc065a80afed1a9c715e929477f8db660feb5423439f2223d8fa7a9fee3`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	5245 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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