PDF malware analysis — malicious · b9f483b9f82b203f

MALICIOUS

PDF

12.4 KB

MD5: c38a1994b40a0f9ace421ed5cc1fa57c SHA-1: 78f167c5cbea6627ffa065dd8979dd8a813481ee SHA-256: b9f483b9f82b203fcd9c90269585adbabfd018cb563863c2b24b060ed29d9349

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by the PDF_JAVASCRIPT and PDF_JS heuristics. Critical heuristics indicate the exploitation of CVE-2007-5659 using a method that concatenates info fields and evaluates the result. ClamAV also detected this as Pdf.Exploit.Agent-36062. The presence of deobfuscated JavaScript files suggests the script's purpose is to download and execute further malicious content, aligning with a typical exploit delivery mechanism.

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 1 related finding 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` `a86d748a1430d330abed724a446fae12e58e334d32938e34aedca8b3a3b42e70`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12064 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `f31fa24bf7784d8c400135c6854a4e3bf5f1ebcf1c05dedddcf5ce9e5f4da2ac`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4990 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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