PDF malware analysis — malicious · 9ac3917d67f00389

MALICIOUS

PDF

12.8 KB

MD5: 1930a0565ba46e2ab599c4afc6bbd56b SHA-1: 6605c070845369fc3dab8964e86c1523932110ec SHA-256: 9ac3917d67f0038979ebd85111558e91c4439049a9b9189ef1f0e4c8e3046f0b

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. A critical heuristic identifies the exploitation of CVE-2007-5659 using a method that concatenates info fields, extracts characters at a stride, and evaluates the result. This suggests the file is designed to exploit this vulnerability to run malicious code. Two deobfuscated JavaScript files, 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js', were extracted, further supporting the presence of malicious scripting.

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` `be081ce6c87ef548ff850135489f6c81ba7a05e3ecf9285e38055ab758baeabe`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12555 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `7c88e7b9fe834fa781a94c19245fe0e25c8dc1439f9b946ce1ee4825f79b307d`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5170 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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