PDF malware analysis — malicious · a12ada8e59f7a0a3

MALICIOUS

PDF

9.5 KB

MD5: aac2f49b0447351bed5f72afbcf93bda SHA-1: ab6f54d182fe20d14e6dbd2259325deb4a7e0a55 SHA-256: a12ada8e59f7a0a3858031f0c8ab5bb546a29be226a7aec5e9c9f128a1c904cd

178 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains embedded JavaScript that is obfuscated and uses the unescape function, indicating malicious intent. The critical heuristic firing for CVE-2007-5659 confirms the exploitation of a known PDF vulnerability. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, as suggested by the nature of the exploit and the presence of multiple extracted JavaScript files. The ClamAV detection further supports the malicious classification.

Heuristics 6

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-35905 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35905
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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` `d8a6b4ad1abf04d0c4a4f89535cfb57f7312edef25c443f4e844c8ec9d0929dd`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19B	352 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `da51e0919e2288becf04d1eac49b22c3e34e0400557314f55bef0b2d386aad5a`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	12134 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `89d5b61cce14a024e6c7bd9102880cbb222cee5d26255a3a41178079e5dc4119`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	5090 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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