PDF malware analysis — malicious · 94ee8f7207dd2480

MALICIOUS

PDF

9.3 KB

MD5: 3fae58c5915698866641ab52030204ed SHA-1: 876d04c39fc075da4d292cc861ad62ea9d2aa8d7 SHA-256: 94ee8f7207dd24807ecaa9391145d22b6af8c145bc693c6254b9cc5bb0e2643a

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The file is a PDF containing embedded JavaScript, identified as malicious by ClamAV (Pdf.Exploit.Agent-35905). Heuristics indicate the use of JavaScript actions and streams, specifically leveraging the CVE-2007-5659 vulnerability through the Collab.collectEmailInfo method. This exploit likely decodes and executes JavaScript to download and run a secondary payload, as suggested by the presence of large, obfuscated JavaScript artifacts.

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` `8d66f3a68286ce932f04f097a5d7726febbb81d5949c255b6c1a464d21add6f8`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	11979 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` `c7b9880e5b2851803c4a8cc0138b41151a731e69bf87d3aaf41801b76eb0b691`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	5030 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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