PDF malware analysis — malicious · 386d0679cb83255e

MALICIOUS

PDF

9.3 KB

MD5: b9c568781b2950fd09ad15f9b609b774 SHA-1: 1756f90abc2746113464a393f3b90015bcac71c4 SHA-256: 386d0679cb83255e57bb15336f22678fb6a21eae93e6fa77369d306ed0755f4d

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The file is a PDF containing embedded JavaScript, triggering critical heuristics for CVE-2007-5659 (Collab.collectEmailInfo) and ClamAV detection as Pdf.Exploit.Agent-35905. The JavaScript is obfuscated and uses unescape() calls, indicating an attempt to hide malicious code. The primary attack vector appears to be exploiting a known PDF vulnerability to run arbitrary code.

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` `74461548e11e77a70fb936b58fb6d6beb1750b795d3f59e04172621d32e90e2d`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	11984 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` `512c4d6e0ff1a6f136e05bfae7b86914daf25aa5d2134408a6406e4e42542c08`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	5049 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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