PDF malware analysis — malicious · 8e346954cf6728c3

MALICIOUS

PDF

11.9 KB

MD5: 59777bf359e50772a4333c249bef3aa0 SHA-1: e37a15c9c276fc1b37b908f5c08fd87d05c7a676 SHA-256: 8e346954cf6728c33a4c2280c5fe27733987515f9de18e31d632dc177f0dd2d9

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The critical heuristic firing for CVE-2007-5659 indicates the exploitation of a known vulnerability in PDF documents. The embedded JavaScript, particularly the deobfuscated streams, suggests an attempt to download and execute additional malicious content. The ClamAV detection further corroborates the malicious nature of the file. The document body was unreadable, so the rationale is based on the exploit and script findings.

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-36079 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36079
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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` `ef8bdac794684ae9cd4eb7091d80e1c5ca478c06c639d72d01626c1f7ce78b6d`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19C	578 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` `30c3a89a3a8dea532f3e2e398728220d8834dcc356f48d302e70efdea6b1dba5`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	12327 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `a3d5ed7dc1a426a550401ab9d81162520a51bff9baefea5b14e412ce18793021`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	5017 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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