PDF malware analysis — malicious · 977fcc51c15635a3

MALICIOUS

PDF

12.0 KB

MD5: 332ac42f3ac937871ed1afa9540538c6 SHA-1: 709bb6940741e9a39ff92efeb53c75f4a3e35fd7 SHA-256: 977fcc51c15635a35f7aad3462a7ec67795a53d148c5a4b60b7789291ece727c

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 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 supports the malicious nature of the file. The specific exploit used is identified as CVE-2007-5659.

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` `b4def862fda59819d24009d950c312dc421e8a79fa95b477a8cb6ee878a87ce4`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	12538 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `8431ce12ce0a3c241bae641ad032aa3273599d62da35ca8bc5db43efd548db90`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	5164 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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