PDF malware analysis — malicious · 94168bf6a4fbcf1c

MALICIOUS

PDF

11.9 KB

MD5: 0fe0d391540a86b30d1a0837f60ececd SHA-1: 41e20e0d7c36e748b7ef7bca01ddc8b3908b1a8c SHA-256: 94168bf6a4fbcf1c2d1f8c6a54a6bfcf9723a288b71ac7ef579467159931682f

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 files. The embedded JavaScript streams, particularly the deobfuscated ones, suggest the execution of malicious code. The primary intent appears to be the download and execution of a second-stage payload, as indicated by the nature of the extracted JavaScript and the ClamAV detection signature 'Pdf.Exploit.Agent-36079'. No specific family could be confidently identified.

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` `81301784212bf0458cc1f54c8889b494ad5e99adffe8fc80f8a0a7052287be06`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	12270 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `be65d6775a3e1adfdc2914bc849abcd8e0a5d12ee222c44fc7768ae63dc400e6`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	5097 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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