PDF malware analysis — malicious · 43c6a10dad5e89fc

MALICIOUS

PDF

7.2 KB

MD5: 82bcf98fdab05253205e2a26db905820 SHA-1: 6ee010f80cdd94d899f1a6cb87963a99cc95e157 SHA-256: 43c6a10dad5e89fc0461df9eca6e4fd15f81f75af33c0737c77d333f11103499

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious Link T1566.002 Spearphishing Attachment

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. A critical heuristic identified the 'CVE_2007_5659' vulnerability related to 'Collab.collectEmailInfo', suggesting exploitation. The presence of an extracted JavaScript file ('javascript_obj0006_000.js') and the 'PDF_UNESCAPE' firing further confirm the use of obfuscated JavaScript. This script is likely designed to download and execute a secondary payload, a common technique for initial access.

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. (matched in decompressed stream)
ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `d1a2f0582559b935ec6c78e46c62a89b08a6880db4fb9b2d504d92f70ca09378`	pdf-javascript-stream	PDF /JS object 6 at offset 0x1B3	6080 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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