PDF malware analysis — malicious · a1ff6226b5704327

MALICIOUS

PDF

2.7 KB Created: 2008-08-06 01:42:27 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 2aec70ae6be95ee022350dc9c1a3eba3 SHA-1: eadc82acb1d009be51ac493a116ddf3c95720766 SHA-256: a1ff6226b5704327f6b3113ff1bbf8f4c1bd84cb972810fb19490c63bd5ec9c4

160 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that is triggered by the OpenAction. The 'CVE_2007_5659' heuristic indicates the use of the Collab.collectEmailInfo method, a known vulnerability in older Adobe Reader versions. The JavaScript is obfuscated, but the presence of 'unescape()' and the 'PDF_JAVASCRIPT' and 'PDF_JS' firings confirm its malicious intent to execute arbitrary code. The file is likely a dropper for further malicious payloads.

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)
OpenAction trigger high PDF_OPENACTION

PDF has an /OpenAction — code runs automatically when opened
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_obj0013_001.js` `1270efdc984feb45ccd6cc13e3c3d94f4428ee7ee57d9e8dcbc53024c55268d5`	pdf-javascript-stream	PDF /JS object 13 at offset 0x363	2737 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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