PDF malware analysis — malicious · c5e8f1c4bf7f816d

MALICIOUS

PDF

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

MD5: a144741b2fe9ba4798bc0b7b78b17da3 SHA-1: 15177ddd36be5ebe2fc0b34e87d9e0a1ac4ab1f0 SHA-256: c5e8f1c4bf7f816dd87818009b033261143deba4de32120de6c5a89ff7ea9461

158 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript and triggers an OpenAction, indicating an attempt to execute code upon opening. The critical CVE-2007-5659 heuristic firing specifically points to the use of the Collab.collectEmailInfo method, a known vector for exploiting vulnerabilities in older Adobe Reader versions. The embedded JavaScript stream, identified as javascript_obj0013_001.js, likely contains obfuscated code designed to leverage this vulnerability to download and execute a secondary payload.

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` `0f934d2ef19f54585cd8e27e26e7cfad56577f02c0dfa7c58c817471bf2cc9a3`	pdf-javascript-stream	PDF /JS object 13 at offset 0x36F	3291 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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