PDF malware analysis — malicious · eedcf24b3ca4d44c

MALICIOUS

PDF

3.9 KB Created: 2008-31-20 53:85:00 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 76a3acaf3d644adb79d3a4bf9f38bdae SHA-1: d3c5c51832d791776d5b102a7e55eb2c9e643483 SHA-256: eedcf24b3ca4d44cfc17d1e12bbc9b42e186b3deb6b94f87945c1d86ce8d675a

376 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript and triggers an OpenAction, indicating an attempt to automatically execute code upon opening. Critical heuristics identify exploitation of CVE-2007-5659 (Collab.collectEmailInfo) and CVE-2008-2992 (util.printf), both known PDF vulnerabilities. ClamAV detected the file as Win.Trojan.Agent-36168, and a suspicious JavaScript artifact was extracted. The embedded JavaScript is likely responsible for downloading and executing a secondary payload.

Heuristics 9

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)
util.printf — CVE-2008-2992 critical CVE exact CVE_2008_2992

PDF JavaScript calls util.printf() — CVE-2008-2992 is a stack buffer overflow in Adobe Reader triggered by a long format-specifier argument. Widely exploited in the wild after disclosure. (matched in decompressed stream)
ClamAV: Win.Trojan.Agent-36168 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Trojan.Agent-36168
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
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)
Suspicious extracted artifact high 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.
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `ba47f18c0adb5e30211067b62d0d9581c309246989c4a001b783b4b255172e16`	pdf-javascript-stream	PDF /JS object 13 at offset 0x841	3189 bytes
Detection ClamAV: Win.Trojan.Agent-36168 Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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