PDF malware analysis — malicious · 2bd228c3d42b23a4

MALICIOUS

PDF

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

MD5: 722b61634a088d5194a52bdc397d6fed SHA-1: c89e99dcf8f43e184f51f5a8c932f1094319ac18 SHA-256: 2bd228c3d42b23a420207b72ec22a42934325c6b1019214d6bca40e03f027122

396 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file contains embedded JavaScript that is triggered by the OpenAction feature, exploiting CVE-2007-5659 and CVE-2008-2992. The JavaScript uses eval() and String.fromCharCode() for obfuscation, and the deobfuscated script likely downloads and executes a second-stage payload. ClamAV also detected this file as Pdf.Exploit.Agent-35384.

Heuristics 10

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)
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. (identified after JavaScript deobfuscation)
ClamAV: Pdf.Exploit.Agent-35384 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35384
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
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (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.
String.fromCharCode medium PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically (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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `4222d62fae48efa51f2f195d6f1b0ab147ac59b26b78c3398d0d8a83e73d9dfc`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D7	14908 bytes
Detection ClamAV: Pdf.Exploit.Agent-35384 Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).
`numeric_charcode_stage_000.js` `274555a4a73cc25420423ab63388870214f7609c9e2e32aec79751817c23a991`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x42F	4419 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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