PDF malware analysis — malicious · eede5b7389f0c993

MALICIOUS

PDF

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

MD5: 2d1dd429c57046aeaf0678e351833cb1 SHA-1: ce2a9c20ed5619205194196d940ea69c2f063d7a SHA-256: eede5b7389f0c9938ecd2d1c92fe798460e8402e135a4224e173d5fbee26ce65

288 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1204.002 Malicious File

This PDF file contains embedded JavaScript that is triggered by the OpenAction feature. The JavaScript utilizes eval() and String.fromCharCode() functions, and exploits CVE-2007-5659 (Collab.collectEmailInfo) and CVE-2008-2992 (util.printf) to execute arbitrary code. The primary intent appears to be the execution of a second-stage payload, as indicated by the ClamAV detection of Win.Trojan.Agent-36167.

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. (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: Win.Trojan.Agent-36167 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Trojan.Agent-36167
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)
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `079f8f8d421a399d2065f0b383ea6cc747aadab1ee488ca20fb69509c299bdcb`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D7	11355 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`numeric_charcode_stage_000.js` `c784b2d4aaad16f5cacaabdee39a355706a7de6ba6a9e81c847098b584276833`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x437	3300 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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