Malicious PDF — malware analysis report

Static analysis result for SHA-256 381f864a41f09f75…

MALICIOUS

PDF

6.0 KB Created: 2008-09-24 19:47:56 Authoring application: Adobe
MD5: ee6b1f898c6012d4057b46b8ed278f21 SHA-1: 8c26c883701dd664f3e4c86a30c301a31e382ad6 SHA-256: 381f864a41f09f75d859536445cc380fe2544532927f01e19bbb3d97defb67e9
200 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

This PDF file contains embedded JavaScript that exploits CVE-2009-0927 (Collab.getIcon) and CVE-2007-5659 (Collab.collectEmailInfo). The JavaScript is obfuscated and likely designed to download and execute a secondary payload, as indicated by the ClamAV detection of Pdf.Dropper.Agent-1828700 and the presence of a deobfuscated JavaScript file named legacy_pdfkit_stage_000.js. The attack pattern involves leveraging these known PDF vulnerabilities to achieve arbitrary code execution.

Heuristics 6

  • Collab.getIcon — CVE-2009-0927 critical CVE exact CVE_2009_0927
    PDF JavaScript calls Collab.getIcon — CVE-2009-0927 is a stack buffer overflow in Adobe Reader triggered by Collab.getIcon() with a crafted argument. Allows arbitrary code execution. (identified after JavaScript deobfuscation)
  • 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)
  • ClamAV: Pdf.Dropper.Agent-1828700 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-1828700
  • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0006_000.js
06729b2e6929bb3534cd5a9b41fb31c09bcc1038c332fc2b101e8302790a2569
pdf-javascript-stream PDF /JS object 6 at offset 0x1406 136 bytes
javascript_obj0016_001.js
bac489a489c3f0458ca365d9571cdef8ff59a5bd2baba911750ac708d8464284
pdf-javascript-stream PDF /JS object 16 at offset 0x14D3 170 bytes
legacy_pdfkit_stage_000.js
f15fc9701fbe9ffeda0f3214898d47d2987d39ffad6cc912fac2cade6be3a65b
deobfuscated-js repeated-marker hex decoded JavaScript at offset 0x1E7 4949 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 9 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).