PDF malware analysis — malicious · 43b9cd4c853017b5

MALICIOUS

PDF

4.9 KB Created: 2009-08-26 19:45:56 Authoring application: Eblasha 9.2.8.7 (via PDF Library 10.6.6.1)

MD5: c607fc27ced770e6d99a1c7549e7e493 SHA-1: 72be84fefe08fe30395956fffa9ccec6188f3f61 SHA-256: 43b9cd4c853017b5ffe9f38c109ae8bf457c4608efc7d26d24b8c10bd2ecec45

326 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains multiple critical heuristic firings indicating exploitation of CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992 through JavaScript embedded within the document. The deobfuscated JavaScript (`numeric_charcode_stage_000.js`) is also flagged as a suspicious artifact, likely serving as a dropper for further malicious activity. The ClamAV detection of 'Pdf.Dropper.Agent-7255327-0' further supports this assessment.

Heuristics 9

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)
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.Dropper.Agent-7255327-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7255327-0
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.
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.
ASCII85Decode filter (with exploit indicators) low PDF_FILTER_85

ASCII85 encoding filter present alongside exploit delivery indicators — uncommon outside of obfuscation
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_000.js` `c705d2f259285fd8834746cc354121bf930847e9c11e02b87e8c439143971e39`	pdf-javascript-stream	PDF /JS object 13 at offset 0x37C	26821 bytes
`numeric_charcode_stage_000.js` `eebacc5cbbbf38dd38997e3d86cc29807e4930b8b35fdbfc2b48a2b17276074c`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x3C9	8214 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 9 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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