PDF malware analysis — malicious · 9c5bd0e4d06cd080

MALICIOUS

PDF

5.8 KB Created: 2008-09-24 19:47:56 Authoring application: Adobe (via Notepad)

MD5: 57395e0e97f94372ab1da8341d5d2262 SHA-1: 239cb3a4413678720946a950dca56717b6bf6bc8 SHA-256: 9c5bd0e4d06cd0806fb2b4375adf437aa57fdf4328995b72a94bb962bed23f3f

298 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF document contains embedded JavaScript that leverages critical vulnerabilities, specifically CVE-2009-0927 (Collab.getIcon) and CVE-2007-5659 (Collab.collectEmailInfo). The heuristics indicate that the JavaScript is obfuscated and uses eval() to execute, a common technique for downloading and running further malicious code. ClamAV detections on both the PDF and an extracted JavaScript artifact further confirm its malicious nature. The primary attack vector is the exploitation of these PDF vulnerabilities to achieve arbitrary code execution.

Heuristics 8

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.Exploit.Agent-35931 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35931
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.
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.
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_obj0006_000.js` `6131e25877ef705bdf66a1987fef897b1782183c466c58e0dd339ae9a3fa2023`	pdf-javascript-stream	PDF /JS object 6 at offset 0x135E	815 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `5680cef22bbebaa16cc95f5ef954317dddff7d8c1296c2bbd47dcc736a01eedf`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x16E	4915 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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