PDF malware analysis — malicious · 8e4bfb3c96348259

MALICIOUS

PDF

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

MD5: 2e36666c0509cc7c59170942d617e541 SHA-1: 7539b782eb55916ddfb7f5b992cdc6f0d9959d15 SHA-256: 8e4bfb3c963482593b747fcc37757cfea5e4f07f1e2cb6858cd4835acabb838d

298 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file contains embedded JavaScript that exploits known vulnerabilities (CVE-2009-0927 and CVE-2007-5659). The JavaScript is obfuscated and uses eval() to execute, indicating it's designed to download and run a second-stage payload. ClamAV detections further confirm its malicious nature, identifying it as Pdf.Exploit.Agent-35931 and its extracted artifact as Js.Exploit.Shellcode-18.

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` `13a4adb2260539e660b2b54090b4b0dfb11f3fb50f83e7ddc81acc86ddf8ab4c`	pdf-javascript-stream	PDF /JS object 6 at offset 0x1313	743 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` `7b7b16a0e7ff84b0a44882eb38812ac9923d10301c4c332cd72173db0c38ac06`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x16E	4825 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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