PDF malware analysis — malicious · 3472626dcba2a93c

MALICIOUS

PDF

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

MD5: 9cbd2a9c729b7748237c0ced5da283b9 SHA-1: 5da8d22872a1144dffb5690920608611a9cb44b6 SHA-256: 3472626dcba2a93c2c2d37eb67d6d5984841e6d23f840e06b1f64157d495c5e8

298 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The sample is a PDF file that exploits CVE-2009-0927 and CVE-2007-5659 vulnerabilities. It contains embedded JavaScript, including eval() calls, which is indicative of an attempt to execute malicious code. ClamAV detections further confirm its malicious nature. The primary attack vector appears to be the exploitation of these PDF vulnerabilities to run obfuscated JavaScript, likely to download and execute a second-stage payload.

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` `a3aa5f7454d19f5f98b41fff1fb68ba8d74cb126ccb37d9e3fe8be2a27f6c78b`	pdf-javascript-stream	PDF /JS object 6 at offset 0x1419	897 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` `186340241e5fafa3955e017cac362435f981c98eb57e49c76906eb446522d672`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x16E	5129 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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