PDF malware analysis — malicious · 8aef9b96ac45c610

MALICIOUS

PDF

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

MD5: b4201c494a0376b4a783d0637e516352 SHA-1: 5acd06253f71ba9d3bef423354b821fc14b0ba5c SHA-256: 8aef9b96ac45c61045548c6e9c4ad32e9b98e63a591b896ad284c2d931a025b7

298 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that leverages known vulnerabilities (CVE-2009-0927 and CVE-2007-5659) to execute code. The heuristics indicate the use of eval() and JavaScript actions, with ClamAV detecting it as Pdf.Exploit.Agent-35931. The embedded JavaScript files, particularly 'legacy_pdfkit_stage_000.js', are likely responsible for downloading and executing a secondary payload, as suggested by the 'Js.Exploit.Shellcode-18' detection on extracted artifacts.

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` `54e7eb91cd4d3d8297598f061e611260fc539fd2adbc4e467fe658503e8300ce`	pdf-javascript-stream	PDF /JS object 6 at offset 0x131C	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` `a1a7779c49111b0ce9cd54addc34b156c4613f92d49295935da0443eccbad1df`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x16E	4843 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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