PDF malware analysis — malicious · bd9aadc7460bfd3b

MALICIOUS

PDF

2.9 KB

MD5: a723e34a2aaa3a8d6378469ef3afbea1 SHA-1: 912ad2bdac29e88ffd84e273e92f2c3859325c56 SHA-256: bd9aadc7460bfd3b0825ef1ba8b29f9aed9d8f75319fe79fd7ebc3b2ca9d3d0b

398 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File Execution: Malicious JavaScript T1059.007 Scripting: JavaScript

The PDF file contains multiple critical heuristic firings indicating exploitation of CVE-2009-4324, CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992 through embedded JavaScript. The 'OpenAction' trigger and 'eval()' calls suggest the JavaScript is designed to execute automatically upon opening the PDF. An extracted artifact, 'legacy_pdfkit_stage_000.js', was flagged by ClamAV as 'Pdf.Exploit.Agent-35646', further supporting the conclusion that this PDF is a malicious exploit delivery mechanism. The exact payload or final destination could not be determined due to obfuscation, but the intent is clearly to leverage these vulnerabilities for code execution.

Heuristics 10

media.newPlayer — CVE-2009-4324 critical CVE exact CVE_2009_4324

PDF JavaScript calls media.newPlayer — CVE-2009-4324 is a use-after-free in Adobe Reader's multimedia plugin triggered by media.newPlayer(). Actively exploited as a zero-day in December 2009. (identified after JavaScript deobfuscation)
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 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.
OpenAction trigger high PDF_OPENACTION

PDF has an /OpenAction — code runs automatically when opened
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_obj0007_000.js` `c38133d8105b93d5876db9a2d1be4d5d8bf92bfdfbc139444af52ec6506f2584`	pdf-javascript-stream	PDF /JS object 7 at offset 0xDB	27938 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `efe1c6483fb69d7c0d554cae48b172a0068fcbde296714f7f1201bba0bc71811`	deobfuscated-js	split-join delimiter stripped JavaScript at offset 0x107	7490 bytes
Detection ClamAV: Pdf.Exploit.Agent-35646 Obfuscation or payload: likely Carved artifact contains 13 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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