PDF malware analysis — malicious · bd2873f490a38a73

MALICIOUS

PDF

16.8 KB Created: 2010-01-01 07:27:45 Authoring application: Fexaxououazobb

MD5: a9f74e0bf8b6f3fb07b5697e66cbf0c3 SHA-1: c8f38675375b4854f50b91b1393d8dc396ece5ad SHA-256: bd2873f490a38a73f8ed863e3c6a9a956d68d958f7adc70b59960bca1a354f0e

258 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

This PDF file contains multiple critical heuristic firings indicating exploitation of CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659 through embedded JavaScript. The JavaScript is heavily obfuscated and appears to be designed to download and execute a secondary payload, as suggested by the ClamAV detection of 'Js.Exploit.Shellcode-18' on an extracted artifact. The document body is unreadable, but the exploit indicators are strong.

Heuristics 7

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)
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.
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0012_000.js` `70a826ad4e839117ad60c86898fa7101c62259a13bde5f6937587c42a2572d60`	pdf-javascript-stream	PDF /JS object 12 at offset 0x4FA	985 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`javascript_obj0028_001.js` `714fdfa3a4b2f276f5c7494b19b4aa7e57bb1ea14515908636bf96b991661ff8`	pdf-javascript-stream	PDF /JS object 28 at offset 0x1B9	1887 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `b04ca16495a45d8a373e1591b98fe8baf6b65fb974b04778cfdc59f10cd720aa`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x769	30339 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 101 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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