PDF malware analysis — malicious · a74dee1bfc6e2f87

MALICIOUS

PDF

17.4 KB Created: 2010-04-23 42:34:45 Authoring application: Fsdfjlfsdlfexxououazobb

MD5: 91003dd6dadb1eb81f86e1432936d0be SHA-1: c4e1e02ec8edaeb1e31d6f735e6a8bb963338546 SHA-256: a74dee1bfc6e2f873dc45dfbc9956357f42d4a755454e07bd067aaebc862b29e

258 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains multiple critical heuristic firings indicating exploitation of CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659 through embedded JavaScript. An extracted artifact was also detected by ClamAV as Js.Exploit.Shellcode-18. The embedded JavaScript streams and deobfuscated JS suggest the primary intent is to download and execute a secondary payload, a common technique for initial access.

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` `2a3fe1f02b327eeca7f6714a4f960978770d7ab9c286dff3bcae0df388ffa366`	pdf-javascript-stream	PDF /JS object 12 at offset 0x213	1605 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`javascript_obj0028_001.js` `febf39bb83d3fc5a313679013a8650a53e69a475cb07932bdce8335d523de81a`	pdf-javascript-stream	PDF /JS object 28 at offset 0x4E3	2531 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `e1fade02e47fd4ffdfcdfa0c0b00f9e0300fbc8f7374ab0950115b760afabc9f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x9A8	29413 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 46 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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