PDF malware analysis — malicious · 79ce322aabf3f67b

MALICIOUS

PDF

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

MD5: c3f301a6f43ee2a2b1973374243a6f3a SHA-1: c282f701d43252814fb660a8ae0fb9558ff976d5 SHA-256: 79ce322aabf3f67bcfeb30e311543fc5732e2ceccb0ed250b2fd2d61bb956de5

258 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 JavaScript

This PDF file contains multiple critical heuristic firings indicating exploitation of CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659. These vulnerabilities are leveraged to execute embedded JavaScript. The ClamAV detection of 'Js.Exploit.Shellcode-18' further supports the malicious nature of the extracted JavaScript. The embedded JavaScript streams are likely responsible for downloading and executing a second-stage payload.

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` `7812daca5c1e0d67609614341034f0be79638bcd427cb0f5c76951e91fdb9cba`	pdf-javascript-stream	PDF /JS object 12 at offset 0x4C9	1338 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s).
`javascript_obj0028_001.js` `64484a95938abc693709f0b8180b1e1b7727d59627b21eb10126ec53579b8029`	pdf-javascript-stream	PDF /JS object 28 at offset 0x1B9	1620 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `cd7b6ae594ebbbe12233852ad433e6cfc11eb6041d2e48740dae22093d37e99f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x764	31843 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 87 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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