PDF malware analysis — malicious · 9e313dfd258cdf39

MALICIOUS

PDF

6.0 KB Created: e1svrt Authoring application: Adsfgddfobe (via sfgasdfgsd)

MD5: 68d3fffd8c36e8ab8c301f0fb23a72b7 SHA-1: 9cde78d891a9cb04947931dd9f1b8c470a5d0b62 SHA-256: 9e313dfd258cdf39de5b506221de773defc732bff58fec1f108caf1211c2ca9d

258 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript and exploits multiple known vulnerabilities (CVE-2009-4324, CVE-2009-0927, CVE-2007-5659) related to JavaScript execution within PDF documents. Static analysis detected a suspicious JavaScript stream and a deobfuscated JavaScript file, which ClamAV identified as a potential exploit. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, indicated by the heuristic firings and the extracted artifact names.

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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `d9a6c9bbe026dd2beb0fe2806ac7d2958a06ca7f3a047cfd8e07431fb57b4aea`	pdf-javascript-stream	PDF /JS object 6 at offset 0x14A	482 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` `26add04dae79ee391bcdeb934f42f6d8b04560a0f62b697fa7a5e812f39db284`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x30F	11509 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 12 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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