PDF malware analysis — malicious · d8271dfd8f014ce9

MALICIOUS

PDF

4.9 KB Created: 2010-01-21 04:38:25 Authoring application: ad60ef12646e29d6e

MD5: 456e14058041d949535277d50277b34a SHA-1: 37a268a67fe24acdb88e69237ecdd86a1c0dd1b4 SHA-256: d8271dfd8f014ce95d5d7d7ce3a615799ddda8a531ab5b93ad7ac8f02b1b8502

258 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file contains embedded JavaScript that exploits multiple known vulnerabilities including CVE-2009-4324 (media.newPlayer), CVE-2009-0927 (Collab.getIcon), and CVE-2007-5659 (Collab.collectEmailInfo). The heuristics indicate that the PDF launcher concatenates info fields, extracts characters at a fixed stride, and evaluates the result. An extracted artifact, legacy_pdfkit_stage_000.js, was detected by ClamAV as Js.Exploit.Shellcode-18, suggesting it is a malicious script designed to download and execute 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` `6e77c21dad60b18af5a1611d45020d374ad4a5221ca26e13ec7f6c55af0c6f69`	pdf-javascript-stream	PDF /JS object 12 at offset 0x36F	156 bytes
`javascript_obj0028_001.js` `bfa0b4818e9178c4ef251f40288fc3635d1b714069ef7227a116e5decdd842b7`	pdf-javascript-stream	PDF /JS object 28 at offset 0x220	428 bytes
`legacy_pdfkit_stage_000.js` `687cc5d8090ae024b0a3009ce86ddd4aeb782c193ed3e99ffd24e38bd624ee49`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x4C1	7369 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 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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