PDF malware analysis — malicious · abdc48136cba9b1b

MALICIOUS

PDF

4.9 KB Created: 2010-01-21 05:26:20 Authoring application: a14b124f56098798f6e898500a

MD5: d2403c6663fb63eda29f645b27ce5fec SHA-1: 6d0f95a047718e41de5cebc1a9da9f8b43d39637 SHA-256: abdc48136cba9b1bc771ed4502efd171fc9db233f0f29e2aafc2efd80c78d4b9

258 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that exploits multiple known vulnerabilities including CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659. The heuristics indicate that this JavaScript is used to launch further malicious activity, likely downloading and executing a second-stage payload as suggested by the ClamAV detection 'Js.Exploit.Shellcode-18' and the presence of a deobfuscated JavaScript file named 'legacy_pdfkit_stage_000.js'. The attack pattern is consistent with a malicious PDF designed to exploit browser or PDF reader vulnerabilities.

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` `cf3115af6858461b548936381d923176c476146ec90cff09807989d2229b96b6`	pdf-javascript-stream	PDF /JS object 12 at offset 0x374	155 bytes
`javascript_obj0028_001.js` `944b2dca537e63cf205d689b70655b8951c5a600fe342dc9635407df9319a57d`	pdf-javascript-stream	PDF /JS object 28 at offset 0x228	428 bytes
`legacy_pdfkit_stage_000.js` `b4b7922e76f3335d61ae9c7a428dcee529ea1c9c0a70c8471f00a7652fca5ccf`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x4C5	7337 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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