PDF malware analysis — malicious · 88bc907f6ca436c6

MALICIOUS

PDF

5.8 KB Created: 2008-09-24 19:47:56 Authoring application: Adobe

MD5: a717518dc840cdd500807732c73ea890 SHA-1: 95fc59563d5fa56503c3e66ca6f868e065383085 SHA-256: 88bc907f6ca436c6e4b02b5dccccf0e2213de1261e8ea5ed126617c9bda71b80

198 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that exploits CVE-2009-0927 and CVE-2007-5659. Static analysis identified this JavaScript as malicious, specifically flagging it as Js.Exploit.Shellcode-18. The deobfuscated JavaScript, named legacy_pdfkit_stage_000.js, likely serves as a loader for further malicious activity, such as downloading and executing a second-stage payload. The confidence is high due to the clear exploitation of known CVEs and the presence of malicious JavaScript.

Heuristics 6

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_obj0006_000.js` `9adcafeae75b3b3c925b17f78b14576b69b7db777d3ab30dbbd5e7af884a339a`	pdf-javascript-stream	PDF /JS object 6 at offset 0x139B	124 bytes
`javascript_obj0016_001.js` `2a0a0fbbcd79095ea0ba2d4762e869b7ab18d22ab0444913809b4e5d4e47d3f8`	pdf-javascript-stream	PDF /JS object 16 at offset 0x1457	154 bytes
`legacy_pdfkit_stage_000.js` `301756485daa08e42f1ebf7502df160f044c86aee9fc03816ade7a9e800159a2`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1BB	4897 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 9 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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