PDF malware analysis — malicious · edef579f49c9f718

MALICIOUS

PDF

6.2 KB Created: 2008-09-24 19:47:56 Authoring application: Adobe (via Notepad)

MD5: 88c94a43668ba787a1a3c5c056a73d07 SHA-1: 3a9dc5380327ab6659ed2ee400cdcc9ca6a977f3 SHA-256: edef579f49c9f718642ffda0c7f0c6c1b8679c9705c075f1eeffa6cb823dcdac

298 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1204.002 Malicious File

The sample is a PDF file that leverages two critical vulnerabilities, CVE-2009-0927 and CVE-2007-5659, to execute obfuscated JavaScript. This JavaScript is further deobfuscated and contains shellcode, indicating it's designed to download and execute a second-stage payload. The embedded URL points to a JavaScript file that may be part of the initial infection chain.

Heuristics 9

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: Pdf.Exploit.Agent-35931 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35931
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.
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://ads.doclix.com/adserver/serve/js/doclix_synd_overlay.js

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `d10ec96da04c5d5d3b4e38e45f2fb6beb4713e2d9fd435d30067c658bc667848`	pdf-javascript-stream	PDF /JS object 6 at offset 0x1318	753 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` `d169fcd229a5a2f3ea8d35717ed76c3e8f386a10216e34607e66576d9582b4df`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x16E	4841 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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