PDF malware analysis — malicious · 291a1f582c37cc09

MALICIOUS

PDF

7.5 KB Authoring application: Viraciregavi

MD5: 3962a35c6a858cf9b04a964db9d463f8 SHA-1: 3a064eea56ee8647801a9a9d882473ae633b2167 SHA-256: 291a1f582c37cc094a230b96e110e060cfb4e702f9dada7d10c4f444b6c6c530

338 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

This PDF file contains embedded JavaScript that utilizes several critical CVE exploits (CVE-2009-0927, CVE-2007-5659, CVE-2008-2992) targeting Adobe Reader. The JavaScript employs `eval()` and `unescape()` functions, indicating it's designed to deobfuscate and execute malicious code. The presence of these exploits strongly suggests the document's purpose is to compromise the user's system by downloading and running a secondary payload. The ClamAV detection further supports its malicious nature.

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)
util.printf — CVE-2008-2992 critical CVE exact CVE_2008_2992

PDF JavaScript calls util.printf() — CVE-2008-2992 is a stack buffer overflow in Adobe Reader triggered by a long format-specifier argument. Widely exploited in the wild after disclosure. (identified after JavaScript deobfuscation)
ClamAV: Pdf.Exploit.Agent-35649 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35649
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `42db1646462c55352e5c6d203868d2cdbf0429e99a100c2685200c6a0cf0cddd`	pdf-javascript-stream	PDF /JS object 7 at offset 0x45A	5790 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 11 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `1e0c8ca4c6180400afd62497a161d41969b04e1091a2d4ffa9764c7f00cf51a1`	deobfuscated-js	string-concatenation normalized Acrobat API aliases at offset 0x45A	851 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 long base64-like blob(s).

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