PDF malware analysis — malicious · 1b8de3dea5205b60

MALICIOUS

PDF

8.0 KB Authoring application: Cdidinavav (via Kogibeqitima)

MD5: 6f3b856d202fa4ed0c5791bfa46dd329 SHA-1: b9f3eb10ce20dc103165f27917a7faca80f0bc29 SHA-256: 1b8de3dea5205b60579471357f938831ec21379aef8c2ba1531c9ecbc1b1b830

218 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that utilizes the `unescape()` and `eval()` functions, indicating obfuscation. Critical heuristics confirm the exploitation of CVE-2009-0927 via the `Collab.getIcon` API. This exploit is designed to execute arbitrary JavaScript, which in this case is likely used to download and execute a secondary payload. The presence of two extracted JavaScript files further supports this analysis.

Heuristics 7

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)
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` `9737406275e610bea5943a0b149a7012c8d2c91d5c678dddd892d3e057fd0393`	pdf-javascript-stream	PDF /JS object 7 at offset 0x50C	6353 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` `e02e2a3bae5c73bf215cd72464cd0cd24899c02b4725be7065c7303db8f7b64c`	deobfuscated-js	string-concatenation normalized Acrobat API aliases at offset 0x50C	276 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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