PDF malware analysis — malicious · b8652108d508b40a

MALICIOUS

PDF

56.9 KB

MD5: b13c29efaa2169366205c43dcf217e1f SHA-1: 0427ed653871103e468f9638222511775c40ad8f SHA-256: b8652108d508b40ac666b7d01b822fb236c88c278f6c28812ca9b693c8cdce1b

218 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that leverages CVE-2009-0927 (Collab.getIcon) and CVE-2007-5659 (Collab.collectEmailInfo) vulnerabilities. The JavaScript is obfuscated using eval() and unescape() functions, indicating an attempt to download and execute a second-stage payload. The specific vulnerabilities exploited suggest a targeted attack, but the exact family remains undetermined.

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)
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)
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits
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_obj0008_000.js` `4e48a03c442d4d30417aaedfeec67b51af4e0ac49506e3695eb260e06b11af70`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1F3	463 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` `fc5732da2cb44454e7367ddb95c543d3e9f3a6616d168f0833db5f6387d08559`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x3F8	11386 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 10 eval/decoder/string-building token(s). Carved artifact contains 4 long base64-like blob(s).

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