PDF malware analysis — malicious · e17a3980b2b4565f

MALICIOUS

PDF

3.5 KB

MD5: e73eff8998cba17f2ff9eab245c02538 SHA-1: 88fae0022b2001744d1a3a01b958ac49d24b6775 SHA-256: e17a3980b2b4565fd50d926892073a8153ae0306cb195cb4dc615e5a394b3e5d

280 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF document contains embedded JavaScript that utilizes eval() and unescape() functions, indicating obfuscation. Critical heuristics identify exploitation of CVE-2009-0927 (Collab.getIcon) and CVE-2007-5659 (Collab.collectEmailInfo). These vulnerabilities are commonly used to download and execute further malicious payloads. The presence of obfuscated JavaScript streams and the exploitation of known PDF vulnerabilities strongly suggest a malicious intent, likely to deliver a second-stage exploit or malware.

Heuristics 8

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: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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_obj0004_000.js` `e8e182d9ab486f4a6618509a7a84d52b664baf1318fe0c27117c717de684a967`	pdf-javascript-stream	PDF /JS object 4 at offset 0x249	29709 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`numeric_charcode_stage_000.js` `8cd9480b5ab7a6e233055ab8c7d02c79a805ab609a7219beef41915f6c3a45c9`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x2B2	6677 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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