PDF malware analysis — malicious · 9890462e8262d1f9

MALICIOUS

PDF

3.5 KB

MD5: e1b7e031ce9b60a5dab04a8a2cedd924 SHA-1: bded06fc94dd9805bfd02216a2f1021ec99b52aa SHA-256: 9890462e8262d1f9c21ee8fefcb6483b3f45ac7606ce913c430020ffded0b554

280 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

This PDF file contains obfuscated JavaScript, leveraging critical vulnerabilities CVE-2009-0927 and CVE-2007-5659. The embedded JavaScript is heavily obfuscated using `unescape()` and `eval()` calls, indicating an attempt to hide malicious functionality. The primary goal appears to be the execution of arbitrary code, likely to download and run a second-stage payload.

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` `e1f1e845c509b225ac13dc3a19af7bf2422680b82c27b63f1a2b8d03575abd27`	pdf-javascript-stream	PDF /JS object 4 at offset 0x249	30022 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` `26a98f657c309116273af086949a0d12585cd43fecf041772d7aa709e570bd45`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x2B2	6749 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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