PDF malware analysis — malicious · 596b408285caffbf

MALICIOUS

PDF

2.3 KB

MD5: 23e65f52938f1ec01e3f69ec97e21af8 SHA-1: 16985779481375689c4b126e32652235c2c32f85 SHA-256: 596b408285caffbfc33a13192273068091098c11e611b6f29f64d8b52972be66

220 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF document exploits CVE-2009-0927 and CVE-2008-2992 vulnerabilities through its OpenAction trigger and embedded JavaScript. The JavaScript, which is obfuscated and uses eval(), is designed to download and execute a second-stage payload. The specific vulnerabilities exploited are identified by the heuristic firings.

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)
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)
OpenAction trigger high PDF_OPENACTION

PDF has an /OpenAction — code runs automatically when opened
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (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_obj0009_000.js` `d32872aa38f41b1ffcf397a67ffc0242fb3e90744260eb4d4b32f36594b6d7b6`	pdf-javascript-stream	PDF /JS object 9 at offset 0xBC	21108 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `4c18bf7ae8ad2cdb5bb502c8c0f8d718befcfd727c231d14483808c8e5102988`	deobfuscated-js	split-join delimiter stripped JavaScript at offset 0xF1	5751 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 11 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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