PDF malware analysis — malicious · fe7c50e908a45e89

MALICIOUS

PDF

2.3 KB

MD5: 2173010d2c6c50fea011e728744345e5 SHA-1: eae30882bc2e0952f1fbc6b28c4eed6c54781018 SHA-256: fe7c50e908a45e89745b96fc3f61a8c1a7827f01c378a18f5f5d4f5ffe6c5249

220 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

This PDF file contains embedded JavaScript that is triggered by the 'OpenAction' directive. The JavaScript utilizes 'eval()' and exploits CVE-2009-0927 (Collab.getIcon) and CVE-2008-2992 (util.printf) to deobfuscate and execute code. This technique is commonly used to download and execute a second-stage payload from a remote location.

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` `6db9696230d57a049eff714e7d30e00144764f56e54d01a64b44834b53314cdb`	pdf-javascript-stream	PDF /JS object 9 at offset 0xBC	21096 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` `a057cb968821544c6a60dbbee8d2bd99461d326dccddb28035a6b99a5b780d67`	deobfuscated-js	split-join delimiter stripped JavaScript at offset 0xE6	5739 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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