PDF malware analysis — malicious · 417f41601983c264

MALICIOUS

PDF

8.1 KB

MD5: e7060a32a47fd1e3f80c468e821c7673 SHA-1: 4a8402b38290e74e748e5ffd379c8918cfd10eff SHA-256: 417f41601983c264371e915a5b33e6357b9c2a779920aab36aa2680c3f9bbb1a

158 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious Link

The critical CVE_2007_5659 heuristic indicates the sample exploits a known vulnerability in PDF readers. The embedded JavaScript, particularly the use of eval() and String.fromCharCode, suggests code execution. The ML classifier strongly supports a malicious verdict. The primary attack vector appears to be leveraging the Collab.collectEmailInfo method to trigger the exploit, likely leading to the download of additional malicious content.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

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 (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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0004_000.js` `e43558667e8778ceb18005bb7674368fb08f17767fb50b8f4c2a5401d1821b61`	pdf-javascript-stream	PDF /JS object 4 at offset 0xE1	309 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` `5eb9f795b6810f377d84e0b669f896cbacc1e39b6d0df89b3d756cdc3dcbe9c9`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1B24	1651 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `11b6f0f5701ca87462121ffd834c50818e085c9a4a0c339cc654678cdf5aab20`	deobfuscated-js	annotation-subject callee-key decoded JavaScript at offset 0x35A	5112 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.