PDF malware analysis — malicious · e9d25edd846ef5b4

MALICIOUS

PDF

8.1 KB

MD5: 2e81d0b80b63d8f58be741b2726ca6cb SHA-1: 6096fdcf7f26389e1be041b810101e935150ce7b SHA-256: e9d25edd846ef5b4d5921f34d754580d6de2aae599fed6addcef071e4e488b29

156 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF sample contains embedded JavaScript, flagged by multiple heuristics including a critical CVE-2007-5659 exploit for Collab.collectEmailInfo. The ML classifier also strongly indicates maliciousness. The JavaScript is obfuscated but appears to be designed to download and execute a second-stage payload, as indicated by the presence of deobfuscated JS streams. The exploit targets a known vulnerability in older PDF readers.

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` `69f834fa57d893f6af140047ffdf5ccbb7be587aeff45a650a29da64a74cde4c`	pdf-javascript-stream	PDF /JS object 4 at offset 0xE1	303 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` `f251fef4c4b0894f0828b246d8c8d19936a51712f2f2e6d6121a1c618d1955fe`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1AFF	1643 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` `8a27225279a1f7c3f63a698fc3bc60f883ff50e1e7dfa19dee2625d545744e6e`	deobfuscated-js	annotation-subject callee-key decoded JavaScript at offset 0x357	5071 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.