PDF malware analysis — malicious · 585f5f8a9c035b3b

MALICIOUS

PDF

12.7 KB

MD5: 20747b1ded97196c5b46af093b3c1d97 SHA-1: 9552d515a88af5de4f18b256076fa6ae7a8c9ee8 SHA-256: 585f5f8a9c035b3bebabaefbd07f344d0ebcbbc342dca613ae459fc65531964e

78 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, triggered by the 'Collab.collectEmailInfo' method, which is associated with CVE-2007-5659. This exploit is designed to execute arbitrary JavaScript. The extracted JavaScript files, 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js', suggest a multi-stage process likely involving the download and execution of further malicious content. The document body is unreadable, but the heuristics strongly indicate an exploit delivery mechanism.

Heuristics 4

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)
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `1847af0a099665b6ac45af66402e56ed64237a1b287618ee3d6643267fda6f35`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	343 bytes
`legacy_pdfkit_stage_000.js` `83cb555c658fe8f4127aa0746174a9f9b6c40eb9cec9c1525fb1845b70eeede0`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	12370 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `9d812d8c01a94bf6bc728d004ee6949938083279bcb78ffdfd49224c70bbc0bd`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	5170 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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