PDF malware analysis — malicious · 42a77ed82898fdb4

MALICIOUS

PDF

12.7 KB

MD5: 8284791bedb5eb754fdd384873e6d647 SHA-1: ba80e38c523f1f4e362175df357075fdf709f09b SHA-256: 42a77ed82898fdb47bc73e4c01b95466ef5930b904e99e8f297175f1b0a58447

138 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability via the Collab.collectEmailInfo method. This JavaScript is designed to download and execute a secondary payload, as indicated by the presence of deobfuscated JavaScript files and ClamAV's detection of Pdf.Dropper.Agent-9477740-0. The exact download URL or execution details are not directly reconstructible from the provided evidence, but the pattern strongly suggests a multi-stage attack.

Heuristics 5

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)
ClamAV: Pdf.Dropper.Agent-9477740-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-9477740-0
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` `dd1c08d3b928537bd59da84e39874a878352bcfa2364e1d152c584ab1d2f13af`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	12387 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `2fd269cb73f00b7f1dd71af83de6b3d3fddfbf72c0af22b6dadd139e07637123`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	5100 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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