PDF malware analysis — malicious · bd3cc2150b6f3a85

MALICIOUS

PDF

12.9 KB

MD5: 2b774bc8c691e873fa69f7dabd0341af SHA-1: 80b08dac6d549a4911c8b24373ef8675dad3ed6e SHA-256: bd3cc2150b6f3a854d578fc900f3444b7e7e1307eef5ea0d013d66d0c372b982

140 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The critical heuristic CVE_2007_5659 indicates the exploitation of a known vulnerability in PDF documents using JavaScript. The embedded JavaScript streams, particularly legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, are indicative of a dropper mechanism. These scripts are likely responsible for downloading and executing a secondary payload, a common tactic for malware delivery. The ClamAV detection further supports the malicious nature of the file.

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-7217219-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7217219-0
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` `3d02b54863c14128e346de51222a0f628c028972e577da7a01ac5ad6a2df8e50`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	12646 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `3aead71c98837197d7e7db87781192bbeb52ff382b6976dbabf47f6692021ba6`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	5212 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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