PDF malware analysis — malicious · 8c113f3a46ca0b1c

MALICIOUS

PDF

12.4 KB

MD5: 3a7af708a88988b5cceac7985d306fec SHA-1: a3573d3bf36a0bdfdefccad6b94a89d24901a5ef SHA-256: 8c113f3a46ca0b1c34bd4d966d5ee11fb1b007a9430152ea688fd346e2a5b7fe

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2007_5659 heuristic indicates the exploitation of a known PDF vulnerability (Collab.collectEmailInfo) to execute this JavaScript. The presence of deobfuscated JavaScript files (legacy_pdfkit_stage_000.js, legacy_pdfkit_stage_001.js) and the ClamAV detection (Pdf.Dropper.Agent-7280826-0) strongly suggest this is a dropper mechanism designed to download and execute further malicious content.

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-7280826-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7280826-0
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` `6f6f16913a1de636d4c98ad3a301934530379fea859a0adacca951dd281975ec`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	12075 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `ac60ad0a85150c9bd67cd93a8a9304abe79f671bf9fab0568ce29617357e630e`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	5017 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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