PDF malware analysis — malicious · f1c0cfb80cc7de9d

MALICIOUS

PDF

12.0 KB

MD5: 16afe09473d0c2d721a304d620e25643 SHA-1: 333aa813268bfe057609b65bcec6ba015e36986c SHA-256: f1c0cfb80cc7de9ddef287ac801cbb3c415dedf09bae98e87f7d2cc0125a9b38

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious Link/URL

The critical heuristic CVE_2007_5659 indicates the exploitation of a known PDF vulnerability using JavaScript. The presence of embedded JavaScript streams and deobfuscated JS files further supports this. The ClamAV detection 'Pdf.Exploit.Agent-36065' confirms the malicious nature. The embedded JavaScript likely downloads and executes a second-stage payload, though the exact mechanism is not fully detailed in the provided heuristics.

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.Exploit.Agent-36065 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36065
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` `9c67560e8c63b720885d3efc1627b844b86a6ec08e99e5b65a22eae832045756`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19C	431 bytes
`legacy_pdfkit_stage_000.js` `dc457ebcb884cbfbe07cdf32fa08d23431a6ca66e155a8f5e7f6c43d156c39e7`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12447 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `cd884ccae4a4a95d5618ea33e9834cafd0a8fc40b84bae97a3431f5383b8255b`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5131 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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