PDF malware analysis — malicious · e137cfef38ecf78c

MALICIOUS

PDF

12.4 KB

MD5: a3a85e71d0975c798ded2e0acc7aa5ef SHA-1: c428c502eee2e8a9906184d43cde2a2c3f64f4fa SHA-256: e137cfef38ecf78c4151fedcc8702044984ea14ce1e41fd88437b9d15cf59b2b

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1204.002 Malicious File

The PDF file contains embedded JavaScript and triggers a critical heuristic for CVE-2007-5659, indicating an exploit attempt. The presence of deobfuscated JavaScript files suggests the execution of malicious code. This code likely downloads and executes a second-stage payload, as indicated by the ClamAV detection name 'Pdf.Exploit.Agent-36062'. The extracted JavaScript files are treated as IOCs due to their role in the exploit chain.

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-36062 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36062
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` `068944f8c011a88ab770b45c6de142b9305a1f515d410204d5eadd9ac2b5bfb3`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19B	373 bytes
`legacy_pdfkit_stage_000.js` `29fca9f5c5155c3135aef54726ce1b132357646bb2bf5a3815d496710ddfb3a0`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12141 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `9ce49b0684a88d6385f510a390d456e7f9f5dae4bc06639f13a29671f45752ab`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5099 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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