PDF malware analysis — malicious · f4855b80ae4d636b

MALICIOUS

PDF

12.4 KB

MD5: 113707a9c6a66512a565ef369a95f4e1 SHA-1: 7968b8891c4b3d37691f227c86656ce9c6da6d1e SHA-256: f4855b80ae4d636be36c0556b8605b483027b09a241d81cf4092dfe55845b56c

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. Critical heuristics indicate the use of CVE-2007-5659, specifically exploiting the 'Collab.collectEmailInfo' function to execute JavaScript. This JavaScript is likely designed to download and execute a secondary payload, as suggested by the presence of deobfuscated JavaScript files and the ClamAV detection signature 'Pdf.Exploit.Agent-36062'.

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` `90ff1728028ff057e76c7c70edf21258c317f6c25e77a8b922246df66779bbcf`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12329 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `de77b73f88246ce36e1f313633ca3841a4e1e3a4fe3c7fcae0f659948b243f43`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5144 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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