PDF malware analysis — malicious · 3a5effae693afa9e

MALICIOUS

PDF

12.3 KB

MD5: a208b3f189a473184cfd55cf72a9176e SHA-1: f8a5906e2b199d5a98abc8845e5ade6ff9e38fc2 SHA-256: 3a5effae693afa9e63729f1eb9902a647b5baf5b58a204c78555db26cac558ee

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability (Collab.collectEmailInfo). This JavaScript is likely designed to download and execute a secondary payload, as indicated by the extraction of deobfuscated JavaScript files. The ClamAV detection 'Pdf.Exploit.Agent-36062' further supports its malicious nature.

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` `ee56aa2877545572191e4cf2313c5564b66c4f1548b80c7fcf54972f2a0e4e3e`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12011 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `512db01f121fb3d2c1863ce378850f8a68d70d51c01c579be28c4edbc912950d`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4933 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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