PDF malware analysis — malicious · df4a5fa2bdce106f

MALICIOUS

PDF

11.8 KB

MD5: 14f1b24f3c4299b4cf0e23067fba1d4a SHA-1: 7633a736e6eb99edb80b054d47013c80f8abdb92 SHA-256: df4a5fa2bdce106f964dd30cd83cd2134f810135bddba6568d8ab4a77911e0b6

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/Shell Script Execution T1204.002 Malicious File Execution: User Execution: Malicious File

The PDF file contains embedded JavaScript, specifically triggering the CVE-2007-5659 vulnerability via the 'Collab.collectEmailInfo' method. This indicates an attempt to exploit the PDF reader to execute arbitrary code. Two deobfuscated JavaScript files were extracted, suggesting a multi-stage loading process. The ClamAV detection further confirms 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-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` `aef246a745a5132d5fae711d1e31a6f945a35be3642e9b7d8e64c9bad4b7ce25`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12138 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `c7f95e59ddc7a2d7967623fdc5a2d3a25dee34e8081462508747d39411b6a015`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4989 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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