PDF malware analysis — malicious · d316f4b94988e3a9

MALICIOUS

PDF

12.5 KB

MD5: 1d2653a502e39fe7b4bdda3735cf2d0d SHA-1: c3fd15ce9f8696373ec702c1616873c556d44aae SHA-256: d316f4b94988e3a974606a8ce19d602a76cd0c99c3ac1349b0d9a1d99d8d38bb

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that exploits CVE-2007-5659 using the Collab.collectEmailInfo method. The heuristics indicate that the JavaScript is obfuscated and likely intended to download and execute a second-stage payload, as suggested by the extraction of deobfuscated JavaScript files. 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-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` `1cc4329b3f0ed88d05c0d4ba7dcc975e661e3581b8b3d06ec42467397fbeb278`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12211 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `8381cf191ab42d312fab42e7762a91b954b49f59ad6d18f7d5e2e5ca4527400c`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5060 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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