PDF malware analysis — malicious · dd5f09512d322f46

MALICIOUS

PDF

12.1 KB

MD5: 9cf0f7a4779182d59c5824671654fe81 SHA-1: 9f2845907e5f28f75825b635e36e8313fe38fcf5 SHA-256: dd5f09512d322f46764d8da4a09e14c181c7ec1d500fa52d0dafadfa9547e10b

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. A critical heuristic, CVE_2007_5659, indicates the use of a specific exploit targeting the Collab.collectEmailInfo method to execute JavaScript. This JavaScript is likely responsible for downloading and executing a second-stage payload, as suggested by the extracted files 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js' which show script obfuscation indicators. 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` `ecc7309cb340cec071a88b3094845c9a9cd67d40cbcce609d000bf7fc4fb7c9a`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12304 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `7843dbc070b58873584a221950f9fc78aaa39472c35a63802e75e6271dc8331a`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5135 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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