PDF malware analysis — malicious · 9a6d1d85907de17f

MALICIOUS

PDF

407.0 KB Created: 2010-04-23 15:05:32 +08:00

MD5: 20139d4a49e54c23e24e621dfdaa4c8f SHA-1: 75cdfe3e38c8d5156e2f2452b744e58f4e80013f SHA-256: 9a6d1d85907de17ffc656145ea534a8327bd09acbcf59304920c6e835c5cb399

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.003 Windows Command and Shell T1059.007 JavaScript/TypeScript

The PDF file contains embedded JavaScript with multiple eval() calls, indicating an attempt to obfuscate malicious code. This script is likely responsible for downloading and executing a second-stage payload. The presence of embedded files and JavaScript actions strongly suggests a malicious intent, though the specific family could not be determined.

Heuristics 6

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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. (matched inside decoded stream)
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. (matched inside decoded stream)
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload (matched inside decoded stream)
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.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://ns.adobe.com/xap/1.0/
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/pdf/1.3/

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_002_off000003ab.js` `f00bbb4beac4c491d7a53ea5754b680ce82ef92560829bd342d4c91d6b39e7f2`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3AB	11427 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`objstm_0039_00.bin` `d2cb6adec007a0ba677390ab67f8a0f3cbbaf2a8ce573a81032f806c8026666f`	pdf-objstm-decoded	PDF /ObjStm 39 0 obj (inflated)	3976 bytes

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