PDF malware analysis — malicious · 5ffd4f5fd7f4682a

MALICIOUS

PDF

29.1 KB Created: 2010-08-29 16:19:36 Authoring application: Jzgtobsmbmvtipz Clgvqxqrp

MD5: acb59729adf7acf979fadb8229fd0f88 SHA-1: 1b54c5d267a5914efe9c78869db0e061a60662c3 SHA-256: 5ffd4f5fd7f4682a1c2f25293ca07249ece1a0f8eb20f555027e44789d75906c

158 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains embedded scripts and triggers a high-severity heuristic for eval() calls, indicating malicious JavaScript execution. The ML classifier and ClamAV detection strongly suggest this is a malicious PDF designed to exploit vulnerabilities and download a secondary payload, likely contained within the large embedded file 'embedded_file_obj0011.bin'. The benign URLs present do not detract from the malicious indicators.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 7

ClamAV: Pdf.Exploit.Dropped-81 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Dropped-81
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
Embedded script payload in PDF stream low PDF_EMBEDDED_SCRIPT_PAYLOAD

PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
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://ns.adobe.com/xfdf/
- http://www.xfa.org/schema/xci/1.0/
- http://www.xfa.org/schema/xfa-template/2.5/
- http://ns.adobe.com/xtd/
- http://www.xfa.org/schema/xfa-data/1.0/
- http://www.xfa.org/schema/xfa-form/2.8/
- http://ns.adobe.com/xdp/

Extracted artifacts 8

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0015.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 15 at offset 0xA5	77 bytes
`embedded_file_obj0010.bin` `43c7058340baaafeb868ac12aab8aeece514487988a9e91f516436205e0d9799`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x1F2	559 bytes
`embedded_file_obj0009.bin` `f71de64fbd4d5df8c59e5f3a6eb6c0ec2b6f82cf369f26f15812ace2276ca475`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x465	292 bytes
`embedded_file_obj0012.bin` `a5bffafabc1888cfb6bd349380f7cb66d97de140705778ab94fc6814a3c0b3fe`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x61D	382 bytes
`embedded_file_obj0014.bin` `780dd94fcae39189850b2fd6339b39476069ebd5510c30c5f559072952c4d81c`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x840	157 bytes
`embedded_file_obj0016.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0xAC0	56 bytes
`embedded_file_obj0008.bin` `04462f810d6eacdacecc9d0a5f3f81bebc722af4415e04da19b520338f642b51`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xB6E	67 bytes
`embedded_file_obj0011.bin` `42b84cb7e0872f886ee0d214afb0124ad1b5ba73a4abfc7b2bcfa28d7ba2f5c5`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0xBF6	26462 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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