PDF malware analysis — malicious · cefeb6fb651ddfa8

MALICIOUS

PDF

7.9 KB Created: 2008-08-19 12:14:36 Authoring application: avast5CJ

MD5: 07af88f6d589039e6fc1dbdf630f7d98 SHA-1: 25efe1b285c99d3e446fb350f0ed28e9b3e5fe46 SHA-256: cefeb6fb651ddfa8d9a467c08f88444d7f3f992b67e98f623ffbd995b2726135

68 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious File T1027 Obfuscated Files or Information

The PDF exhibits multiple indicators of malicious intent, including embedded files and a high-confidence ML classifier score. The presence of an embedded script payload suggests it is designed to execute malicious code. The primary function appears to be the delivery of a secondary payload, indicated by the embedded file 'embedded_file_obj0012.bin'.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

Embedded script payload in PDF stream medium 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.
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
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 7

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0008.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0x21C	84 bytes
`embedded_file_obj0009.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x2CD	228 bytes
`embedded_file_obj0010.bin` `ea557c213487f9bffa642b5956df013494d168386a784ffbe0fb7839fd0c9c30`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x3BE	1734 bytes
`embedded_file_obj0011.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x71D	199 bytes
`embedded_file_obj0012.bin` `0db5b15ae5c20246a0a98b8fb5c6f84f9d706b03c3ae90b45a548fcdcf1aaa45`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x810	123206 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`embedded_file_obj0013.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0x1B20	77 bytes
`embedded_file_obj0014.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x1BC8	56 bytes

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