PDF malware analysis — malicious · cf85eb53105fa722

MALICIOUS

PDF

7.4 KB Created: 2012-08-04 17:40:47

MD5: f22aba1c171d5c03ff14267204aea96c SHA-1: aa3f16ce9a7cfe69b31d7500020f87c6da95068d SHA-256: cf85eb53105fa722c0a1fffd46eeee8f44d645c9beb864c06a18a42e87987f9f

68 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1027 Obfuscated Files or Information

The PDF file was flagged as malicious by an ML classifier and contains an embedded script payload. The presence of an embedded file and script suggests an attempt to deliver a secondary malicious payload. The document body appears to be obfuscated or corrupted, preventing a clear understanding of its lure, but the technical indicators point to a malicious dropper.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0011.bin` `2fdbd8d754c282b17a4ca9dd7e56217d918f554029021f0b989dcfbd5c0fbd16`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0xB97	6910 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 long base64-like blob(s).

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