PDF malware analysis — malicious · 42267d586b062b6b

MALICIOUS

PDF

7.6 KB Created: 2012-10-03 22:02:31

MD5: fa767906aa18e78e53877811dfa52c7f SHA-1: 7f846276534cda4a5c15a33203b7052e8a239ffb SHA-256: 42267d586b062b6b2690ede13567b84d40719a4518a9a500332935b82200f8b3

68 Risk Score

Malware Insights

MITRE ATT&CK

T1553.005 Mark-of-the-Web Bypass T1204.002 Malicious File

The PDF contains an embedded file, flagged by heuristics as a suspicious payload. The ML classifier strongly indicates maliciousness. The embedded file, named 'embedded_file_obj0008.bin', is the primary indicator of compromise. The document body text appears to be unrelated literary content, suggesting a potential obfuscation or lure.

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_obj0008.bin` `ba2726f3585c8fdd31bc85a5b46fd4a60d085557b9e45fa7486665b6fe23a312`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xCC0	6980 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 long base64-like blob(s).

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