PDF malware analysis — malicious · 41183a978a0c783a

MALICIOUS

PDF

7.7 KB Created: 2014-12-25 19:37:19

MD5: e7a2a56414e45c8f0e563b533da2baf1 SHA-1: 72db049d2a8a5284ada93bc656b001015fb8f895 SHA-256: 41183a978a0c783aab70478314e48eab26595cc2b2c1da0d65e39c870ea4da97

62 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains an embedded JavaScript payload, indicated by the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' heuristic and the presence of 'stream_002_off00000f2b.js'. The ML classifier strongly flagged this PDF as malicious. The embedded script is likely designed to be executed, leading to a malicious action such as downloading a second-stage payload. The document body text is largely nonsensical and truncated, providing no clear lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 3

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.
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_001_off00000640.bin` `cec8461a308206bbe035fedcd53ba1b828f8f216fd659e41a7cfec8233ac07dd`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x640	2182 bytes
`stream_002_off00000f2b.js` `518f362fb21f92f89274efe11b08e4d386b0884202fef8ba5aa042dbee6e620e`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xF2B	8283 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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