PDF malware analysis — malicious · 3ecab910b48014b6

MALICIOUS

PDF

5.2 KB Created: 2012-06-11 17:19:01 Authoring application: m4RG

MD5: dae6d67965a04f96979ba968f21b1e53 SHA-1: e083cd65dcb79194aa599b4c12553c5d147efec3 SHA-256: 3ecab910b48014b6a56fde83c1bfb4dee0391c6b948e641703e03c199cb48177

72 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 JavaScript

The PDF file was flagged as malicious by an ML classifier with high confidence. Static analysis revealed an embedded JavaScript file, which is a common technique for delivering secondary payloads. The embedded script is likely responsible for the malicious behavior, although its exact function could not be determined due to obfuscation.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

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
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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
`stream_002_off00000319.js` `7090aeeeb7e9350c7b1278449c6656aae3765f466478e730661b4dbb6cf73133`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x319	60957 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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