Malicious PDF — malware analysis report

Static analysis result for SHA-256 80367d1581481a9c…

MALICIOUS

PDF

3.0 KB
MD5: ab4670ba0e80ff11de0b6d0695e883f1 SHA-1: 715ebf3812afa00232e48ab1ab5289b2c3fd6553 SHA-256: 80367d1581481a9c66b09db739885ac50c6f049725a14618137bc76b32ce73da
148 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains obfuscated object names and is flagged by ML classifiers and ClamAV as malicious, indicating exploitation of a vulnerability. It also contains an embedded file, likely a second-stage payload. The presence of XFA forms and embedded files suggests a potential attack vector leveraging these features for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
  • Hex-obfuscated structural name object high PDF_OBFUSCATED_NAME_OBJECT
    A structurally-dangerous PDF name (e.g. /OpenAction, /Launch, /AA, /EmbeddedFile, /SubmitForm) is written with #XX hex escapes to evade string-based scanners. Legitimate producers write these names literally; hex-encoding them is a deliberate obfuscation technique.
  • 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
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xci/1.0/
    • http://www.xfa.org/schema/xfa-template/2.4/
    • http://www.xfa.org/schema/xfa-data/1.0/
    • http://ns.adobe.com/xtd/
    • http://www.xfa.org/schema/xfa-form/2.8/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0001.bin
51e8496436a1a58a21f20fa66b33a76949d5921c1220296517aaf73ca5d2e3bd		 pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x88 13584 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.