Malicious PDF — malware analysis report

Static analysis result for SHA-256 75d8475713d6c35e…

MALICIOUS

PDF

9.3 KB
MD5: b19e13376d996e141689ce76753e2b72 SHA-1: 8b219ea6d5909d706dbfd298fbbf4a292fb5849e SHA-256: 75d8475713d6c35e5118bd60581475c2715823bfb76faa1f30523fab94d28b59
152 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating it contains exploit code. Heuristics identified obfuscated object names and an XFA form, common in malicious PDFs. The embedded artifact 'stream_000_off0000007e.bin' is likely the exploit payload, suggesting the PDF's purpose is to download and execute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9550

Heuristics 7

  • ClamAV: Pdf.Exploit.Agent-22339 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-22339
  • 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 (matched inside decoded stream)
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PSEOF. 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.
  • 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
stream_000_off0000007e.bin
8217b611f2f61809890382d8659f8b2d1ae3f4d8d17c7730a0a7efbd19637a6d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x7E 13408 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).

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