Malicious PDF — malware analysis report

Static analysis result for SHA-256 29897b4aaded88e5…

MALICIOUS

PDF

105.8 KB Created: 2022-06-24 10:44:07 Authoring application: Workplace Violence Training Certification physics (via FPDF 1.82) First seen: 2022-07-15
MD5: 2f569da0e9de3dbbe0d96e5992683ef0 SHA-1: 5058c95a89d58ef29c69053f4e9ca78174dfe25b SHA-256: 29897b4aaded88e56ce0a62be0461818629f1e58eaea91f70cabccf30567290c
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains multiple embedded URLs, with a critical heuristic firing indicating repeated invisible links designed to lure the user to download a payload. The primary malicious URL identified is http://encodersmature.site/Workplace-Violence-Training-Certification/pdf/www.fbfloans.com, which likely serves as the distribution point for the secondary stage malware.

Machine Learning

  • Nyx PDF Classifier clean score 0.0007

Heuristics 2

  • Invisible/repeated PDF links deliver payload file critical PDF_REPEATED_PAYLOAD_LINK_LURE
    PDF uses invisible link annotations and points to a direct payload download. Repeated invisible links or lure-like payload names such as document/unlock/verify archives match malware-delivery PDF carriers where the page is only a prompt and the real payload is fetched from the linked URL.
  • 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://encodersmature.site/Workplace-Violence-Training-Certification/pdf/www.fbfloans.com
    • http://encodersmature.site/Workplace-Violence-Training-Certification/doc/www.fbfloans.com
    • https://www.fbfloans.com/wp-content/uploads/formidable/3/link-utilization-go-back-n-protocol.pdf
    • https://www.fbfloans.com/wp-content/uploads/formidable/3/jackson-county-paid-personal-property-tax-receipt.pdf
    • https://www.fbfloans.com/wp-content/uploads/formidable/3/testimonials-red-yeast-coffee.pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_015_off00019bfd.bin
43b13684882d332187dbe2691d5e4f64c33a98e381a4dc2316374ba1b923b47c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x19BFD 76950 bytes

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