Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d872b43c15a3524…

MALICIOUS

PDF

123.0 KB Created: 2022-05-06 16:23:20 Authoring application: Consumer Reports Best Fuel Efficient Cars baseops (via FPDF 1.82) First seen: 2022-07-15
MD5: 598a68b142f4db49faa68bc3781185c0 SHA-1: ef044af326163cb5df23ea16a691ab25b860db3d SHA-256: 9d872b43c15a35242d2b4ae96a471376f60bd6ac6eb2a07ece961bb4e6dc9f21
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains multiple embedded URLs, with a critical heuristic indicating repeated invisible links designed to deliver a payload. The primary malicious URL identified is http://evoscannocd.site/Consumer-Reports-Best-Fuel-Efficient-Cars/pdf/www.oldnewcastlehouse.com. No scripts were extracted, but the PDF structure and heuristics strongly suggest a downloader or dropper functionality.

Machine Learning

  • Nyx PDF Classifier clean score 0.0014

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://evoscannocd.site/Consumer-Reports-Best-Fuel-Efficient-Cars/pdf/www.oldnewcastlehouse.com
    • http://evoscannocd.site/Consumer-Reports-Best-Fuel-Efficient-Cars/doc/www.oldnewcastlehouse.com
    • https://www.oldnewcastlehouse.com/wp-content/uploads/formidable/3/nm-proof-of-service-subpoena.pdf
    • https://www.oldnewcastlehouse.com/wp-content/uploads/formidable/3/colleges-that-offer-animation-courses.pdf
    • https://www.oldnewcastlehouse.com/wp-content/uploads/formidable/3/employee-key-holder-agreement-sample.pdf
    • https://www.oldnewcastlehouse.com/wp-content/uploads/formidable/3/carson-city-look-up-business-licence.pdf
    • https://www.oldnewcastlehouse.com/wp-content/uploads/formidable/3/education-on-resume-for-college-drop-out.pdf
    • https://www.oldnewcastlehouse.com/wp-content/uploads/formidable/3/weekly-kitchen-cleaning-checklist.pdf
    • https://www.oldnewcastlehouse.com/wp-content/uploads/formidable/3/assurant-wireless-insurance-us-cellular.pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_024_off0001df1f.bin
43b13684882d332187dbe2691d5e4f64c33a98e381a4dc2316374ba1b923b47c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1DF1F 76950 bytes

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