Malicious PDF — malware analysis report

Static analysis result for SHA-256 53ffea4217add6d5…

MALICIOUS

PDF

101.6 KB Created: 2021-12-11 00:32:14 +03:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2023-12-08
MD5: 4e7d5f6a831abb7a7b125355cfa9f9ac SHA-1: 8dbafb666596a1706645ca87bd92b4b0f2714a70 SHA-256: 53ffea4217add6d5d1a41ca6667522c25c5898c7beadca962ca858ebfce01b2f
99 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.0160

Heuristics 5

  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • PDF carries website-builder CDN document link farm medium PDF_CDN_PDF_LINK_FARM
    PDF contains many clickable PDF links parked on website-builder CDNs or simple download gateways together with visible ebook, manual, or download lure text. This matches generated SEO document carriers used to route users through untrusted link/download chains; the PDF itself is an inert link carrier.
  • PDF links to disposable redirector campaign host medium PDF_DISPOSABLE_REDIRECTOR_CAMPAIGN
    PDF's outbound link points to a throwaway redirector domain that recurs as the sole redirect across a large family of otherwise unrelated spam PDFs (movie-piracy, affiliate, and viral-link lures). These domains appear on no reputable list and exist only to funnel openers into malvertising / scam / download chains.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://getpdf.pw/book?res=123&isbn=9780824826918&kwd=Selected%20Readings%20in%20Korean PDF link annotation
    • https://static.s123-cdn.com/uploads/4663442/normal_61b2cbc04eab2.pdfIn PDF document text
    • https://static.s123-cdn-static-b.com/uploads/4662754/normal_61b30ea80b0c0.pdfIn PDF document text
    • http://getpdf.pw/book?res3&isbn�80824826918&kwd=Selected%20Readings%20in%20KoreanIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn extracted file (font_00_sfnt_off00013967.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13967 22068 bytes
SHA-256: 52bcf574182d5f56addf5bd308719b723eb1d3cc8fd314771540f5ea4737436f
font_01_sfnt_off00016cb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16CB0 18252 bytes
SHA-256: 4162c73ba9cc14974f3188b6297fa1ecc5aadee3373c80a6b987596679d285ec