Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c880b655b2767d0…

MALICIOUS

PDF

43.4 KB Created: 2021-06-06 02:53:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 37a7f72f10967632c0b614462036ed91 SHA-1: 00c6d92c104307aab4e6043a16fd9dc4312b20ba SHA-256: 3c880b655b2767d053b1b0367e876cf564e4b56ceca731e7b7f008255624bf05
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8148

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://crysiq.ru/pbw?utm_term=how+did+humans+discover+dinosaurs PDF link annotation
    • https://ranepudanaliv.weebly.com/uploads/1/3/4/0/134000181/6664669.pdfIn PDF document text
    • https://xajovulunama.weebly.com/uploads/1/3/4/0/134096198/demogegezenowib.pdfIn PDF document text
    • https://nirawulef.weebly.com/uploads/1/3/4/3/134324477/2628816.pdfIn PDF document text
    • https://waluxine.weebly.com/uploads/1/3/4/7/134759732/zujilu_bubejimenuru_jikesizez_sopojiwipawudax.pdfIn PDF document text
    • https://topemarepebide.weebly.com/uploads/1/3/4/3/134316461/5b0614733.pdfIn PDF document text
    • https://rofewonopanofav.weebly.com/uploads/1/3/5/3/135312507/6400720.pdfIn PDF document text
    • https://vubenazago.weebly.com/uploads/1/3/4/3/134357699/xepamatenom_rugaselu_nidoj_wumudozepidoxat.pdfIn PDF document text
    • https://takisulajedeviv.weebly.com/uploads/1/3/7/5/137501155/944c1911388c.pdfIn PDF document text
    • http://xedidovetaw.pbworks.com/f/34747599122.pdfIn PDF document text
    • http://tikomegeto.pbworks.com/w/file/fetch/144566736/70032285075.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dcffc69-761e-4aed-844a-824d9e59134d/dedifafuvi.pdfIn PDF document text
    • http://dufogeruzipu.pbworks.com/f/10th_class_physical_science_textbook_ap.pdfIn PDF document text
    • http://jabodawo.pbworks.com/f/68230287191.pdfIn PDF document text
    • http://zajozote.pbworks.com/w/file/fetch/144443763/pokemon_emerald_for_gba_rom.pdfIn PDF document text
    • http://ronefete.pbworks.com/f/how_to_fill_out_a_fax_cover_sheet_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8aac8cec-55bf-45c2-ac8d-cfa1ae16907f/what_type_of_poem_is_the_passionate_shepherd_to_his_love.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5f0a71d-1a8c-45d9-bcc6-8a2721511ea8/xovewap.pdfIn PDF document text
    • http://jizakatum.pbworks.com/w/file/fetch/144637740/flight_movie_dual_audio_480p.pdfIn PDF document text

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