Malicious PDF — malware analysis report

Static analysis result for SHA-256 71f290281b3d838f…

MALICIOUS

PDF

44.2 KB Created: 2020-10-23 16:02:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: c44ef8741f6186e3d985e3d2d196054d SHA-1: 43e46babb4e26a180259d471cd5db824eb18bb0c SHA-256: 71f290281b3d838fd9d6ffd75274ed334956c664ce0d9cec85e7484c3782c51f
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://ggtraff.ru/strik?keyword=free+download+rudrashtakam+rameshbhai+ojha In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365635/normal_5f8d58cf435d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5f8de78df128c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366652/normal_5f91113c98c40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376375/normal_5f8f645ab54ae.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/3509862.pdfIn PDF document text
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/zalawumavujiv.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/d9d34.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005834.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005834.bin)
    • https://uploads.strikinglycdn.com/files/ed7a721d-44e1-4b58-860e-e486ae6c81c6/21999163819.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6818d671-17cb-4b66-a3aa-904b88a59aaf/2598655916.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72bad5c9-c9ce-4287-83fd-ab611d0834b0/64797854124.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8e5e7db-0945-479a-b8bd-f33012367ff3/1327685203.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af3f3506-bee7-4279-a54f-0d8d098a7471/72011004761.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5023/7604/files/kotasubudenaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9317/9550/files/58423513643.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7481/8726/files/turbo_pascal_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8494/6850/files/piwelene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2174/5823/files/police_interview_questions_and_answers_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/batoruvegidavatirexa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5589/2630/files/71735923674.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn extracted file (font_00_sfnt_off00005834.bin)
    • http://dejavu.sourceforge.netIn extracted file (font_02_sfnt_off00008f05.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_02_sfnt_off00008f05.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5834 5392 bytes
SHA-256: 6c95e81ac03b09d69c643cafcea792bcf1f5114aa61cabc8e6005e67ae022390
font_01_sfnt_off00006a72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A72 10852 bytes
SHA-256: c58ccf2ac355e20e85c6b7830321558742075740dcfe40fdc42f72719c952889
font_02_sfnt_off00008f05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F05 18776 bytes
SHA-256: 1df41416ece054d3cca32f135e48dc95f4d9c8a2bff4ba4edba1d14e21aabef6

Open this report in the interactive analyzer, or submit your own file for analysis.