Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f72cfd9442b6817…

MALICIOUS

PDF

34.2 KB Created: 2020-10-10 19:03:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 9a97bd6f3d639134de0d96446b87394d SHA-1: d3560efc34da6842d7161e6233d62ff6c98d817b SHA-256: 0f72cfd9442b6817b1b3f3cbce46f4dcd62d9ae37b648f522c25ef2cb894adfa
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://cctraff.ru/strik?keyword=luby%2527+s+cookbook+pdf In PDF document text
    • http://files.vancoschool.com/uploads/1/3/1/0/131071289/wukibe-welolutowiji-xemajuganamuv-rebusi.pdfIn PDF document text
    • http://files.masterpieceonlineacademy.com/uploads/1/3/0/7/130775429/6051246.pdfIn PDF document text
    • http://files.tyvanwagnerforsheriff.com/uploads/1/3/0/7/130775759/4872594.pdfIn PDF document text
    • http://lolube.tampapanhellenic.com/uploads/1/3/0/8/130874330/2d3986.pdfIn PDF document text
    • http://vipomog.egypta.org/uploads/1/3/1/4/131453698/vugedevavozebaxikav.pdfIn PDF document text
    • http://zavedazet.shannancalcutt.com/uploads/1/3/1/6/131606490/bd002678.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/005a260f-4a15-433d-bd6f-9b08001d4299/rogelepewowugoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65017fd8-cb06-4b12-9891-379a611c3499/bafumo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc8d9df0-5ca2-4a96-a079-9a5987f9b0cd/wunuroribenor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3fa648e-7dad-4bc5-9627-715d6df742ef/dagenawizovadusunorus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f2d7d83-127e-4564-9233-d4215f93c7c9/tuwuzovopiwabuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10e75302-26fe-4c66-83ef-c308ca5be504/84975279474.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e466a75-e86c-420b-bf0c-695256b1a419/3684898839.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 6

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000470d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x470D 5092 bytes
SHA-256: ac8e982578d250fce7bc2d1e4e6a8be7f2b90ec87150974c5fdc1e7a6b9b50e9
font_01_sfnt_off00005883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5883 10576 bytes
SHA-256: 50bc0c5b8b54026a8b57f3435f2fd296d7b9303a84af6762c5e993213d395638

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