Malicious PDF — malware analysis report

Static analysis result for SHA-256 793501530f8a3271…

MALICIOUS

PDF

39.2 KB Created: 2020-11-06 03:51:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-15
MD5: 39dfefd857b29fd569eceac8d166df09 SHA-1: 4dbc93093c26c0044905a0540d982e1c308a253f SHA-256: 793501530f8a32715c449acbe579159dedbbbb6511ed8806b7ffb2d7051f7c0f
144 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/123?keyword=preamble+worksheet+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393911/normal_5f905253df119.pdfIn PDF document text
    • https://fezuxikazosulav.weebly.com/uploads/1/3/1/3/131398093/bugoxanifun_rulik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393755/normal_5f94d412e2301.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385020/normal_5f928536b8d85.pdfIn PDF document text
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/vebeferisebolix.pdfIn PDF document text
    • https://xezuzevujuniz.weebly.com/uploads/1/3/4/5/134586082/ccc0a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417406/normal_5f960ec594b64.pdfIn PDF document text
    • https://kakezilek.weebly.com/uploads/1/3/4/4/134401463/9f91000be9a28.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/255fe893-65f3-4de6-a945-14247ff85b31/gigopejudugesiferix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0759d00-5448-4626-ab7f-5e3debc73298/zuxipipexogerizaretem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce859164-8b4a-42a7-a708-43557d380603/nigasokok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5b6df1e-4628-4849-a44a-b194999c9adc/miwukusibatulamir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9504c983-cd5a-495c-854b-fadea9d4bc01/zuzipezegutitalonixofejix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2791b892-d34d-4c09-a0bf-77b55b276bc4/cedulas_de_auditoria.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A0A 5580 bytes
SHA-256: e9586549debbcef5572ef17b89213693e3bbc366dedcc74b4e1be317e4453141
font_01_sfnt_off00006ce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE2 10480 bytes
SHA-256: 72a17615a65803267633a8f2228131afe4082a54e0509f3c85ceb3f3b7456330

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