Malicious PDF — malware analysis report

Static analysis result for SHA-256 f624534951507f16…

MALICIOUS

PDF

42.0 KB Created: 2020-09-30 15:07:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 472e2955728f92c78a8263c71f6f37d4 SHA-1: e4c234e4d1d16d41abb5302139db979e91aa350a SHA-256: f624534951507f16b8f8013f17fc6d3dc6084f506e9c39008c0c270d338efe3a
184 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.
  • 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.
  • 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://ggtraff.ru/strik?keyword=beat+it+solo+pdf In PDF document text
    • http://files.custom-installation-2020-vision.com/uploads/1/3/1/6/131606890/4554416bb7858.pdfIn PDF document text
    • http://devulifek.poppyavenueboutique.com/uploads/1/3/0/7/130775403/fapunamilubirufubegi.pdfIn PDF document text
    • http://mogiji.senaonmyrtle.com/uploads/1/3/0/9/130969162/a4fb7c7d0.pdfIn PDF document text
    • http://nivuwipad.sportslabintranet.com/uploads/1/3/1/4/131453449/e46c309221244.pdfIn PDF document text
    • http://savewi.corpsefeed.com/uploads/1/3/1/4/131482975/741ca5e58.pdfIn PDF document text
    • http://wuzuja.thedemeterfoundation.com/uploads/1/3/0/8/130814017/ralubirepe-monetugo.pdfIn PDF document text
    • http://pomese.rosiefowler.com/uploads/1/3/2/6/132695306/sosuf_fatus.pdfIn PDF document text
    • http://files.tunesontuesday.com/uploads/1/3/1/4/131409463/e210efd680.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/55d45730-fe0f-4a3f-8839-f5a9386feefe/79301786703.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad0260b0-8491-4db3-9517-c36bd0d4fe73/masodenisufotagorojigaza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dc7a28d-a655-4362-80d2-8b7b3249cdb2/masuto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94de06be-68a5-4191-8c99-c15fdd7f97ee/turuzazepotavez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/69054889036.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5186/7557/files/compreendendo_o_behaviorismo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7846/7238/files/reformed_baptist_churches_in_ga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1018/5621/files/neural_networks_and_back_propagation_algorithm.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_off00006642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6642 4988 bytes
SHA-256: 800df07c9ab17d983c465bc9fc9d33846857978f8c8a601a7aecc84ded677c53
font_01_sfnt_off00007754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7754 10628 bytes
SHA-256: bbfc4f55e38346dde5ecff23ccad7f01e3b75968b06c0dc75c6a47201d9bd589

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