Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcba476f0c3ce40e…

MALICIOUS

PDF

49.8 KB Created: 2020-11-08 02:47:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 1f6ef66dc76e552b1b19f6d2cb8b2bfa SHA-1: 134316671a8ffb7947469a98078fa821facbf8ac SHA-256: dcba476f0c3ce40ecdb2efefab43d88be1422494881b278857cac2dbd99c7651
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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
  • 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/aws?keyword=ispoofer+pogo+ipa+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4423471/normal_5f9d93a208501.pdfIn PDF document text
    • https://zapilututok.weebly.com/uploads/1/3/4/3/134341349/puropojerizowuz.pdfIn PDF document text
    • https://zafitageleg.weebly.com/uploads/1/3/4/4/134489703/3156904.pdfIn PDF document text
    • https://redunexodozik.weebly.com/uploads/1/3/0/8/130814050/5188109.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371790/normal_5f8c6c6223c53.pdfIn PDF document text
    • https://zuxutupod.weebly.com/uploads/1/3/4/5/134587355/b933f.pdfIn PDF document text
    • https://kogemujifogez.weebly.com/uploads/1/3/4/3/134344524/9640417.pdfIn PDF document text
    • https://latijivetazemor.weebly.com/uploads/1/3/0/7/130775002/2c7ed7280b2.pdfIn PDF document text
    • https://riramiseba.weebly.com/uploads/1/3/4/3/134369938/9048997.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://xoruxosaj.files.wordpress.com/2020/11/6518121005.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/subtracting_linear_expressions_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73c63c18-2eed-4d31-ac59-1d396d873931/67524203667.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a961dd7f-7dd9-4a2c-aed4-a30bf770cd10/95331498089.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007bc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC0 2960 bytes
SHA-256: ba9dd86ad06677ef82b9fc66565cbe1db364e5caa8fb73f24ce3e10b7ab9a08b
font_01_sfnt_off00008643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8643 5236 bytes
SHA-256: 4f420cc0ee2b4dc75e1207da87cbaa1a1c522b69884a79a25401e8e90b364d2e
font_02_sfnt_off00009835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9835 9876 bytes
SHA-256: 1fed90ecbed210e0b0a4c4844ce0262658cdd5b9138bebd9722b5ce076f33407

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