Malicious PDF — malware analysis report

Static analysis result for SHA-256 545f54a9041fdfd5…

MALICIOUS

PDF

44.7 KB Created: 2020-10-19 03:41:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 9daa6af9e0fec2794d027a5cbd34e058 SHA-1: 7a704cd3cbe1d3ece64295b44be0573e970d2450 SHA-256: 545f54a9041fdfd518d6d1a86aaa1ea071a76d1858478c9cd04844fb26407547
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/123?keyword=yamunashtak+in+gujarati+pdf+to+read In PDF document text
    • https://tenagudewujuga.weebly.com/uploads/1/3/1/1/131164273/wibudolalamatix_fuxetokama_mopivulit.pdfIn PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/japixatuvov.pdfIn PDF document text
    • https://viwuwobigoku.weebly.com/uploads/1/3/1/3/131378942/95a8c6dd29eb32.pdfIn PDF document text
    • https://soxajenukaru.weebly.com/uploads/1/3/0/8/130874283/4acdd603355274.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/9b18cd795bd.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/3532345.pdfIn PDF document text
    • https://dosaremuxabibi.weebly.com/uploads/1/3/0/7/130739916/vimeboki-vobubenovaz-pipavetu-xogepux.pdfIn PDF document text
    • https://lejigatoni.weebly.com/uploads/1/3/1/8/131871980/8b752a6ab4c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/a9359e25-c129-4fef-8586-988746ce7699/rugesubi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76c99966-8bd8-4dad-b4ca-d55b7d78e355/10338280603.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e69edffe-cd79-4f71-8432-8dd7164f3d65/sokujadamufujumomopukon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/487dbf3c-64a5-4587-8b77-0cab7604666e/keditareluwusitaxadafe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0467/9752/1047/files/91099656536.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6093/1991/files/20_amino_acids_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9754/6663/files/84416949654.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4974a5d6-ddec-4811-87d9-70ab0452ddc9/reperawakadogopabumo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b9cef9d-a005-4004-b318-cef5a8e6035a/naginubufupowinezisanabeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a61ec2a-3541-4141-84f1-4b6f006c0dbb/juvagapejaxemudu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0e4c6a5-2173-41d4-9958-7950a918aff2/xogugisa.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_off0000634c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x634C 5408 bytes
SHA-256: 85d4df15e5dd6498a877056016224d4c8163f44dd9d19a176c6e142eccc6acc5
font_01_sfnt_off0000757f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x757F 9964 bytes
SHA-256: 5df200c18665ebfa2dbac34db6aa82bfd731a6ce2aff7b4b850929d039d5593c
font_02_sfnt_off00009788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9788 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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