Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2346a6afa6ece47…

MALICIOUS

PDF

43.8 KB Created: 2020-10-05 00:17:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d9452ddbe7b9abc35585986c7a0c3bd3 SHA-1: fadb9eb689a935d0e7390c05c35eb2bd5bb4ce15 SHA-256: b2346a6afa6ece4753e7496ca42878fa853e9191470255efc1379d58e47fbe8e
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://gettraff.ru/pify?keyword=how+to+mod+apk+2020 In PDF document text
    • https://site-1036982.mozfiles.com/files/1036982/46975700649.pdfIn PDF document text
    • https://site-1039472.mozfiles.com/files/1039472/60001146338.pdfIn PDF document text
    • https://site-1040398.mozfiles.com/files/1040398/34111867256.pdfIn PDF document text
    • https://site-1037905.mozfiles.com/files/1037905/dowedomide.pdfIn PDF document text
    • https://site-1036745.mozfiles.com/files/1036745/89888625212.pdfIn PDF document text
    • http://josaxo.phenomenologyinvenice.com/uploads/1/3/1/4/131483214/3309c5d590.pdfIn PDF document text
    • http://files.mrdavolatech.com/uploads/1/3/1/6/131636644/wesisij_baxenuketu_kokafodavabajep_rululukiser.pdfIn PDF document text
    • http://files.lofos-apartments.com/uploads/1/3/2/3/132303175/ff898a4240.pdfIn PDF document text
    • http://files.nintaiinvestments.net/uploads/1/3/1/4/131437119/951492.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/60349ecb-8d74-4f8b-977c-0919e3f01210/31498706080.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ae07d75-3e7c-44ef-b25a-cd6c6f535174/29981531692.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3764a42a-82d7-4b23-bfb1-8410840281ba/90295979091.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c266d5c5-2450-4aa5-95c5-974791a3faeb/manaxesugevakijovomev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe696a70-8278-4fd1-8cc4-17ae56f50017/doreno.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_off00006b3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B3B 5192 bytes
SHA-256: 3fcc91a7ece14092203e154827998625f2b611709733e3989089e6496d780906
font_01_sfnt_off00007ce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE7 12016 bytes
SHA-256: 31bad94bb3232928b4586be684cbfecbe2943d9dfb343130a22de7344d91b73a

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