Malicious PDF — malware analysis report

Static analysis result for SHA-256 87341612b0dc6122…

MALICIOUS

PDF

69.9 KB Created: 2020-11-08 23:49:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: dbb30075dce45296e5580c2ef38a434b SHA-1: df2f6033b1697c0d79f82a19d2696180010ba10d SHA-256: 87341612b0dc61228096696ff844123928332c765475eae490485e247e5897b9
66 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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/123?keyword=trek+8300+sl PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373986/normal_5f89efee0b68f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372371/normal_5fa5004c198af.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://rezekine.files.wordpress.com/2020/11/tatojesanawav.pdfIn PDF document text
    • https://givolajokofe.files.wordpress.com/2020/11/japatewajaliwififu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd332801-691a-484a-a60b-3448650921ca/how_to_tame_a_wild_tongue.pdfIn PDF document text
    • https://vabavoresadi.files.wordpress.com/2020/11/debewasomogoro.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/sigipapuxa.pdfIn PDF document text
    • https://fefitaw.files.wordpress.com/2020/11/64939725781.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a41bd657-9ba5-4d2e-8323-cdeb71389c5d/calculus_stewart_answers_8th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f79b8550-7602-4863-8a4f-f3cd48605f48/canon_pixma_mg2520_user_manual.pdfIn PDF document text
    • https://kufotukir.files.wordpress.com/2020/11/rafubaf.pdfIn PDF document text
    • https://tevarew.files.wordpress.com/2020/11/88608638079.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_off0000c85a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC85A 4424 bytes
SHA-256: 6e3767edc14841bed865c959363d15c8de4fe53e32455753093d615d77a654d1
font_01_sfnt_off0000d75f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD75F 10860 bytes
SHA-256: 5c2c25cfe5cb1eb3c9cc979c0d28ad2b01f233f9439aa4d47cfa30ca60d48a24
font_02_sfnt_off0000fc98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC98 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176