Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f423a7e748513d6…

MALICIOUS

PDF

41.9 KB Created: 2020-10-02 21:27:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: bdfca93d8195057acee19e863aefa45a SHA-1: e346695d55782da187488430f8c99681aae1d7e8 SHA-256: 0f423a7e748513d6a0d218464b0de09fb3877d1b532a542e532085e479e50385
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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://cctraff.ru/strik?keyword=logic+circuit+questions+and+answers+pdf In PDF document text
    • http://kelegof.aftabhafeez.com/uploads/1/3/2/6/132681352/pubitoboje_xivovibori.pdfIn PDF document text
    • http://files.rachelpagesings.com/uploads/1/3/1/3/131398194/9f32379d8a309.pdfIn PDF document text
    • http://tezuv.mayaoffprice.com/uploads/1/3/1/0/131070213/4258540.pdfIn PDF document text
    • https://site-1038363.mozfiles.com/files/1038363/luroduxotukofibitememaf.pdfIn PDF document text
    • https://site-1037129.mozfiles.com/files/1037129/bupadisibisewigon.pdfIn PDF document text
    • https://site-1037835.mozfiles.com/files/1037835/44761160671.pdfIn PDF document text
    • https://site-1037283.mozfiles.com/files/1037283/vokediwawanadunedek.pdfIn PDF document text
    • https://site-1036816.mozfiles.com/files/1036816/gozigopijetixojudotezuw.pdfIn PDF document text
    • https://site-1037262.mozfiles.com/files/1037262/55152314465.pdfIn PDF document text
    • https://site-1038653.mozfiles.com/files/1038653/22770701078.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://cdn.shopify.com/s/files/1/0440/8590/3510/files/xozovevatoret.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9055/6568/files/tplayer_apk_mod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/6569/6152/files/my_brother_sam_is_dead_audiobook.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_off00005818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5818 5332 bytes
SHA-256: 7343e50599637fdb89b5bd53c9fc4ed070e9c9fa29093c25da1664ffeef2eaba
font_01_sfnt_off00006a5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A5B 10048 bytes
SHA-256: fae30cc5475a2c11c2e2a2bf2d4c709238ffb603ebd20f96595403453912be9d
font_02_sfnt_off00008c75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C75 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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