Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6945c2c402e2173…

MALICIOUS

PDF

36.1 KB Created: 2020-10-02 03:53:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 31c342b112d9a8713c78e4bc99b81301 SHA-1: b3850917b22d4f4f9eecb53d4af412c807851928 SHA-256: e6945c2c402e2173a3973eed2580d389bd26d4cf0292602aefa2fd55d3149314
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://ggtraff.ru/strik?keyword=bared+to+you+free+pdf+download In PDF document text
    • https://site-1038517.mozfiles.com/files/1038517/23660393798.pdfIn PDF document text
    • https://site-1040512.mozfiles.com/files/1040512/surubafutesefazogatasito.pdfIn PDF document text
    • https://site-1037082.mozfiles.com/files/1037082/jovororirijofujij.pdfIn PDF document text
    • http://tupavopu.messyelephant.com/uploads/1/3/2/3/132303028/zoxoxok.pdfIn PDF document text
    • http://selavolox.anavillaruel.com/uploads/1/3/2/7/132740780/3664477.pdfIn PDF document text
    • http://files.msmchemistry.com/uploads/1/3/0/8/130874252/725978.pdfIn PDF document text
    • http://files.sadhanayama.com/uploads/1/3/1/0/131069869/zonovuwatufen-xinuvukezozib-buturozogupini-dotikimumare.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/b9a45e80-cb11-4299-aff9-6d9b34071bdc/90611518442.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74ed89cb-bb0a-4819-9f4a-2f1da4b4252f/75730245343.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0a40ce3-c8a7-4112-8827-93942e795219/zavokelepoveton.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bdf77e6-81d1-4495-af60-62af76f483d6/genosudomirijuguxamuvo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f93a4e3c-b7b0-44b9-b45b-627d3f6b9604/xunozezelonefifadava.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_off00004e71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E71 5100 bytes
SHA-256: 06d48ca90cc955a102de8cbdf1dc10443f9956ab75a91c850089646bea2e7d64
font_01_sfnt_off00005ff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF8 10600 bytes
SHA-256: c680d6dc01302f3c9028c83fadf27349ac07968144feb8efdc518066d079aecd

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