Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fc9088f7079b6df…

MALICIOUS

PDF

50.7 KB Created: 2020-10-02 11:40:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 68aa0bee81e05e719404a4e312ef2839 SHA-1: fc1df0e6092d0c3c0853d38a79041ae382073c38 SHA-256: 9fc9088f7079b6df34915a2da2fc8782079b3537f06271c2ce3efbf792ac79e3
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/strik?keyword=deep+learning+book+pdf+free In PDF document text
    • http://jedizin.dopesickdotcom.com/uploads/1/3/0/8/130814328/9ad9fa87.pdfIn PDF document text
    • http://files.internationalassociationofmetaphysicians.com/uploads/1/3/2/8/132814432/senikakexidipog.pdfIn PDF document text
    • http://maveb.hoylandspringwood.org/uploads/1/3/0/8/130815582/gaxewofibaloxov.pdfIn PDF document text
    • http://files.ypdwater.org/uploads/1/3/2/6/132695759/jusitelo-suwowox.pdfIn PDF document text
    • http://files.bradbstevens.com/uploads/1/3/2/6/132696067/gepulu.pdfIn PDF document text
    • http://files.oldsoulwoodwork.com/uploads/1/3/0/7/130739454/daguxiroxapuwenijab.pdfIn PDF document text
    • http://lawixatut.squishyartteacher.com/uploads/1/3/1/1/131164439/gunowivisabo.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/05ee8e80-8fc5-4e37-907a-41a6e60a754e/paravoledat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d34e1f9-b29e-4162-9493-84308f7ca073/gipili.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d83fe346-10e4-48aa-9d4c-d14292511182/1022242817.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70eed95f-b234-4ec6-9d82-86e4339d78b6/28941006701.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26bb4bc4-e913-423b-8bbb-7af368eaa367/24991884668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85f5b2c5-f784-4816-a8a1-d105320a8097/22185379742.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/732a9fc3-70fc-49d7-aaff-64d56050a1c5/kawemegagukifebano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8534c7d0-f3d1-4b9d-9864-bc929df8d429/jazewunagatuvujopu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5869a43c-3a01-45d2-9608-70ec1113a9a2/sowunaxaxipogijigen.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E7E 6440 bytes
SHA-256: 629123bfde0685c5f69bbdd27ec008bde0224d5c30af1dabb990f6ee33ea778e
font_01_sfnt_off00006e72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E72 5232 bytes
SHA-256: e11f8c188d2e6891748c965161b5fe4cabac4784f55d7cb7dda9d58128349087
font_02_sfnt_off00008054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8054 10908 bytes
SHA-256: 3a701efd49ad0515a67d546cec53e38bbf7917454f9d5749b8e571eaaf6afb7c
font_03_sfnt_off0000a5c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5C1 16896 bytes
SHA-256: 52504450acf81a48d342fdf151a1a3b3aea2f6c8a21e6a807bfb4fddad8e9334

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