Malicious PDF — malware analysis report

Static analysis result for SHA-256 6944c80b64639ed5…

MALICIOUS

PDF

38.7 KB Created: 2020-10-06 18:14:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 3fd0dabf58b5fc9964cb7ffaba67d615 SHA-1: a41eae4ef5406ea9bebd69a8f94fd8778d35c2b0 SHA-256: 6944c80b64639ed5c6cd06fdc388958db2bffa7faf35243aac50277ea1932c03
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://ggtraff.ru/strik?keyword=advanced+dungeons+and+dragons+2nd+edition In PDF document text
    • http://weteb.mountainviewmentalhealth.com/uploads/1/3/0/8/130873947/4568370.pdfIn PDF document text
    • http://xuwuto.legacycakery.com/uploads/1/3/2/7/132712572/384c37f19.pdfIn PDF document text
    • http://batuno.larsnybergmathinfo.com/uploads/1/3/1/4/131437299/7568801.pdfIn PDF document text
    • http://files.greatestpearlwithin.com/uploads/1/3/1/8/131857152/5db51c87.pdfIn PDF document text
    • http://bareburi.dancinginshadows.com/uploads/1/3/0/7/130739173/80198.pdfIn PDF document text
    • http://resiferim.allsaintshighwycombe.org/uploads/1/3/0/7/130776819/lupane_wepomegijumev_nolab_kukawez.pdfIn PDF document text
    • http://kumolon.zollaliebermangallery.com/uploads/1/3/1/8/131857334/5013479.pdfIn PDF document text
    • http://files.kaseandjase.com/uploads/1/3/1/4/131482963/37d886d.pdfIn PDF document text
    • http://files.suesteffes.com/uploads/1/3/2/8/132814071/2587804.pdfIn PDF document text
    • http://files.hsc3knives.com/uploads/1/3/0/7/130775370/sigezodimuwe-gezokopudaxa-jevusu.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/5dc2d98a-585b-4805-a855-232e283ff207/lepemuvebuvotus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2a8c1a8-5fd5-426d-a9af-4467b90a7e40/sakemezaligoson.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9be2b0ec-2da8-4fbd-92c1-0d669cf72510/xovaserojujeje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef2a56d2-71ed-4f4b-9c10-b61429bf1a88/762291046.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58813992-04c2-45ce-a5b5-363fab5c5586/72599397535.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2451/7790/files/create_clipping_mask_krita.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3376/3746/files/sb2_exemption_cover_sheet_riverside_county.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7669/7760/files/jexiwakufepefunafefodadu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9501/4056/files/vocabulary_level_d_unit_11_answers.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_off00005857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5857 5256 bytes
SHA-256: cebab28c26dd0c4546c3ee736504b4b231fa87ec928947a85808458bb5e9a23e
font_01_sfnt_off00006a50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A50 10532 bytes
SHA-256: e41c4b0dcc1840a887d839bb3b63f81845a1ca4e35dbcd33c54a9ec96a8e17f7

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