Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e0096b688406d73…

MALICIOUS

PDF

46.8 KB Created: 2020-10-15 23:06:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 95b8e3681e088443d8a244823a4b512a SHA-1: f3f1d2aacad23241ed9fbe90253a71b4cf92ed79 SHA-256: 8e0096b688406d7357db71a4948bc7945a16efa65a6a2fedcf77248297fa195c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded links, including one pointing to known malicious redirector infrastructure. The document's structure suggests it is part of a link farm designed to drive traffic to potentially harmful sites. The ML classifier also strongly indicated maliciousness.

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 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.
  • 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=identifying+place+value+in+decimals+worksheets In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366385/normal_5f873d98ca1c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5f86f82adebc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367632/normal_5f8836f42ed14.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/manofuzawidevu.pdfIn PDF document text
    • https://fupexorugukemig.weebly.com/uploads/1/3/0/8/130814763/5724279.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/e5bcd2697.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/aa94aa7f99c.pdfIn PDF document text
    • https://site-1038868.mozfiles.com/files/1038868/repafowonu.pdfIn PDF document text
    • https://site-1036995.mozfiles.com/files/1036995/bilajitigezasa.pdfIn PDF document text
    • https://site-1038951.mozfiles.com/files/1038951/vamefubunuvedukerat.pdfIn PDF document text
    • https://site-1039271.mozfiles.com/files/1039271/29847620203.pdfIn PDF document text
    • https://site-1040387.mozfiles.com/files/1040387/41483804619.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5301/8016/files/avanti_wine_cooler_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8433/6283/files/1861045888.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9560/3865/files/what_is_sabaton.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/0710/3143/files/santorini_private_tour_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2832eb90-5b78-4fb1-a462-aa25eb8f6985/foboloritipagujibijem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d7f87d5-175b-4cc1-b26b-85c637709b68/kuwewekopaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b9d677a-1b7e-4254-95c3-da85523c88bf/muwurasujilopajivu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7959832a-50c9-4a6b-bbd5-f4483e714876/62190112561.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d92046ac-34af-4679-b425-c95716db8375/tonipomapikulu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7810/0148/files/autocad_manual_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6321/3209/files/pezigikivadetawax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9249/8850/files/fezenepinazukewuzikuwame.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_off00007792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7792 5824 bytes
SHA-256: 7f64cb0dca0d0eba474d1a3c8a7649c371b51dee4ea584706010f32672a7ad96
font_01_sfnt_off00008b54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B54 10032 bytes
SHA-256: 3a0f7a157156d0d57cb3994cbdd0e5a35c05c3f237adb3fbe5f1cac6443c04b4

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