Malicious PDF — malware analysis report

Static analysis result for SHA-256 7528cebf1604af88…

MALICIOUS

PDF

38.6 KB Created: 2020-10-16 16:00:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 1df46ef1704641709bc2c4566c9f7c12 SHA-1: 00a0c727f2623674cfb7aa718ad5e3fc8588c9e8 SHA-256: 7528cebf1604af8860ecd4095662959c994b2fe8a799bc997d52eb2ea4a981dd
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/123?keyword=royal+navy+type+45+destroyer+manual In PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/bb8b5ad.pdfIn PDF document text
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/8225448.pdfIn PDF document text
    • https://tegugozitofo.weebly.com/uploads/1/3/0/8/130874592/065fd.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/pasifoxixugererupew.pdfIn PDF document text
    • https://turomanusogagi.weebly.com/uploads/1/3/1/4/131453559/ludiditepif.pdfIn PDF document text
    • https://razezoxuwen.weebly.com/uploads/1/3/1/4/131453099/3422359.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370785/normal_5f89528cee65f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369330/normal_5f88a352d9d46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368227/normal_5f87c3c447620.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368996/normal_5f895f59188f9.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/c5eb912b-b62a-4834-9097-afe8d83534b8/tobasolajomejidefaxulovup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38cede3b-9b68-4d5c-9ebf-f2a06eb7de0d/sadorupezupajujob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a883435b-97e8-4d26-a7e4-00c271197984/jisix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7865374c-1f85-4c4e-97fd-29abff5d5f73/wofuzafivovofaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d4dd5b0-957e-499c-8bfa-f2149a2e6774/86841536187.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53d425f4-8447-4abf-ba74-39325698cddd/20956006578.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54de9566-2032-4849-a9a1-dd2fac26816f/vosax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec152897-5a65-4cd9-a680-d222aa51fbaf/senafilekuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f950a75b-4667-4e01-94da-794f9ceef069/xozuwikowanunilomi.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_off00005806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5806 5484 bytes
SHA-256: 1b9d2d8f287e069f4be4c3d0f9ff18c7f919acfac7535b461bbb5e75240623a7
font_01_sfnt_off00006aaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAA 9992 bytes
SHA-256: 052fa9e51fcefa81d51a6f1f41b372cb289dce18dde2f5be8705d3907582aa8a

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