Malicious PDF — malware analysis report

Static analysis result for SHA-256 b098db4267b3b327…

MALICIOUS

PDF

40.8 KB Created: 2020-10-01 05:06:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 812e2fc0f595ac7714b68b9cca396a88 SHA-1: b5e18eb005a1663a2cec4e1ddcde8b97bffa5a4b SHA-256: b098db4267b3b3270c1bb10cf2a7b10af3efa68b104ce7be5baeaf95a8af2d42
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://cctraff.ru/strik?keyword=cv+format+for+school+teacher+job+pdf In PDF document text
    • http://forisoxa.laurenvanmullem.com/uploads/1/3/1/4/131436956/wegetamekezaxab_vumovamo.pdfIn PDF document text
    • https://site-1036969.mozfiles.com/files/1036969/59949859851.pdfIn PDF document text
    • https://site-1037884.mozfiles.com/files/1037884/xafaxusuwubufegamig.pdfIn PDF document text
    • https://site-1036733.mozfiles.com/files/1036733/lixotajarep.pdfIn PDF document text
    • https://site-1036764.mozfiles.com/files/1036764/xadisonaf.pdfIn PDF document text
    • https://site-1036820.mozfiles.com/files/1036820/xizitovikuni.pdfIn PDF document text
    • https://site-1037262.mozfiles.com/files/1037262/16846248814.pdfIn PDF document text
    • https://site-1039167.mozfiles.com/files/1039167/wusuvevagizugolidukukakaf.pdfIn PDF document text
    • https://site-1036733.mozfiles.com/files/1036733/68696467901.pdfIn PDF document text
    • https://site-1036987.mozfiles.com/files/1036987/27736060179.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/58c3cf9b-9266-4778-a0f7-7927ae88af38/84755677627.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2510e3c8-c084-4e4f-b62e-f3ba19043d3e/19260186817.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/736d08b6-b018-4fb5-a2b7-c6ae12c2f177/63155779042.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_off000060ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60FF 5576 bytes
SHA-256: ade9ed19fab3768c1455992a7b064732019669613f0e22e5b3e70ef8166c5cb1
font_01_sfnt_off000073d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73D1 10192 bytes
SHA-256: 9722c70b637da9d7da3e299d4c3b8b27f8aeb45bac4826fc5c07a208ff58606a

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