Malicious PDF — malware analysis report

Static analysis result for SHA-256 be51198257f7f847…

MALICIOUS

PDF

43.4 KB Created: 2020-11-06 19:10:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 91a91631a7d16c1524e5a100b6e7ea54 SHA-1: 8ad0e7d4802e35ff706dc002f1426485c709d909 SHA-256: be51198257f7f847c7ab2d411055b0871bd0242401043cb026b9232ca093c457
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/aws?keyword=guilty+girls+sale PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384463/normal_5f927bdd0dc6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369659/normal_5f8ce99a4de16.pdfIn PDF document text
    • https://jugefisofewutep.weebly.com/uploads/1/3/4/3/134368120/vitufugeza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://forujutoko.files.wordpress.com/2020/11/157597504.pdfIn PDF document text
    • https://pupirod.files.wordpress.com/2020/11/sagob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70c1c1cb-9698-4f93-a744-544795d2fb61/34630168031.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aed42bd6-03c3-43e0-912f-c597d4998e9f/66869918269.pdfIn PDF document text
    • https://wejogude.files.wordpress.com/2020/11/niwasegini.pdfIn PDF document text
    • https://niwaruxev.files.wordpress.com/2020/11/piliguxuruge.pdfIn PDF document text
    • https://nuziwonuw.files.wordpress.com/2020/11/sejuvemisibagabi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52f73e8b-9c5c-468c-90b0-e10bd21d3e11/barron_s_ap_psychology_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb4f5f8e-8dbf-40d2-a84e-80b544df05ee/59366464200.pdfIn PDF document text
    • https://suvarofora.files.wordpress.com/2020/11/95519257918.pdfIn PDF document text
    • https://dilopipo.files.wordpress.com/2020/11/demetivudaxakoleze.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D5E 4652 bytes
SHA-256: 8ad7abec412e260ef0f6cd0a1925e9927eec43b4bb2d1570f0c3da74f8f2cb87
font_01_sfnt_off00006d48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D48 11004 bytes
SHA-256: 0be9dc54fce586cdb4adfd6201b61e8ca4915b2bee60dd57892e524293168c8e
font_02_sfnt_off000092c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92C6 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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