Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f4fdeb2df4ef144…

MALICIOUS

PDF

57.4 KB Created: 2020-11-06 14:47:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: f502743d1b7071c64a77b46768935c77 SHA-1: ce3b24cf7760304a157344cf61b88acff872ec76 SHA-256: 8f4fdeb2df4ef14425100bbc79656c7caaf17fd240c0174e3c2280486065ac6b
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://traffset.ru/aws?keyword=migration+patterns+ap+human+geography PDF link annotation
    • https://lulitetuxopibol.weebly.com/uploads/1/3/1/1/131164377/pimirifesab-lepibat-katebiz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413016/normal_5f99b3a42be10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366302/normal_5f9c364363fcf.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/domovodibaposix.pdfIn PDF document text
    • https://sakukavazu.weebly.com/uploads/1/3/1/3/131379729/2044869.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416940/normal_5fa11231d5a96.pdfIn PDF document text
    • https://wepebagelokej.weebly.com/uploads/1/3/4/5/134583559/ranozob-sirekekerirejof.pdfIn PDF document text
    • https://wefolukozik.weebly.com/uploads/1/3/1/4/131406413/wuzeva.pdfIn PDF document text
    • https://zadavutuni.weebly.com/uploads/1/3/4/3/134343582/5336337.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/acb7993f-d42c-4d4f-9905-fc4cc7d992b2/butomi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b53a3105-94d6-4b59-b299-296080b40745/muxafipogeraxetam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6ed91bd-d6f4-410f-a055-f2a9807cc256/lekujeponodexub.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_off0000a391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA391 5308 bytes
SHA-256: 30689fcd0c29bd2d1acd1b069eccd1c28ed0c1363110bc760a356dd9427eb9fa
font_01_sfnt_off0000b58b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB58B 10244 bytes
SHA-256: 8878c355cd0137b41ae5ebcada856d746e1479b3f70c6fe8850fa482b120002f

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