Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad3438cff6af511b…

MALICIOUS

PDF

42.8 KB Created: 2020-11-05 22:27:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 63ecd6882d7bd5fd5b7bcb3d8f185366 SHA-1: b646e22876467831e864f10e2154b20f4ca59357 SHA-256: ad3438cff6af511b755552d2bd9a8fb25abcc5aaa632e8c39d0537a72a859692
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://trafffi.ru/123?keyword=industrial+revolution+study+guide PDF link annotation
    • https://semezuzuxikazug.weebly.com/uploads/1/3/4/2/134234688/6310791.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403273/normal_5fa41344234ed.pdfIn PDF document text
    • https://degitigurot.weebly.com/uploads/1/3/4/3/134337886/getenene_nirelujidup.pdfIn PDF document text
    • https://zemejinifuv.weebly.com/uploads/1/3/4/5/134577925/lopikudusiz.pdfIn PDF document text
    • https://folukufisika.weebly.com/uploads/1/3/1/3/131384255/2449080.pdfIn PDF document text
    • https://revibafejinaj.weebly.com/uploads/1/3/4/4/134485322/74f53b25e18e.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/87313b0f4c.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/b3434e0a-9652-4d5e-bf68-94b7a1055f79/49745836555.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d401ce1-f730-45c5-b38c-ad70b65ae9ec/dutuwufegu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b9fa3e3-1b1d-48b0-ae12-971c4f0b0120/lekuvisoporiwovuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82f9bc24-3ff6-407a-a3f0-e7031b0163a3/pegilugotubaze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3a72b6d-6494-48cd-b719-7f8320aaf629/radibilov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce3f3bb0-26f2-466f-b45b-6d8c5fb81138/47349298313.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_off00006a28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A28 5092 bytes
SHA-256: af8de27bc4b9dcc831c60efde0f1a20939840012e16ad8d28015d24e3a14ad45
font_01_sfnt_off00007b95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B95 10244 bytes
SHA-256: 22786a92b04df4998319141bf1b0988a134a38eeb4a54346a34505de380c841c

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