Malicious PDF — malware analysis report

Static analysis result for SHA-256 52d54aff4c862382…

MALICIOUS

PDF

44.3 KB Created: 2020-11-07 22:24:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: e1c6b48cdfae9cc61432f84e1f1a4b46 SHA-1: e22d183447a52eac839b7af1e3e34b6475315d3c SHA-256: 52d54aff4c862382920915f9f8b1b9f919c994a1c44afac09ceec3a1c689dcc2
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://trafficel.ru/aws?keyword=games+for+girls+girl+games PDF link annotation
    • https://xukujeferok.weebly.com/uploads/1/3/4/4/134435440/2007957.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381102/normal_5f9bce1d010f9.pdfIn PDF document text
    • https://fupojipivub.weebly.com/uploads/1/3/4/5/134525069/davefifoseb.pdfIn PDF document text
    • https://buliduxefexefux.weebly.com/uploads/1/3/1/6/131636978/44a83bc3b39050.pdfIn PDF document text
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/4326943.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379964/normal_5f8de22ea32c3.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/6c3b4241-3cd6-40a0-b57c-949d160b5283/31316144837.pdfIn PDF document text
    • https://solejefiv.files.wordpress.com/2020/11/55677671389.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e18b5d9-d52a-4f8c-98b1-3296c135f494/48752925335.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f53f6459-fc84-4e60-aba3-155b58aff13a/kovekirubabawijima.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c688de47-2b36-4c4f-b0b5-4ae0f5a0f680/tejoxujudisilesevube.pdfIn PDF document text
    • https://ziruvetod.files.wordpress.com/2020/11/kitab_al_arabiyyah_bayna_yadayk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67680bcd-9198-4e6f-85fe-9b0deeb3cac1/86090295748.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_off00006d9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D9E 5116 bytes
SHA-256: bb5c69f269fec61fe13597bc7e244ea489eabc59e71a47ad833a09d7ddd4b9dc
font_01_sfnt_off00007ef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF4 11192 bytes
SHA-256: 30b73a1c0e82a34383b4e5f7298ef3f31bf62b925f02bfee1c477eb3556cc6a6

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