Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b5942cfcce60059…

MALICIOUS

PDF

50.9 KB Created: 2020-11-08 13:28:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: fe5a47d25ed3ed960cd42cc1647296f9 SHA-1: d6f8efba5a190aea6398c2035d81357edfa9c603 SHA-256: 6b5942cfcce6005907a89a0c335fe358497d0866d9bf7bf222c9cfdc5025e7e1
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafffe.ru/123?keyword=download+shadow+fight+2+hack+mod PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369163/normal_5f87fd79958e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377925/normal_5f94d0215dd82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427793/normal_5fa5ad19db5fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393028/normal_5f9c8b4419384.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://xizuxug.files.wordpress.com/2020/11/97284263723.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2173ecf2-97b6-48fc-91fe-619ab6de04cd/gavuxuveniju.pdfIn PDF document text
    • https://nagerare.files.wordpress.com/2020/11/20544207917.pdfIn PDF document text
    • https://rupuxijod.files.wordpress.com/2020/11/folog.pdfIn PDF document text
    • https://liseguwawig.files.wordpress.com/2020/11/suwejovi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84ee72d7-41a1-4d72-832d-dddd15ca908f/8729609071.pdfIn PDF document text
    • https://jadanadu.files.wordpress.com/2020/11/fakuvububulunajagogigare.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ed76ddd-9356-47d3-871b-f6dd2cc92a24/14410687686.pdfIn PDF document text
    • https://gukoxawe.files.wordpress.com/2020/11/65220727398.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000a132.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA132 18576 bytes
SHA-256: 5645765a38aa057675aabd8c7dbf4b61a02dfe8cc020023119b74cc2f5411a62
font_00_sfnt_off00006973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6973 5628 bytes
SHA-256: f7a59aee7afb3a7347617b98944304452a4298616639d195e8ec7e7eb3496ac4
font_01_sfnt_off00007c96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C96 10628 bytes
SHA-256: 76edcde8c2a79421bf649b6413783588ead08b7ad4ddce6ec7c0c899f4f5cda2

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