Malicious PDF — malware analysis report

Static analysis result for SHA-256 b979a996665cb4e5…

MALICIOUS

PDF

40.5 KB Created: 2020-11-09 15:15:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 0106a96dca0c61d0209c5115c6078a80 SHA-1: b231be2d509e658f9d62d19e70dde871e9be1561 SHA-256: b979a996665cb4e56d32f9bed294a570b59ac33f6d3d2aec805aa7a3fcc74405
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffking.ru/aws?keyword=minecraft+command+block+fog In PDF document text
    • https://toxekemugig.weebly.com/uploads/1/3/4/4/134484635/6141260.pdfIn PDF document text
    • https://fisezofibidan.weebly.com/uploads/1/3/4/3/134316577/b0da2bd542761b.pdfIn PDF document text
    • https://fidevawane.weebly.com/uploads/1/3/0/8/130814252/499744.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365560/normal_5f87098cb5def.pdfIn PDF document text
    • https://pelofaneb.weebly.com/uploads/1/3/4/2/134235527/sipezozusod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369305/normal_5f9239f9ee5d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404116/normal_5f9879543a0ad.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/4fb587a4-54f2-40af-bcbc-791c21e8f892/dajukonakuvidunegujudoben.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a384fcd5-57ac-49c8-9b34-f6b287676fba/zabubov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ee55bf2-5e51-4c85-a81d-419000802e04/tone_of_the_poem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c56dc1b-c92a-46cd-b07d-751610fa3193/baxovafijavozubavenovaju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbd5ffa8-7f9c-4f0b-931b-b1910d5761f4/vipevabodimumagupitud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cd25a1a-f622-45a9-934e-cb57d3cf45e2/mijatavorib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12aaa29c-ce7a-4bda-aac9-872b47a95880/68595674176.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_off00005d8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D8D 5372 bytes
SHA-256: 8d04d7c2b754c7e1c4b726af1227a418562ef6066ed2eae074d86ce60ddbd426
font_01_sfnt_off00006fcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCF 10976 bytes
SHA-256: 83574117c12e6d5a67ee2c543ddf499dda040713961a80e49046a33f8a5d223c

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