Malicious PDF — malware analysis report

Static analysis result for SHA-256 5683c5ec95b29c58…

MALICIOUS

PDF

36.4 KB Created: 2020-11-07 03:12:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: b79d579ec6c8a7544ea5a67aaef736ac SHA-1: e63bbb9991dd1c06b72f3d29ab2a7c07164401e0 SHA-256: 5683c5ec95b29c58e3360df2bd3ca085ad7621991af9e4669d4831e531062540
136 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.
  • 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.
  • 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=delta+chicken+festival PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377102/normal_5f9b059042bea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383928/normal_5f8c81467b524.pdfIn PDF document text
    • https://pativezakuzorad.weebly.com/uploads/1/3/4/2/134266084/bovurojebidifosomon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382780/normal_5f9ac72fb6e3a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/coca_cola_fabric_panel.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/dust_devil_slayer_guide_osrs.pdfIn PDF document text
    • https://kitobus.files.wordpress.com/2020/11/pudenebojel.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/preposiciones_en_espanol.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/sowawo.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/lixuzumabegokavezagi.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/the_ames_brothers_rag_mop.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/alimentacion_complementaria_blw.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/leganuvimifowa.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_off00004f59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F59 4996 bytes
SHA-256: 6202c41c2a44ad9cf3a469848621b88787cac90ab2d28e0a44841f908be7765e
font_01_sfnt_off0000606b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x606B 10740 bytes
SHA-256: 2fff9ab9f6f4fb1aada5b99028be629816ecbd4c66e4443f5e0158995aaf1a0d