Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad91e3f7bb3dc5f2…

MALICIOUS

PDF

65.3 KB Created: 2021-02-24 17:47:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 5b941264f486359141495ecec1126694 SHA-1: 4aafc56b2e50267843b561d80939009de85136d0 SHA-256: ad91e3f7bb3dc5f2cb10c9208f9b5086211c91131774edeaf8a7365440c40f21
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://bologen.ru/wb?keyword=patriarcas%20y%20profetas PDF link annotation
    • http://jikusofare.mywebcommunity.org/tamorekugemikefaxukimekaw.pdfIn PDF document text
    • http://shop-profildoors.ru/twisted_metal_pc_free9en3f.pdfIn PDF document text
    • http://natur-green.fun/foxeer_arrow_mini_pro_manual0pcpb.pdfIn PDF document text
    • http://kamikofonem.mygamesonline.org/63312858795.pdfIn PDF document text
    • http://kojazunupetip.mygamesonline.org/43182798063.pdfIn PDF document text
    • http://loginwithfb.site/ejercicios_resueltos_de_notacion_cie9xbrw.pdfIn PDF document text
    • http://gedadekenoz.mywebcommunity.org/noxonakinugonej.pdfIn PDF document text
    • http://rte-ita.fun/fuwomexusimwq64i.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gozenabuzixi.onlinewebshop.net/xirizugizenurisuzanu.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/news_nation_wgn_app.pdfIn PDF document text
    • http://pinamagowejut.epizy.com/wataxoj.pdfIn PDF document text
    • http://jokosen.atwebpages.com/5638522036.pdfIn PDF document text
    • http://kepofif.onlinewebshop.net/springfield_ar_15_stock_kit.pdfIn PDF document text
    • http://tiwatimab.atwebpages.com/vimixoxomovebatun.pdfIn PDF document text
    • http://faxiruvud.myartsonline.com/95089183209.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_off0000c301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC301 5080 bytes
SHA-256: 3c0943033c2ba4f5b5008784bc3ef0be0aa576d8bd6d1eececfa5bb0e3ecf6f0
font_01_sfnt_off0000d461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD461 10980 bytes
SHA-256: a0bef51cc90eb02dde87c244b2af461c3be82a61bcad75c6ef0a56747aeea0e3