Malicious PDF / .VIR — malware analysis report

Static analysis result for SHA-256 4db28bb160858005…

MALICIOUS

PDF / .VIR

367.6 KB Created: 2022-01-21 16:52:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2024-09-03
MD5: c09965d33cdf7e7d39d2622d5993c23f SHA-1: 41bbb58779b59dcf6a2c32a3fe0bd92daf6a6fc7 SHA-256: 4db28bb1608580056cb38b298429ba846fb66f179695805309e3a13d73f21c6c
234 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.5901

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Travel-support phone-number stuffing scam critical SE_TRAVEL_SUPPORT_PHONE_SCAM
    Document repeats phone numbers in airline/travel/refund/support language, often across multiple regional phrasings. This matches SEO/support-scam PDFs that impersonate airlines or travel brands and route users to attacker-controlled call centers rather than a normal travel document.
  • 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.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. 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://turystycznapodkowa.pl/userfiles/file/tesezudezipukisatiseze.pdf In PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/1cb2ba6d18255b7b2faa40ada189d3c6/nebipuf.pdfIn PDF document text
    • http://xn----7sbabjlebzbdsbxti2bw3r.xn--p1ai/files/files/noragimuvolofirorogavimi.pdfIn PDF document text
    • http://ingfrimale.com/userfiles/files/84285906551.pdfIn PDF document text
    • https://ahreco.com/uploads/news_file/81877109211.pdfIn PDF document text
    • https://kirbas.com/img/uploaded/file/10512298712.pdfIn PDF document text
    • https://raguvosbaldai.manovonia.lt/images/files/gamozunuwedezozuxajor.pdfIn PDF document text
    • http://yotlist.com/uniformkontakt/userfiles/image/files/26537970009.pdfIn PDF document text
    • https://mytshirtcreator.com/app/webroot/files/file/98489777775.pdfIn PDF document text
    • https://uleshuzatabc.hu/files/file/bapixu.pdfIn PDF document text
    • http://wogo.net/data/wogo.net/uploadfiles/file/36202817684.pdfIn PDF document text
    • https://toptenstudy.com/upload/files/BodyFile__6190107E47BB5.pdfIn PDF document text
    • https://hoakhanh.vn/uploads/image/files/8539910267.pdfIn PDF document text
    • http://kemnhapkhau.com/upload/files/wemonodufodo.pdfIn PDF document text
    • http://phutungvespaco.com/luutru/files/zizadafisodarutubiloto.pdfIn PDF document text
    • https://niceppl.com/images/file/rumeni.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/161e8cf24b7894---wanevuvivoruge.pdfIn PDF document text
    • https://nabsangram.com/userfiles/file/35830967652.pdfIn PDF document text
    • https://vanvoorst.info/uploaded/file/sovenupuj.pdfIn PDF document text
    • https://guehenno.kendalch.com/upload/files/fakikakorululirin.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16197ac99b8e8b---sasazu.pdfIn PDF document text
    • https://value.ae/userfiles/file/pibovozasepibuwijovexexo.pdfIn PDF document text
    • http://boston.pl/fck_pliki/file/feketepebowotuxefu.pdfIn PDF document text
    • http://mauthietkedep.info/upload/files/vegekurorerusiluxapajed.pdfIn PDF document text
    • http://andersen-racing.com/pictures/editor/files/51501095317.pdfIn PDF document text
    • https://noventa.cz/media/files/file/56959847677.pdfIn PDF document text
    • http://ilsungwarehouse.com/userData/ebizro_board/file/liram.pdfIn PDF document text
    • https://tybistanbul.org/resimler/files/41783298221.pdfIn PDF document text
    • http://www.martiusstaden.org.br/js/ckfinder/userfiles/files/lexilujudoni.pdfIn PDF document text
    • http://asirakademi.com/resimler/files/fotovolejiregirij.pdfIn PDF document text
    • http://kup-vino.cz/web/ckfinder/userfiles/files/tewavizusaxepevim.pdfIn PDF document text
    • https://nichecnk.leaddeehub.com/userfiles/files/xazazovujizunaruvesurikub.pdfIn PDF document text
    • https://www.db-ynox.fr/ckfinder/userfiles/files/wejobejinu.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161be028c4d95a---zurebuba.pdfIn PDF document text
    • https://instalacje-elektryczne.net/ckfinder/userfiles/files/liraxewajanonogevavufula.pdfIn PDF document text
    • https://nbtele.com/en/cache/fck_files/file/rigovomuwesidewumajov.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/896FEnmJZlk/uplcv?utm_term=laid+off+letter+templatePDF link annotation
    • 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 extracted file (font_00_sfnt_off00055263.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00055263.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00055263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55263 17520 bytes
SHA-256: 83aac66e9fcb95a3bbf660e4e77530022ff8507beb67a96c4e32e3bd6ced36ae
font_01_sfnt_off0005807c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5807C 10344 bytes
SHA-256: 6c2a034be4a35ae1c3c8d7e0d035ca231328f6bc810e3b6b9a661eb167f91565
font_02_sfnt_off000597c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x597C5 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336