Malicious PDF — malware analysis report

Static analysis result for SHA-256 4872e811e0d61c3a…

MALICIOUS

PDF

242.8 KB Created: 2022-01-21 18:56:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-22
MD5: ffd8741bbb03c9cefee4240f5821565d SHA-1: d76ab8f9d6419491a35a863fb862acd4500c97ae SHA-256: 4872e811e0d61c3a06561957878ae347a5d634abef36912405b3f29edbb1395d
226 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.8583

Heuristics 7

  • 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.
  • 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 http://streetnn.ru/data/upload/ck/files/tibasonejiwotama.pdf In PDF document text
    • http://harasim.cz/uploaded/files/kidinalewepuz.pdfIn PDF document text
    • https://gptracker.interverse.biz/userfiles/file/68367268619.pdfIn PDF document text
    • https://nieruchomoscikomercyjne.co/files/file/43072203189.pdfIn PDF document text
    • https://rozetki.su/kcfinder/upload/files/patevo.pdfIn PDF document text
    • https://seltec.io/images/uploads/files/2570426979.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/4f01c808efae805f9facdbf14f1a0186/golezarulajadiwafo.pdfIn PDF document text
    • http://elistaprezentow.pl/userfiles/file/50428195519.pdfIn PDF document text
    • https://neksav.com/upload/ckfinder/files/95513092992.pdfIn PDF document text
    • https://path.mn/userfiles/files/33426987897.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16134c083d002a---79959331721.pdfIn PDF document text
    • http://thenikharvconsultancy.com/userfiles/file/34779991992.pdfIn PDF document text
    • https://karsdanapazari.com/panel/kcfinder/upload/files/gipesixedotejegopek.pdfIn PDF document text
    • http://safetyassessmentsolutions.co.uk/ckfinder/userfiles/files/82970956317.pdfIn PDF document text
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20211213065214.pdfIn PDF document text
    • https://at-studio.tw/app/webroot/userfiles/files/20220111_112416.pdfIn PDF document text
    • https://tauthuy.vn/upload/files/kofuxelisabazewukidosuro.pdfIn PDF document text
    • https://idroilektriki.gr/files/file/73311425695.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b0089a9cb9a3f4681f2864902fdb4c35/8384555790.pdfIn PDF document text
    • http://lucchetta.net/userfiles/files/15221293069.pdfIn PDF document text
    • http://land89.com/ckupload/files/52694239558.pdfIn PDF document text
    • https://lederstuhlshop.de/ckfinder/userfiles/files/segakozekudidowodoki.pdfIn PDF document text
    • http://vincentianssjp.com/userfiles/file/49053485729.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1618aaeda2d004---84485353602.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/1hHberoKktI/uplcv?utm_term=ch+play+apkmirrorPDF 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_off00036009.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00036009.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00036009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36009 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_01_sfnt_off000376ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x376AD 10252 bytes
SHA-256: 461cfe35b7e2d743ce847d828eb04dae0efbb55a7ed405cb5b81a169ddbdbc56
font_02_sfnt_off00038da2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x38DA2 17988 bytes
SHA-256: 3b7f4b565341f232f178275884f3c824bc688f27fa5b26c2e26afd0fa9212d18