Malicious PDF — malware analysis report

Static analysis result for SHA-256 25cb18145efb49e1…

MALICIOUS

PDF

497.8 KB Created: 2022-03-07 23:34:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-02
MD5: b61904470301553ee2ee7b243fc2587b SHA-1: d112917a70551c6cc49d2202fa1a5611d8fb7eb7 SHA-256: 25cb18145efb49e1df36ed3a7ec76d6a5bb775734a2e0716c18cc7bee6c4f5fb
161 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.5319

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 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 advertises pirated movie streaming/download medium PDF_PIRACY_STREAMING_LURE
    PDF rendered text advertises free full-movie streaming or download using piracy-brand names or a 'full movie + download/free/watch' intent phrase — recovered after folding the styled Unicode confusables the campaign uses to hide those keywords from plain-text detection. These are disposable SEO-spam carriers that route users to malvertising, fake-player, and scam pages; the PDF itself is inert.
  • 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://www.clinicainthera.com.br/kcfinder/upload/files/1817693200.pdf In PDF document text
    • http://dongphat.net/upload/files/75837629154.pdfIn PDF document text
    • https://www.milestonesmn.org/ckfinder/userfiles/files/83706669362.pdfIn PDF document text
    • http://electronicascanaresas.com/kcfinder/upload/files/90089839857.pdfIn PDF document text
    • http://eclickapps.in/userfiles/files/87870066592.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/s0vr74cv3kbtmj8abcp0522388/fugikoxafopivezukonep.pdfIn PDF document text
    • https://pizzeriagiganti.ro/imagini_ws/mobarigakalumib.pdfIn PDF document text
    • http://24hnbc.com/assets/ckfinder/core/connector/php/uploads/files/jiwit.pdfIn PDF document text
    • http://natpuedu.in/userfiles/file/43039886093.pdfIn PDF document text
    • http://xn--80aer5aza.xn--19-kmcm3c.xn--p1ai/ckfinder/userfiles/files/68994616011.pdfIn PDF document text
    • https://oncallanatomist.com/ckfinder/userfiles/files/32765062507.pdfIn PDF document text
    • http://aktifimmo.lu/userfiles/files/fezoj.pdfIn PDF document text
    • http://nellion.ru/upload/files/nupinogejin.pdfIn PDF document text
    • http://vanguardhungary.hu/userfiles/file/jasokov.pdfIn PDF document text
    • http://lilipoupoli-drama.gr/lilipoupoli/js/ckfinder/userfiles/files/dawajesizopirorefu.pdfIn PDF document text
    • https://ctyhoanongangiang.com/userfiles/file/lefiteliliguvometa.pdfIn PDF document text
    • https://houstoncoinshow.houstoncoinclub.org/FCKeditor/file/wumabebobaresun.pdfIn PDF document text
    • http://velo.hu/UserFiles/file/webibumenunake.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/44091923550.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1621a6ee67a48f---26416530184.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/1214951238.pdfIn PDF document text
    • https://borsalino.ro/imagini_ws/98039443091.pdfIn PDF document text
    • https://hizlipin.com/calisma2/files/uploads/23497694858.pdfIn PDF document text
    • https://www.fcefrance.com/kcfinder/upload/files/38631468169.pdfIn PDF document text
    • http://arsenev.verlauf-ekb.ru/admin/ckfinder/userfiles/files/98569077559.pdfIn PDF document text
    • http://reputesystems.com/app/webroot/uploads/files/46604179138.pdfIn PDF document text
    • https://www.apsar.es/assets_back_office/js/plugins/kcfinder/upload/files/tuduxopoz.pdfIn PDF document text
    • http://plan1.ir/assets/ckeditor/kcfinder/upload/files/93487970810.pdfIn PDF document text
    • http://truhlarstvi-strakonice.cz/files/file/94719882449.pdfIn PDF document text
    • http://aroma-es.site/yamituki-n/uploads/files/50729201308.pdfIn PDF document text
    • https://mamo-tato.ro/userfiles/file/fomakosutavudonubos.pdfIn PDF document text
    • https://bnbcostaverde.it/userfiles/file/jadexupofamuvuguraxe.pdfIn PDF document text
    • https://taiwancy.com/app/webroot/userfiles/files/42295421199.pdfIn PDF document text
    • http://www.kermaz.fr/js/kcfinder/upload/files/33305250081.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/746e35f77dbb2b4063f9fbc43c6ac449/5917256756.pdfIn PDF document text
    • https://sunuf.co.za/XSRYdR1H?utm_term=acca+f5+december+2017+answersPDF 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_off000751b7.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off000751b7.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000751b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x751B7 10964 bytes
SHA-256: eee81e49b1a7cb1dae005aa98dbf3221b6b523ccf7f7f312156949e13e821b55
font_01_sfnt_off00076b6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76B6A 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_02_sfnt_off00078285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78285 20280 bytes
SHA-256: f99f56da0dd12c3ebde14f1f11d0c33f4370d2e0b99465c227bb3ab23cf67ef7