Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbef4c1dcff6caa7…

MALICIOUS

PDF

415.4 KB Created: 2022-03-13 09:51:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-24
MD5: 0d1e9c22e9d19b9ac13df2aed15bc946 SHA-1: 18c0f5f8cb23b961e92acd5dd5a5c1fce01c6c6a SHA-256: cbef4c1dcff6caa79ef335847ddf5fe9a582d3c65618e7fc0aa9aec047cfbec7
136 Risk Score

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4562

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 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://kazbani.ru/kcfinder/upload/files/90571704557.pdf In PDF document text
    • http://topclinique.ma/kcfinder/upload/files/pamerolufaj.pdfIn PDF document text
    • https://strings97.hu/userfiles/file/jatilibufejekedabox.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/bufazibopeb.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16206853cd1f18---suwosozuzuxuxofofugu.pdfIn PDF document text
    • https://dassti.cl/admin/uploads/file/muxololefuti.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/162285f90cb345---64326683584.pdfIn PDF document text
    • http://help-avocat.fr/js/kcfinder/upload/files/59507865777.pdfIn PDF document text
    • http://la-traverse.biz/kcfinder/upload/files/67158668706.pdfIn PDF document text
    • http://iba.chemolak.sk/userfiles/file/10763276913.pdfIn PDF document text
    • http://xn--54-dlcdkamdj4btild5b.xn--p1ai/ckfinder/userfiles/files/90374159306.pdfIn PDF document text
    • http://papaicountrylodge-longstay.com/user_img/files/38462502069.pdfIn PDF document text
    • http://libron.pl/fckupload/assets/file/kilolavefozikodemuvugox.pdfIn PDF document text
    • http://zhizhencn.com/filespath/files/20220228030937.pdfIn PDF document text
    • http://safetyservicecenters.com/userfiles/file/60152592393.pdfIn PDF document text
    • http://dungcumaymoc.com/Images_upload/files/49647118601.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/8ba4a85544abd6ba69a0a8b5301981ac/61137055468.pdfIn PDF document text
    • http://tse.net.in/assets/ckeditor/kcfinder/upload/files/dobekutufupopenanoso.pdfIn PDF document text
    • https://u-spot.biz/js/ckfinder/userfiles/files/difobazinasunudevugezavor.pdfIn PDF document text
    • https://interangkorcondominium.com/userfiles/file/danuvedidiwonutigemabuken.pdfIn PDF document text
    • http://audyt.rowerowaszkola.pl/imgturysta/files/lepisapepatuwojet.pdfIn PDF document text
    • https://cgb-echafaudage.fr/upload/files/wofiromuroluzavine.pdfIn PDF document text
    • https://10fci.org/userfiles/file/tiwoxikuxapakifeli.pdfIn PDF document text
    • https://kossuth-csepel.hu/inc/kcfinder/upload/files/643283979.pdfIn PDF document text
    • http://chinalabware.es/d/files/7510178498.pdfIn PDF document text
    • https://ls-machinery.com/uploadpic/files/202203050025592533.pdfIn PDF document text
    • http://ekonopuntos.com/campannas/file/83314698925.pdfIn PDF document text
    • http://optykglowacki.pl/obrazki/files/wajimimozobosekosodulez.pdfIn PDF document text
    • https://dolaodong.baohohoanglong.com/userfiles/file/45046566725.pdfIn PDF document text
    • http://www.auberdiffusion.com/ckeditor/kcfinder/upload/files/64598772505.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16215f4bf24109---24492967195.pdfIn PDF document text
    • http://mirgalosh.moscowfashion.net/content/xuploadimages/file/50650048167.pdfIn PDF document text
    • https://roofmed.ru/wp-content/plugins/formcraft/file-upload/server/content/files/162048c7cceca1---sozewuxukowuxakimafa.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1620018f221eb5---13342121730.pdfIn PDF document text
    • http://brandorbit.in/userfiles/file/gunubo.pdfIn PDF document text
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/difulumavezeko.pdfIn PDF document text
    • https://yubit.co.za/XSRYdR1H?utm_term=aquatic+biomes+worksheet+high+schoolPDF 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_off00060c25.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00060c25.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00060c25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60C25 11120 bytes
SHA-256: 239153d3302c31bf1050d5c68537372c89a1785be87cdec517ed1e6425d41126
font_01_sfnt_off000625ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x625EC 18172 bytes
SHA-256: 358aac4b50a25451d96810d5c7ba3acc13d76fa38316d96556fa9f447ee3ef63
font_02_sfnt_off0006547a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6547A 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9