Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4fdc0e2d5dc2ac1…

MALICIOUS

PDF

346.0 KB Created: 2022-02-02 14:47:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-07-01
MD5: da5b90d533fb1abf5023f8490f6ebdb0 SHA-1: cb258dc1d45e99065bfda4e6e76de0d19b5b2868 SHA-256: a4fdc0e2d5dc2ac1d057af22e95e4fa070e2b1a6a88f518ef8843ad8e593306a
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.6763

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 https://colod.co.za/XSRYdR1H?utm_term=builders+developers+company+profile+pdf PDF link annotation
    • https://trubaopt.ru/content/file/57561343820.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/fepuvumufedufebofusazoros.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/rufima.pdfIn PDF document text
    • https://tiger-security.net/webroot/upload/files/57888995623.pdfIn PDF document text
    • http://belniig.by/public/file/nefivujesolofukisuridojad.pdfIn PDF document text
    • http://flyingkirin.com/uploadfiles/file/131947418950.pdfIn PDF document text
    • http://yilip.net/userData/board/file/31842183247.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615d1b81e0387---34914964618.pdfIn PDF document text
    • http://sasme.cz/uploads/articles/files/da5b105ad30028c9005ce7c65a277987.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/28527868759.pdfIn PDF document text
    • http://cbstav.cz/file/26884313736.pdfIn PDF document text
    • https://worldcastlive.com/userfiles/file/pelurepibi.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/161b96d3d76e01---mepobiveporur.pdfIn PDF document text
    • http://labradory.pl/file/8768386548.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/pc3kptnl260t2fd0u8q9kk3u50/8350037371.pdfIn PDF document text
    • http://www.yankey.com.tw/demo/public/editor/ckfinder/upload/user_upload/files/14757823200.pdfIn PDF document text
    • http://buyyoutubecomments.com/ci/userfiles/files/632478573.pdfIn PDF document text
    • http://teknis.it/userfiles/files/suzavatunisifatazet.pdfIn PDF document text
    • https://autopsrus.com/ckfinder/userfiles/files/80478603155.pdfIn PDF document text
    • https://jogamiskolc.hu/ckfinder/userfiles/files/87406248708.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/caa2c193aba345c71f628ca28596141d/35785374798.pdfIn PDF document text
    • https://alhasooncorp.com/Files/files/77920814453.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160f2298d5a546---likefapuwuzomilagelasali.pdfIn PDF document text
    • http://panyuchen.com/ckfinder/userfiles/site_eachfun_com/files/51590088136.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/1b158f6286c2504bd33397ee49bc0c9b/velituzexulikeref.pdfIn PDF document text
    • http://turnkeyparts.com/site-uploads/58687752776.pdfIn PDF document text
    • http://studiodugnani.it/userfiles/files/1615911963.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://dejavu.sourceforge.netIn extracted file (font_00_sfnt_off0004fbc7.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0004fbc7.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0004fbc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FBC7 16820 bytes
SHA-256: 3e463ca2131697b99d7f3ce920861c093f20dbe8feb6797e252250fadd91e696
font_01_sfnt_off000527bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x527BC 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_02_sfnt_off00053edc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53EDC 11016 bytes
SHA-256: 26359a4b63c5fddd7d044ac8437040c5ed10d0e0cdcde023f0722dc4e614370d