Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb85977e60ef4843…

MALICIOUS

PDF

315.4 KB Created: 2022-03-19 20:48:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-08
MD5: d2121ba8da50e31cce3a92e26a8251f1 SHA-1: 92877d75ecdcf37c18568b26d266cce7d93feeea SHA-256: cb85977e60ef4843f5f7f74d25f27c0302b86f0f8a0b0920399341ffd62059ae
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7428

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=senorita+guitar+tab+sheet PDF link annotation
    • https://888nv.ru/userfiles/file/80079785017.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/16231d3e40b433---72762157291.pdfIn PDF document text
    • http://archive-2015.humandoc.pl/attachments/file/58376578217.pdfIn PDF document text
    • http://archinfo.ru/uploads/file/dumakex.pdfIn PDF document text
    • http://easy-maker.biz/upload/files/51652192402.pdfIn PDF document text
    • http://jungam21.com/upfiles/file/1646974090.pdfIn PDF document text
    • http://spartaksedlec.cz/spartaksedlec/userfiles/file/rokokusodaporezazilimube.pdfIn PDF document text
    • http://valk.dn.ua/js/kcfinder/upload/files/dafulexujozifale.pdfIn PDF document text
    • http://avsa.org/sites/default/files/images/files/zokidanuxipinel.pdfIn PDF document text
    • https://saleskerala.com/ckfinder/userfiles/files/35957311449.pdfIn PDF document text
    • https://dcimx.com/files/39088035960.pdfIn PDF document text
    • http://scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/5758906577.pdfIn PDF document text
    • https://gilbertems.com/videos/file/53088938403.pdfIn PDF document text
    • https://cometgroupinternational.com/ckeditor/ckfinder/userfiles/files/56375727275.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/nebofafekuxigatelevok.pdfIn PDF document text
    • https://infypos.cncmonitors.com/infyposcms/media/10524770827.pdfIn PDF document text
    • http://www.szinespillanat.hu/admin/ckeditor/kcfinder/upload/files/musaliruzakigeki.pdfIn PDF document text
    • http://www.guard.ee/kcfinder/upload/files/koxupet.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1620d38ea80501---xovezaxabufome.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/melagilobuzukosu.pdfIn PDF document text
    • http://yonetim.e-cari.com/upload/files/kugopebasapabutusuniguz.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/0eee78ac08bfaab12d433f0a0875603f/67821530759.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/b96ed2ecc604fc0c64f2d1c372690b2f/20279128564.pdfIn PDF document text
    • https://apsons.eu/files/file/42760663719.pdfIn PDF document text
    • http://umpn.pnl.ac.id/asset/kcfinder/upload/files/11615843913.pdfIn PDF document text
    • https://zenmobile.in/jaipriyart/uploads/files/wefasuda.pdfIn PDF document text
    • http://telesson.net/_UploadFile/Images/file/17305145305.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1622c0e32e3451---50340719152.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/tatuxijetusodakerin.pdfIn PDF document text
    • https://stmarys-perthamboy.com/upload/File/39572069812.pdfIn PDF document text
    • http://hiddengemsbookstore.com/userfiles/file/xetubejegudanebi.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_off00047fc1.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00047fc1.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00047fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47FC1 17716 bytes
SHA-256: 423c3493e12f31cb991866304167f9485d0217c10c596cf48ae19132c07b73f0
font_01_sfnt_off0004ae21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AE21 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_02_sfnt_off0004c541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C541 10656 bytes
SHA-256: 1d45feaf39bba5d50636468414553d5d0d5180d039aa62f9ded7630f790e1c6f