Malicious PDF — malware analysis report

Static analysis result for SHA-256 258f104b7c75d913…

MALICIOUS

PDF

406.8 KB Created: 2022-02-27 04:28:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-07-12
MD5: 596e7e2c54a5827f5a5abeea6ddc2cfc SHA-1: b1ceabcbddc6bea29523199b3492599fe38e8063 SHA-256: 258f104b7c75d9137abe823b165824c4be9a52675418f8158f854107ffe4aace
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to compromised CMS upload storage or act as SEO-redirectors, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. The embedded URLs are likely used to host or redirect to malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6946

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
  • 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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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=bluestacks+2++for+windows+7+ultimate PDF link annotation
    • http://floridadressyourhome.com/uploaded_files/userfiles/files/17384297289.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/8e1eddf92aad71e231cb2be00fd15e65/24022276483.pdfIn PDF document text
    • https://monceau.kopro.fr/userfiles/file/nijewowonefuso.pdfIn PDF document text
    • https://www.propertymegamart.in/admin/ckeditor/kcfinder/upload/files/zitaku.pdfIn PDF document text
    • https://gskrem.ru/img/file/tojexu.pdfIn PDF document text
    • https://hkparkkonutlari.com/image/files/datunukezata.pdfIn PDF document text
    • http://iwakuniyumiya.com/js/kcfinder/upload/files/12652684127.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/18683969949.pdfIn PDF document text
    • http://www.fbs-g.com/kcfinder/upload/files/30950106921.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/59438327648.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161908f6d8b25d---xapiv.pdfIn PDF document text
    • https://rmduncanrealty.com/userfiles/files/nudokufip.pdfIn PDF document text
    • http://101eyewear.com/luutru/files/molofomupapiribawofolile.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/161b540e22a245---mekawe.pdfIn PDF document text
    • https://aarhuskortet.dk/images/file/76341438236.pdfIn PDF document text
    • http://jfe.hk/userfiles/89498195973.pdfIn PDF document text
    • http://centrlita.ru/archive/image/file/tixamepapufem.pdfIn PDF document text
    • http://www.salda.se/saldus/kcfinder/upload/files/94799102038.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1620f1a2747120---88827885828.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612ac3874d499---25955489240.pdfIn PDF document text
    • http://caopump.com/admin/userfiles/file/64796732911.pdfIn PDF document text
    • http://maduraicaterers.com/app/webroot/js/ckfinder/userfiles/files/10496541591.pdfIn PDF document text
    • http://gift-founder.com/archive/upload/files/40175419973.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1618afbe017d69---raremofonifoje.pdfIn PDF document text
    • http://cappellastudio.it/userfiles/files/wakaf.pdfIn PDF document text
    • https://duproject.com/uploadEditor/files/31238997782.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/benofurinewov.pdfIn PDF document text
    • https://igruppe.no/ckfinder/userfiles/files/zipijebosevofivexizubo.pdfIn PDF document text
    • http://sozopolihills.com/userfiles/file/51886865986.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_off0005e3ef.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0005e3ef.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005e3ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E3EF 11136 bytes
SHA-256: 614bc42fbae681eb9917c020991fdfc64c78cc4f9c5ecc0d64fe33b0f8f8ca2b
font_01_sfnt_off0005fe27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE27 19960 bytes
SHA-256: aae0d81df09f84e94a4d4efc1c0fa441aafce81dbd1a456a4db82cb608f47e99
font_02_sfnt_off000632af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x632AF 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9