Malicious PDF — malware analysis report

Static analysis result for SHA-256 4451d0b032ee51e7…

MALICIOUS

PDF

397.0 KB Created: 2022-03-22 13:51:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-07
MD5: 9c69bc2b34a3e47f6123babe6f1b3d3b SHA-1: 636ba7a49590be4c241b56e9d40f4dada036a056 SHA-256: 4451d0b032ee51e7d9d2042d1ed80559e6b6579f831d0fb1358db31d5e5c8bf0
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7309

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://fecuq.co.za/XSRYdR1H?utm_term=ejercicios+de+acentuacion+diacritica+online PDF link annotation
    • http://medicapoland.pl/uploaded/file/sogofaluxosuwavisesaketof.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/6c369337b05dee52145fd818444dbdde/gopedetuposakewijorepame.pdfIn PDF document text
    • http://carcrome.com/userfiles/file/piligilusugilesixo.pdfIn PDF document text
    • http://englandmatchshirts.com/assets/file/jagakaguvumenasezonapus.pdfIn PDF document text
    • https://www.singaporemedicalclinic.com/ckfinder/userfiles/files/fupivenoritewibirazogi.pdfIn PDF document text
    • http://artesaonato.art.br/kcfinder/upload/files/74027663816.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/94805276318.pdfIn PDF document text
    • http://skisun.it/userfiles/files/suwavunoxoboji.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16233bf7244773---10334525505.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/21572452211.pdfIn PDF document text
    • http://chernogolovka.inhome360.ru/admin/ckfinder/userfiles/files/93479986691.pdfIn PDF document text
    • http://www.globalconference.info/kcfinder/upload/files/22060813499.pdfIn PDF document text
    • https://kvizek.excore.hu/ckfinder/userfiles/files/41547498985.pdfIn PDF document text
    • https://www.utn.ac.cr/sites/default/files/files/rawopupubigixelajamer.pdfIn PDF document text
    • http://servetgumrukleme.com/kcfinder/upload/files/zefilalarag.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/f3n6tgng74q2mrtp5q18aguu4q/wevononokesopobujopu.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/162389e3623e0c---88283329560.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1621f088a2f45a---xuvudazun.pdfIn PDF document text
    • https://filmari-arad.ro/files/file/pifabupafafeduv.pdfIn PDF document text
    • http://moonlightmontessori.com/upload/files/39350964550.pdfIn PDF document text
    • https://ehilteknik.com/uploads/files/98742725524.pdfIn PDF document text
    • https://buildingexpertsdirectory.com/ckfinder/userfiles/files/didusaruloligebar.pdfIn PDF document text
    • https://mkycc4.com/kycc4.com/userfiles/files/80003057888.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/468b6715324d261b89d9c86a563ad117/43552770627.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 PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005c21c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C21C 20112 bytes
SHA-256: 0ea63db23a02a1abeae053bc8f01b4dc95170370a3ad9448d214a6d69e6a3417
font_01_sfnt_off0005f56c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F56C 10576 bytes
SHA-256: 92acf38193a2be372cc50203aa20e2831f8a15f7353b0342eee4efa0bab469fc
font_02_sfnt_off00060da6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60DA6 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9