Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d98c24cfb9d9b8…

MALICIOUS

PDF

71.8 KB Created: 2021-09-25 01:01:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-28
MD5: 5fe00382aa3412f9bca8f3253692e2a8 SHA-1: 7d09006a9e2dc14ed989d35fe61edb9f0afa8579 SHA-256: c5d98c24cfb9d9b842bc0f1cffadd721fbb28c0d1b0d9ae4f59f3bde7f616cbe
164 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://freeorden.com/media/file/jekenudanipi.pdf In PDF document text
    • https://eltdb.com/UserFiles/files/lezipokebubofut.pdfIn PDF document text
    • http://veterina-hrib.cz/user-uploads/files/zotewedozirovexajawukimim.pdfIn PDF document text
    • http://aqua4you.hu/userfiles/file/xevewotetupofim.pdfIn PDF document text
    • https://apartmani-mestrovic-krk.hr/files/1339293806.pdfIn PDF document text
    • http://luyutea.net/v15/Upload/file/2021920180581521.pdfIn PDF document text
    • http://goopenapp.com/uploads/files/rifufonefav.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/5bl52ssgaal998dfdpmr4el8k1/xodipasolotej.pdfIn PDF document text
    • http://chinhlytailieuluutru.com/media/ftp/file/zarerologut.pdfIn PDF document text
    • https://encoyun.com/calisma2/files/uploads/25521696790.pdfIn PDF document text
    • http://denetimmusavirlik.com/userfiles/file/bogesefawixizaf.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/161372dfa29d4c---lexubisojatomipijav.pdfIn PDF document text
    • https://soalmatematik.com/userfiles/file/47811945420.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/161359cb3987db---jukaboguxoga.pdfIn PDF document text
    • https://zhansq.cn/upload/file/96096394168.pdfIn PDF document text
    • https://dimensionshoppe.com/alpha/ckfinder/userfiles/files/rebofutapefila.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613bf9c3b9958---kizowopi.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149a141c244b---7122288507.pdfIn PDF document text
    • http://dynamic1984.com/user_file/file/noxafodabusi.pdfIn PDF document text
    • https://matricula.arendic.cl/files/kizidil.pdfIn PDF document text
    • https://parkerboat.hu/js/ckfinder/userfiles/files/30223875543.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16133db0f616be---ronivurozuwogewapekuga.pdfIn PDF document text
    • http://h-n-s.net/userfiles/file/6035855481.pdfIn PDF document text
    • http://gtlitalia.com/userfiles/files/19632960320.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=introduction+to+space+physics+pdfPDF 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 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_off0000b567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB567 10836 bytes
SHA-256: 91e21e975fa6615abfc5a8021ab94c6cc1320432bd9d64cb7cf2e8e279a60557
font_01_sfnt_off0000ce65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE65 16596 bytes
SHA-256: 1f888f463a8b6f3215f135615b7079cf1b64ba6e5a45840a065c6c8079b8938c
font_02_sfnt_off0000f8f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1