Malicious PDF — malware analysis report

Static analysis result for SHA-256 4259819b4ef09973…

MALICIOUS

PDF

81.2 KB Created: 2021-09-08 10:31:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-16
MD5: 77774eb9a1498447562a407f0c044bf7 SHA-1: 98810002cfe29e3fb776f1eb230845ad68ef0208 SHA-256: 4259819b4ef099732fc51eb495461d3260cf6e8f4259c366a223842a85a6dcaf
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://reelproductionshd.com/userfiles/file/kadeperimikepiwa.pdf In PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/cda5f620abc266efbf91a3d69177938b/81993972924.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/fktbjmeqvctqv17ldcvhteo380/xalovukefujutitedamisopi.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d122877744---5809239877.pdfIn PDF document text
    • https://topupdana.com/contents//files/babefagakimadiwuf.pdfIn PDF document text
    • https://magnettoptan.com/upload/ckfinder/files/23118391995.pdfIn PDF document text
    • https://copab.tn/216mag.svn/uploads/files/refulutagef.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/8e1cc0f558d864e5ec9051801e727f6a/sadofipuminimufer.pdfIn PDF document text
    • http://machinesupplier.cn/data/product/file/2021818_212721_135.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160793a4260085---gubosajafefapowikev.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/f511d0d080ac1da77c0cedc815e5515a/35497411579.pdfIn PDF document text
    • https://koncnc.com/genelresimler/file/43295213262.pdfIn PDF document text
    • https://digireg.se/upload/tixijuvoketiz.pdfIn PDF document text
    • http://abwlondonblvd.com/uploads/files/defelosuzawibevofakuxi.pdfIn PDF document text
    • https://www.tzounakos-insurance.gr/ckfinder/userfiles/files/mesomasituwoz.pdfIn PDF document text
    • http://smlstripedbass.com/home/rock/public_html/ckfinder/userfiles/files/dekizejukafakudoduwaxoj.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/42407245504.pdfIn PDF document text
    • http://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/12079535067.pdfIn PDF document text
    • http://smartarts.bg/userfiles/file/xerizozen.pdfIn PDF document text
    • http://fulepmark.hu/nyebu/fulepmark/userfiles/file/57130259106.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/c588isccfnnthipvsd346ameh6/gefapejepidorefizor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=basic+course+of+photography+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_off0000d5ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ede5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE5 11016 bytes
SHA-256: ddafec183d4d6f89438dcaa704d09f5d70cdfae17b9281c2f80abe98cef317f4
font_02_sfnt_off0001078a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1078A 18220 bytes
SHA-256: 21d23f7e1a7531a6be5ef3fa84f359af2bc78be920473663ae6de9c20437f83d