Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1adae85012587ab…

MALICIOUS

PDF

74.3 KB Created: 2021-07-09 19:42:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: dd9f063b084147ef7239034f786a14a3 SHA-1: e0f95859e1daf5010f592996eabd879bf16f7ea1 SHA-256: c1adae85012587ab6a1aa705f32e6d2aac161f4ee92e714fe7a98836a3728ecf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, indicating a link farm designed to distribute malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification further support its malicious nature. The primary attack pattern involves luring users to external sites via these links, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.
  • 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 https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4e1c718037---fudofeginidakazu.pdf In PDF document text
    • http://honyi.tw/ckfinder/userfiles/file/diwet.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/zexepewuwuzesajaxik.pdfIn PDF document text
    • https://bursakaynak.net/userfiles/file/kebewajalaxadab.pdfIn PDF document text
    • http://terralindahigh1981.com/clients/866868/File/xutebilazutigujubusa.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ec4a64afc---8921656277.pdfIn PDF document text
    • https://lawweb.info/mycms/admin/userfiles/file/dimuvonotexubapizajut.pdfIn PDF document text
    • http://xn--80aaa1acmiejxr6d7fg.xn--p1ai/data/files/ranaxataxez.pdfIn PDF document text
    • http://auburn-properties.com/userfiles/files/3299298974.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/bc4c27e41579e874e0292d1c2c50b40a/97925829886.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c5d08848d---80165558919.pdfIn PDF document text
    • http://luberoff.com/userfiles/file/95081714863.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/8de55d5389ad04ec6e983a84fed7e271/33483144749.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/930d2131860b5b76bd1f63a5258258e7/kobulaz.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-5-1/20210501072835416520.pdfIn PDF document text
    • http://lokale-uzytkowe.pl/uploades/fckeditorfile/wegimiginojinijeva.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608e508ee8950---31917938096.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/zewasefi.pdfIn PDF document text
    • http://esebtekstil.com/resimler/files/fopavijenesovidik.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e7960f5c7---zuluvojuroluz.pdfIn PDF document text
    • https://comobrew.com/newsite/images/user_uploads/file/77423267253.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=cathedral+school+of+st+john+the+divinePDF 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_off0000bfd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFD2 10800 bytes
SHA-256: 0eda91a1b9b9ff44c9cb48ac686c52c7c1f2c19f8d81e9c8e90e67fcc3a811e9
font_01_sfnt_off0000d8a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A6 16556 bytes
SHA-256: 6bff1d48fd5997f897aaab11422931a229ad17ee8bae090e72e718006413bb20
font_02_sfnt_off000103ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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