Malicious PDF — malware analysis report

Static analysis result for SHA-256 726d6b7d96b27948…

MALICIOUS

PDF

157.3 KB Created: 2021-07-07 02:58:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 4642b4e10d7c14c4706756fac6fb3535 SHA-1: fe1df8a9b70c71cef32db7939b620ce7ab22cce8 SHA-256: 726d6b7d96b279489394ed4084915c6ada70f6a2b93d53f4b9ebb289ab44c46c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. While no scripts were directly extracted, the PDF structure and numerous external links indicate a malicious intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9811

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://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/ii5761u94rqe3m797ifjgnhi76/66725551331.pdf In PDF document text
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/renokuzog.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160bede9c533f5---14102002537.pdfIn PDF document text
    • http://brickbodysupplements.com/newerac2c/userfiles/file/lenasomawodagukefej.pdfIn PDF document text
    • https://resonanceacteurs.nl/userfiles/file/72641839707.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/bizokedib.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/1221247089.pdfIn PDF document text
    • http://medob.org/SITE/files/editor/file/zumububa.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/84cmu2s6pc6jq168cbhdbli2a7/93089111157.pdfIn PDF document text
    • https://apinero.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070411548917---57291727486.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/3e876fdac93c13fe0cc0556c7a47b47a/mirulaka.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/renalitizosimukalade.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/87qrdifb355c5kp8g221cngn46/biseluvafapexegunem.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d47a4d820---kidexajedafifajokaj.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160865505ba0bd---44590452509.pdfIn PDF document text
    • http://creative-format.com/upload/editor/files/fenifoline.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160adb0487b83b---23421381360.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/nhblvg4j9ggs17g7itfeqdshef/1934236021.pdfIn PDF document text
    • https://mimpishio2bet.com/contents//files/67059880521.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd696d467c---41186467118.pdfIn PDF document text
    • http://beateromer.com/bilder/file/61534978404.pdfIn PDF document text
    • http://hondaototanan.com/upload/files/vavezatulabotula.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=word+jumble+solutions+freePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B17 17660 bytes
SHA-256: ed304ddd82424d64e8355cfa00740146164b98ff27079c9a73d71ab22a38de96
font_01_sfnt_off0001394b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1394B 101420 bytes
SHA-256: 29ebb9f4b974bacb8efe291c7c50d78a0d8b92b2012a15c15b2db058ef1c866c
font_02_sfnt_off000236ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x236EA 10716 bytes
SHA-256: 0d4118f939e69c38e6766167b09a251f19f34bec8ba4b242848f30d1e04eae5f
font_03_sfnt_off00024f7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24F7F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1