Malicious PDF — malware analysis report

Static analysis result for SHA-256 607a3f7483770f0c…

MALICIOUS

PDF

92.1 KB Created: 2021-06-26 15:56:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 1272dfbefc2480af9e4abd5226cdf6ae SHA-1: b0768d5f5a2fafbef24296fc5e643b5b185a4960 SHA-256: 607a3f7483770f0c9d9308622aa63b85c001da2fc35a3e67f1852a08af8e8fb1
156 Risk Score

Malware Insights

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

The sample was detected by ClamAV as Pdf.Phishing.Trojan and an ML classifier flagged it with high confidence. Numerous heuristics indicate the PDF acts as a link farm, directing users to compromised WordPress upload storage and other disposable hosting sites. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16083297a727d4---vapedikimaxu.pdf In PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad29652a6a---kapefusebipiwunezaduna.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/859d28b188c18a13202e3427beec52c1/dovojugu.pdfIn PDF document text
    • http://suapaiatuipelehakefamily.com/clients/80707/File/tagugasazex.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1609834ae77beb---59710108608.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/winujatuxagivorupikewogup.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/57260560768.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/e47fbc481eb56e316c05f29ab324a103/gilereguzoge.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///2021060664614_524238660.pdfIn PDF document text
    • http://walkofagesvt.org/clients/0/0e/0e42319052772b195a43ba3ede0f03e0/File/fiwarubafamoki.pdfIn PDF document text
    • http://patroha.hu/file/80280701858.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/9efa53f700953ee8de2fdf23d1845b11/40707043755.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ba18703ea---lazoduwegotisagigit.pdfIn PDF document text
    • http://apricomm.com/userData/board/file/71420492545.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/29dd01fc341e22f31493d77dd6dfabd9/dexigegeruwovuwokekonifat.pdfIn PDF document text
    • https://autoprofi.ua/userfiles/file/xetunujojifojovaxeme.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160897aa8e1e91---dujaximakazamaw.pdfIn PDF document text
    • https://editions-tlp.fr/ckfinder/userfiles/files/guxata.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16092e57de90cf---daxisopokebekor.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/4vk9aob8l941u3l278s1862vt5/zunorobigoro.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/bmjdqtin0gkqe18s8vjsoq6p7a/pelutazevod.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/f6de3faa6cc94cc4e6da07c17f27eafa/60117576676.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091b916dc052---xetifigulenir.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/xupazetufurimet.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160caff19d1ee6---94070242540.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=orlando+bloom+lord+of+the+ringsPDF 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_off0000f642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF642 29680 bytes
SHA-256: 3f5acc344a7cb7744246ee253c2eb2053788e742a1ab9e56ec81530b5a29ac8c
font_01_sfnt_off0001321d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1321D 10968 bytes
SHA-256: b207da0b4e2c9fa2a930fac3b00d3e1b32c687b39a0336da0375e6ea39312b95
font_02_sfnt_off00014b22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B22 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1