Malicious PDF — malware analysis report

Static analysis result for SHA-256 97241ad84a47ade3…

MALICIOUS

PDF

85.1 KB Created: 2021-06-26 17:55:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: c8e8c37853954dcb0e4fc86c7c5f1c2a SHA-1: 939ff4ac124e27e3d62a8b9e29fc573d2a30db2d SHA-256: 97241ad84a47ade31b07bd51837bf8c6f60f22da0370b5247b963620396ed25e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Several heuristics point to the document being a link farm, with many URLs hosted on compromised WordPress sites and disposable domains. These links likely serve as lures for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/dmtp0tbonmfc38hkv13h6j5r1m/51214021013.pdf In PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/605c258ad1ac1524b4ec38d8b54e10eb/92268518734.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/lari5lg9p9ivbh6g1thu68s162/dirivisumojexidigonijuz.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/28279134591.pdfIn PDF document text
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/47b74af75166736747f1b1ec95cf79c5/nosur.pdfIn PDF document text
    • http://gfb.it/upload/fck/file/mumununisax.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a22e691a85e---88036435625.pdfIn PDF document text
    • http://pattarasawat.com/ckfinder/userfiles/files/netufexikox.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/926q2qmeechog25gmrt3j59ih3/jiwap.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/525571614e800ebbc81776d3f11c0d7c/nogomifamomoveje.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a64a3ebabca---gobigu.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb79a72176d---53159042379.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/bawulapulonemubuxu.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/0d6d875f56140d4e85958b9f221f4874/kajorawatozidinabobebi.pdfIn PDF document text
    • http://ambulanceservice.pl/userfiles/file/gubirurokukanororukopado.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a03300dec2c---gazakusojijugojup.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160801aa41ede4---48774181491.pdfIn PDF document text
    • http://esejsc.com/upload/files/82612728605.pdfIn PDF document text
    • http://dedanskecasinoer.dk/userfiles/file/farorexisejikixekam.pdfIn PDF document text
    • https://hogozaty.com/ckfinder/userfiles/files/gozurafuwitekumudikudov.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608442cc99dd7---88215731528.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=what+does+mr+jones+represent+in+animal+farmPDF 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_off0000e954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE954 17160 bytes
SHA-256: 71a967bd9357c63b60cb39e8e4d481ff1f173516b73a081d033e416a4ec336ce
font_01_sfnt_off000115ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E03 10888 bytes
SHA-256: 86416720b7f442f49a114ab2fe558f06b4625c6108c60406c479b0e770126c49

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