Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5468a3388a1a0aa…

MALICIOUS

PDF

89.5 KB Created: 2021-06-25 19:48:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: c796396043fe30131f10a789ed07ccbe SHA-1: 23ad0e14b9dd863d9e52f0f33a13faa2cb27b189 SHA-256: e5468a3388a1a0aaaf1b2953eebbcc4b53b8517acb854e6ca016443feeef4d34
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites and are structured as a link farm. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates these links are likely used for SEO manipulation or to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the embedded links suggests an intent to direct users to potentially harmful external resources, possibly for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b607aacb460---48897711429.pdf In PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/69b16f88f75b2a8d36b11703b59ca607/41090104068.pdfIn PDF document text
    • http://uci.ir/userfiles/file/37021439087.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/3sot435venf5751gganh49ln30/63773143430.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/u6f5ditqeo2mqe65tcif2rnjq7/9900900871.pdfIn PDF document text
    • http://aaykpn.com/uploads/editor/files/xikobuk.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/15fc1d246c31f8eb6e66513289e2483c/12914265508.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/b7dc2e5e0ccd59de30bf6b39fdfe12c0/redusezugetorurutop.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/47803e3a177eaf6acfa4705b886c8f54/vozidiza.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/955ae20794e27f8ec67302ee9d9f8f77/vokexumebevijik.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c2e2edb5a62---xijivogemolem.pdfIn PDF document text
    • http://sashtraayurveda.com/ckfinder/userfiles/files/39764476364.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/15f0f709575723cdd94fabe1de63d16d/94045728117.pdfIn PDF document text
    • https://mosallaesf.ir/uploads/ck/files/lemeturudavavopifaxas.pdfIn PDF document text
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/85813318715.pdfIn PDF document text
    • http://airholic.com/UpFiles/WebEditorFiles/file/sebugeritazimifivazem.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/sogawasalagurefobab.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16096dd9320cb4---bofemimesozovij.pdfIn PDF document text
    • http://landia-print.com/pdir/file/778161330.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ea66dadce9---61342359564.pdfIn PDF document text
    • http://passaicvalleyclassof1957.com/clients/44362/File/8989882712.pdfIn PDF document text
    • http://master-sign.ru/ckfinder/userfiles/files/luvatotapirineguzegig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=cost+management+accounting+and+controlPDF 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_off0000e685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE685 10844 bytes
SHA-256: 92d112f8a27b06a5c3240df871c7321a255d7005da081b9915189e19d438e1ab
font_01_sfnt_off0000ff4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4C 16232 bytes
SHA-256: bf3ac2bbc5511ca59b022801f68684aa2b8ae7661b1a55c6866fed5ae8d27d0d
font_02_sfnt_off0001152e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1152E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00012d40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D40 16504 bytes
SHA-256: beaf35d27fd1fb6614e20ef8e23ba081c2a553c327f832e59d9dc8c51f864513

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