Malicious PDF — malware analysis report

Static analysis result for SHA-256 d26f2eafa026afde…

MALICIOUS

PDF

80.9 KB Created: 2021-06-30 22:33:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 56b8b9159075d59183ca3f12761660b0 SHA-1: 4e1173abe3a8a34d89cee0f73d2fe043c2a0f00d SHA-256: d26f2eafa026afde0d68ebf4fc5f152184115d91c48528735bccb2d2470b7310
184 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress sites, suggesting it is part of a phishing campaign to trick users into downloading malicious files. The presence of a visual download button further supports this lure. ClamAV detection and ML classification confirm the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/d618741fdfd1bfee9556608726a22585/28370851069.pdf In PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbf78ed1910---vagojepovu.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0a085cf09---koxivepuzemimowuzo.pdfIn PDF document text
    • http://hjtech.org/admin/upfile/file/45281101566.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/0eekb94nldkte00l3cufhf5kcc/45293146564.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/897b565e28419952bd5ce05b0c665b63/vomopov.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/88009390003.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a6eb0edda15---54139007926.pdfIn PDF document text
    • http://kozszemle.hu/uploads/files/toziwatobarozarewup.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/51uk9jcqoaf2uqkrfj81qh7e05/jifopesutavafumenemodumi.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a705c6be0aa---xemezimorolivilokobegop.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a983858edec---degatugivoj.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/6464cca5f8699320cfa0a257e3d009da/68425588624.pdfIn PDF document text
    • http://bezagsecurity.cz/userfiles/joruto.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ca8ba6cc7---wirurejusibutexuzilipew.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae77fe2461e---59439194165.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/4chcsa2m8daqsnpvvbanqe0mu7/347832872.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160770ee845d5d---75035845899.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb3a18a3ba---29801451985.pdfPDF link annotation
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/7b4b95da1e5db4d3acc357c2553b76d3/tigajek.pdfIn PDF document text
    • http://petrduchek.com/files/novazevi.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/77312de0d959abaa1b6df9a05644f467/denojegevavigiwipomexunav.pdfIn PDF document text
    • https://0a3exp.com/upfiles/editor/files/sozojadinok.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/f1oni81r6kmgf9mq5vpsugbhpv/91628682535.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=application+form+no+4+for+driving+licencePDF 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_off0000d72c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD72C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF43 10920 bytes
SHA-256: 20e9fc258718f13faa736b7b8f8cd05a5dfe1076aeac8d85986cadc335d3a0bd
font_02_sfnt_off00010871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10871 17436 bytes
SHA-256: 87c8d72fb2e9b1954f1bef0b75f4e9a73e8086a8387c7d91247e667dfd9027ee

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