Malicious PDF — malware analysis report

Static analysis result for SHA-256 306c97ede8bbf2da…

MALICIOUS

PDF

90.0 KB Created: 2021-06-30 14:45:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: c6ae40807c9ef48d98ed4ec6af55cdb5 SHA-1: 617b5dbce1c66c687bd203e33efa44995c9a0ae3 SHA-256: 306c97ede8bbf2da7c5e093f9893d2a38dee267b7d79e439090a3184a002236e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, indicating an attempt to host malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607946aad5c1b---pijap.pdf In PDF document text
    • http://canxetaidientu.com/images/file/gisufunuzojuruvetoro.pdfIn PDF document text
    • http://kaithompson.com/userfiles/file/95273811739.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/15a8ca3df054f842ccdc7784b3182d8b/wowuvupavuwoziteziworirof.pdfIn PDF document text
    • http://polipack.ru/content/file/61704860946.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609181c681e81---vesipadidezokarefe.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607fea84ac3ee---4971358380.pdfIn PDF document text
    • https://gulyaskantin.hu/uploads/frontend/files/397943299.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/luferekavuxamudunufok.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073826275089---mubipotega.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/kepop.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/87340545960.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608d0b639bc4d---numigojotetaxo.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/73521623819.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/68f113ed8a114fc8fce9524e2b544546/60084325732.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609046518ab50---dugeves.pdfIn PDF document text
    • https://greenfuturevietnam.com/Upload/files/fupozok.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9805578c0---26464407643.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16074af6d7e303---78774931048.pdfIn PDF document text
    • https://www.djluk.co.uk/wp-content/plugins/super-forms/uploads/php/files/7kajn7gnf1a5vlesng4umu2hmq/51906985895.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/5uepmc9dn0qc3a7hk7ueq22ks6/dexapeketazubenejojige.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/d0889faa2086afff54950f0759f95f0b/vofebitox.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a1811630c9---xofawemegiri.pdfIn PDF document text
    • http://cerescommoditiesltd.com/Images_upload/files/rejiwosaridelabem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=tenants+rights+against+body+corporatePDF 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_off0000f94a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001115c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1115C 18244 bytes
SHA-256: d4e0f56b551662586e6d420ac51d1bdc5ae0f6a4fb5a12a1e9cb98d3c7ef8171
font_02_sfnt_off00013fc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FC9 10964 bytes
SHA-256: f1f1ac25323591365a3522c802508f4c898c3bb0480cacbe1a199568baf37d8f