Malicious PDF — malware analysis report

Static analysis result for SHA-256 fca8e09857f31c94…

MALICIOUS

PDF

85.6 KB Created: 2021-07-10 06:30:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 6685746b29afd3333929b2a6582e086a SHA-1: 3f1a4b36596f1fe1041094b81556c3f01a028d6b SHA-256: fca8e09857f31c948dee1f5bf5d3749fcff60975a6a7ba524904b331fb010086
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous URLs pointing to compromised WordPress installations and disposable hosting, suggesting an attempt to lure users to malicious sites for phishing or malware delivery. The presence of multiple distinct hosts and UTM parameters further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://irlanc.ru/uplcv?utm_term=types+of+type+casting PDF link annotation
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16077e6781500b---45209658157.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc7c0756bc4---49031009912.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/283142a9bb3ead8606d4c93a53ccad25/17655164059.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/86823969584.pdfIn PDF document text
    • http://ezibra.pl/upload//file/9979920910.pdfIn PDF document text
    • http://oodow.cn/upload/file/210627152921034942v95g3gemf67e.pdfIn PDF document text
    • https://mednet.mk/public_html/upload/userfiles/file/86527070565.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/xoxavod.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/67360704938.pdfIn PDF document text
    • https://vieclamxaydung24h.com/upload/files/72545751598.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16078f7bb1e9d7---31476736158.pdfIn PDF document text
    • http://wisdomtours.net/upload/file/50728779212.pdfIn PDF document text
    • http://farmaciacogliate.it/userfiles/files/86033422219.pdfIn PDF document text
    • http://newgrids.com/userfiles/file/fibowexa.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d82f4ead97---bopodupogapopa.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/73327875900.pdfIn PDF document text
    • https://comfortinnbarrie.com/phpsites/vertical_living/uploads/file/kokira.pdfIn PDF document text
    • http://enotecagaribaldi.it/userfiles/files/zefubufoloda.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/16098c2795c65e---magadite.pdfIn PDF document text
    • http://zeroseistudio.eu/userfiles/files/nimukatizoduxasotetupam.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/aec2fc1385068c42e8d67ae92d3e0d07/89018261700.pdfIn PDF document text
    • http://clinicaveterinariabilancino.it/userfiles/files/tetakizusidamepuka.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7b96b23062---jofuxivetawunaxirowux.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/7532171b2a1e3badf5403e14545d1688/siwaxudabofupogesolerasab.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf58f697c4---77517753013.pdfIn PDF document text
    • 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_off0000eca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA5 16968 bytes
SHA-256: 0903caf37654328fee6b96bdeb940f9b8ba1131963d332966881986b5eb4ca81
font_01_sfnt_off000118a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000130ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130BA 10584 bytes
SHA-256: 2c471e1024ffd4ceaa3bd1d0a69514a1eb279d04d3f96aad5fcb626baf7b1497

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