Malicious PDF — malware analysis report

Static analysis result for SHA-256 68a687f1301a7220…

MALICIOUS

PDF

86.1 KB Created: 2021-07-04 02:11:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 8b98520f94328bce63b1bc05cd884ccf SHA-1: 3faf3352ca7449efe2eb99cc0be4323a88b346f0 SHA-256: 68a687f1301a7220ab3a7f56ae63b50811ac21c65ae478f1c9f836919d739769
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates a pattern of using compromised infrastructure for malicious redirection. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to distribute malware or conduct phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c918e607a6b---kumasibesagalokunofutikef.pdf In PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/081138c991e5a91ba270241fc09a7784/xinazajigajorudabopevu.pdfIn PDF document text
    • http://meskerjager.nl/media/files/48846871013.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/5hr5jecni85qikar61qok5b85n/lupej.pdfIn PDF document text
    • https://soalmatematik.com/userfiles/file/84067626416.pdfIn PDF document text
    • https://amblamy.ee/upload/file/88765618592.pdfIn PDF document text
    • http://bookblog.kr/data/file//files/ziwagupazup.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/2cbcfd17c29f1c6c68f2eb1e2a94487e/wepefuzosabivuviropu.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/93lg2mcta76pijf25grfm0c38t/ganibe.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9586a834a---28852761031.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8930b257e---zivobodagewur.pdfIn PDF document text
    • https://rijst.nu/userfiles/file/30493900418.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608def899d94d---sanirodexudifabalotu.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/91546899391.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3b4f3bf3d---88635443203.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/60e9b94386c083062599ff1768a63837/mumeji.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/10v75f45khatvjo0kp93o9da7u/70422300582.pdfIn PDF document text
    • http://zxpgw.com/userfiles/file/94349985810.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/cdjv0mabg3toc9hfgh1pv84in7/92239095849.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160aba41b4e280---94196031753.pdfIn PDF document text
    • https://elnativocoffee.com/silver/upload/files/94632593622.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/90f1f3f457aa7a5bf29bc6cbb8371994/25051787024.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/0e696ae01d3c3df3e8c984b7dbcfa8b0/53934676530.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1607e055d5a1f2---bejatejobakopaxup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=principles+of+counselling+pdfPDF 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_off0000f0c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C2 16328 bytes
SHA-256: d595d010172a71f9e242a38da191e229a79525abc9825bd245130b9a18254837
font_01_sfnt_off00011af5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001330c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1330C 10636 bytes
SHA-256: c147fe4431a14ea32e0e082f5a5df86ae92824ee7cc471883b3431aee06917cc

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