Malicious PDF — malware analysis report

Static analysis result for SHA-256 db65ccafb292c766…

MALICIOUS

PDF

90.3 KB Created: 2021-06-28 21:28:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 06edad42a99e7c0d4e8aef41b95d62fd SHA-1: a782ddb0fba41a7508580ec5918481c8d10cbf3c SHA-256: db65ccafb292c76615b8478b2a2aea7b70b7ebca86ad35885d9e626dbf1aed26
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites, likely serving as a distribution point for further malicious content. The presence of multiple distinct hosts and the use of formcraft/super-forms plugin uploads suggest a coordinated effort to host malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e33c41c62a---bevusubowezikev.pdf In PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/6563995364869ed4ba7e80c094b4b6a1/viresot.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/40049b08f65381cb92aa3e98db183181/gobexuxelisawedubepu.pdfIn PDF document text
    • http://makingtheturngolf.com/clients/9/92/925d9bae4ecf380f28dbe0e1390c16eb/File/melujajifupibivo.pdfIn PDF document text
    • http://fusen-es.info/yamituki-n/uploads/files/zawoneb.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c5b48226cf2---38174706399.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/4300a8bb7ba5cff489cd80901968bbdb/37093721874.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210506021602146.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/6628c574f7881d65da72c231e993b62e/6020067708.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c81c613f23---tigavirejaxamaru.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/jecoi9ecc4naps3bc48codo544/mexaxirepaliv.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160898411b3873---desugozogibepebenu.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/7b8221bb723f3cf462b6c10caa65c877/98675374344.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/bc5036d4175e50db82eb55423cd64a34/xalonexepaziwubef.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/lfkrq2eijkon47t3g7etp03dkb/54274598322.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/19250843576.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/vivexoxonolupened.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/86100450101.pdfIn PDF document text
    • http://kemenyseprosiklos.hu/upload/file/muxitifewo.pdfIn PDF document text
    • http://bahattinburyan.com/userfiles/file/fonefenufawo.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4d0b9af51---95609709635.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/5caecb385e1e5992be19f1a306f023a1/73357012568.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee523cdc37---66161121700.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/fa3eeed55a184693fe66d457f62ca37b/fuzare.pdfIn PDF document text
    • http://konemara.hu/userfiles/file/lazawesufa.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/37477543431.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=baby+pig+costPDF 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_off0000fd23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD23 17568 bytes
SHA-256: 0f717dfbb6331b73a991042d4bc5b52c4388c0755bb01eb7abd6b23d8ccc8f8c
font_01_sfnt_off00012aef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AEF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14306 10472 bytes
SHA-256: d97dd044f91343c6f09505abd872bac80a776bfa65c0281581a1465974233910

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