Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d972d5ecdc6e875…

MALICIOUS

PDF

87.8 KB Created: 2021-07-02 17:45:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: a72efde7bfa81cbdce5984f7eb43b9bb SHA-1: 94dd9513d0458f18f59b37e8c77b5764eb584edf SHA-256: 7d972d5ecdc6e875cc6091c25446aa06d242ff01607c86560ffccd7261080073
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely contains exploit code. It functions as a link farm, with numerous embedded URLs pointing to compromised or disposable domains, suggesting an attempt to manipulate search engine rankings or redirect users to malicious sites. The presence of external URIs and link farm heuristics strongly supports this attack pattern.

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://local-minicab.com/survey/userfiles/files/polumerosokijapewes.pdf In PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/bpp347b99vr6cmq6b9e76e7do0/66620847719.pdfIn PDF document text
    • http://pcwenhua.com/uploadimg/file/1623905201571308219.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607250e8e5533---nemizajizulafuxixonizu.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/fd0e329b0064fc3b431ffe8995c1d30a/75471980313.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d2d8a6e57---ditodavebolijowokovun.pdfIn PDF document text
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/27901c51359b4ec65cdf8cd5ed7073c9/65508500403.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bac083eae7c---99087705766.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/d1c15d7acdfc0a53f35658c85182f0c4/towinidatamikosinifakibi.pdfIn PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/xonuza.pdfIn PDF document text
    • https://szabobuszrendeles.hu/files/files/zeresuj.pdfIn PDF document text
    • https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/sk2ic1bd7ueccteafnudofkcvq/wizuvabevawuxipomatexefu.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607855f88be55---66147712343.pdfIn PDF document text
    • http://cdhsalumni.com/clients/28864/File/96034198192.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b55ec706b3c---bugawuporinegopekavuvu.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/vulovoravasup.pdfIn PDF document text
    • http://dioceseofniranam.org/userfiles/file/20523619262.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/3gdu0s5lukupqo78ofp6fia1q1/41978607680.pdfIn PDF document text
    • http://wrtour.com/FileData/ckfinder/files/20210702_89E85872E0F3BAF5.pdfIn PDF document text
    • http://sonnenheizungen.ch/fckeditor/editor/images/file/wurez.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/41647450817.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf1b8c9b37---30435193503.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/8d0c311decc2467b84cfada1b7986d48/xizizasedidazisolelabefok.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606c786901749---zilukewoludujimo.pdfIn PDF document text
    • http://yangpupark.com/uploadfile/files/32729140897.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bcadbd5541---bosirikeguzuwomotan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=spinach+and+paneer+curryPDF 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_off0000ee0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0B 19072 bytes
SHA-256: b535154bd2b89b1c68e17e973119f32713aef36f257bb6996308fa97fb6d6d4f
font_01_sfnt_off00012085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12085 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001389c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1389C 10468 bytes
SHA-256: 48b78e4db4d0fe2890c8e417b22e38e1cef9e858bbc5a7cb405a2f38b7d203b7