Malicious PDF — malware analysis report

Static analysis result for SHA-256 0815d597a0099b22…

MALICIOUS

PDF

136.0 KB Created: 2021-07-05 13:05:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 6e5e31e23b5e3d253b5ca663bc5ccacf SHA-1: 1385a28fe9be3d318dff0e5b510d9c0b9cae5333 SHA-256: 0815d597a0099b2260decd677c924c95a6d4de57055e49007d1efc9eefeb3548
156 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm on disposable hosting, with many links pointing to compromised WordPress upload storage. The embedded URLs likely serve as lures to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160773edc8fa7b---53236008791.pdf In PDF document text
    • http://hesexpo.com/img/editor/image/file/watetopuxudadoro.pdfIn PDF document text
    • http://degeninhotel.ru/admin/ckfinder/userfiles/files/3982406303.pdfIn PDF document text
    • http://canvangdientu.com/images/file/mixuxirunivawowomopejiv.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/d0e46f3848a0f675617264abfa16f3b7/borezepidewemedewe.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/16089344f77e1e---67865196337.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/tumifosasijomubatube.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/tpc5vhgo0b1r14nf2rbishbac3/topujabus.pdfIn PDF document text
    • http://bioscipublisher.com/files/upfiles/file/bufafexubus.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160afa5c7f3f55---pusutiniv.pdfIn PDF document text
    • http://arenabilardo.com/data/_files/wuwagegagasuvelekusuma.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16079143d64fc5---livijuromon.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160e1235b87826---luvup.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/c22klh53d30k44lopqmvghfbk1/fulobajutesevivuku.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160777e693d4f1---kamifufoxaxajivowev.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160ac02ebe8655---62327028413.pdfIn PDF document text
    • http://didopack.com/files/9746351233.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/pvqbevtek7j95rr24igg6fmr2l/62653881618.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202105040005314278.pdfIn PDF document text
    • https://jerseyshorepirates.com/userfiles/files/84515001995.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/b1110bc961f2f083d43de8f88ee5e9a9/parekaxuzarugapoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=gas+chromatography+is+used+for+the+measurement+ofPDF 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_off0001af5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AF5A 18252 bytes
SHA-256: 6751e464f3edcd23df63a7f4a3b68103c62f87f4c980695202a5e4683fa5b8fd
font_01_sfnt_off0001dfec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DFEC 11276 bytes
SHA-256: 4ac6feb7028aff6ec2060dfcb7cd0a6e001ecd5aaaa9360d5829ca315a026dea
font_02_sfnt_off0001fa22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FA22 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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