Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f90fadae5d2b8ef…

MALICIOUS

PDF

79.5 KB Created: 2021-06-28 19:12:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: c1fe4ace34642000d889a0d03fab0112 SHA-1: 26ce42a1e57567c55f082c9e1fe740ab9f357ce7 SHA-256: 2f90fadae5d2b8ef4b198b556a3ab506e3366b50fbb70c521a7ca2e53282c879
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of external URIs, many of which point to compromised WordPress installations. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm on disposable hosting, suggesting an attempt to lure users to malicious sites. The ClamAV detection and ML classifier further support its malicious nature, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://infrive.ru/uplcv?utm_term=judge+gary+darby PDF link annotation
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/5c74b8058025eaa586b0cf3c604d3c2d/wawuxeke.pdfIn PDF document text
    • https://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/30c9621a0daba95d1e47ab856a113bc6/20294534250.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/1566ee1ce4a58407308d3180963fe6ed/40364293516.pdfIn PDF document text
    • http://guides2alpes.org/uploads/file/gerolojaxigedo.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/384e8f1e20341f397098bc6d8cde8fe3/dixud.pdfIn PDF document text
    • http://topcudental.com/img/userfiles/files/rebogexunojoputenagopex.pdfIn PDF document text
    • https://nabsangram.com/userfiles/file/jidozekamudomusopebavif.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee8304014e---sevomogibuxodipa.pdfIn PDF document text
    • http://www.cbs-emballages.com/upload/file/2235006304.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160825345b1878---sijezudemonadefanezadud.pdfIn PDF document text
    • http://hum-lucknow.org/test/fckeditor/file/gogeliweregamebezugobigex.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfe170da74c---47096477745.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/26208675684.pdfIn PDF document text
    • http://yjsyrj.com/userfiles/file/rebadik.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607249a9120ae---75752809202.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c62a0c61fe7---vafaxenowixufapel.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8e63f0b58---gujowuriwunive.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b490ca6e3---98334529997.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/73659eeda377053580076be7c7e728e5/81683836205.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/57471482653.pdfIn PDF document text
    • http://tuhs1970.com/clients/a/ac/acc339db084e87cdfae31a76a6c96f1c/File/zorijogu.pdfIn PDF document text
    • https://investmentskillsgroup.com/images/userfiles/file/92118388136.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/fccd4bf8471ecdb97d4292827e0cfcbe/pifobinezaxitosam.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/6a73f7a58a4b2617bedae9895031b688/93353667576.pdfIn PDF document text
    • http://vuatoyen.com/uploads/userfiles/file/38003784008.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/b2d610cf90d42e0706b9f2edd1feccff/kuzorekobawuromewaba.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/cbfb4ce05b34a0a3ab65341658c7dae7/55936262516.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_off0000d618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD618 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2A 16752 bytes
SHA-256: 0edc44fdc559b0d4bb2d8365d1dc44d8491bf4225c82f3d92316d7e57d1d73f9
font_02_sfnt_off00011a0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A0F 10140 bytes
SHA-256: 51fabd039da6eb09eb04920dbee91f65a42aba2f44ab471505d26c5d9377ad8c