Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5f849dc13c5e52f…

MALICIOUS

PDF

74.8 KB Created: 2021-07-04 05:46:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: a48f711ba8558b33ba1507cf7587530e SHA-1: 1129379d4d603c7158b38786597551edd3104b67 SHA-256: d5f849dc13c5e52fb90c66ddc60372c895641a7ef8bdf3bf1b0cb3f672e6fa5f
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it is likely a phishing or malware distribution lure. The document functions as a link farm, containing numerous URLs that point to compromised websites and disposable hosting, designed to redirect users to malicious content. The presence of multiple external URIs and link farm heuristics strongly suggests an attempt to exploit users by directing them to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8282

Heuristics 5

  • 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
  • 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://inwebjor.ru/uplcv?utm_term=moles+happy+as+homes+go+underground+answers PDF link annotation
    • http://ezibra.pl/upload//file/49638160511.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/l429524lsi0b1gcdbbkdmlhost/28251654845.pdfIn PDF document text
    • http://tokstar.com/_UploadFile/Images/file/38348882903.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8c251337e---tadajesubuso.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b1364119a7d---37753197892.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/cc39dea64fda60c2590483e13a3db95f/xopuvefebamunud.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/803e3df8c33609fed7a8602f5bc4e82e/36398065571.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c3d217c84e7---meborafavuruz.pdfIn PDF document text
    • http://carolinaboatclub.com/userfiles/file/rogeroxupexenipu.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/278ea75d95d125fcd8dde5f9366b7b87/ziwifokebirafalosur.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079a75064dbb---87805646710.pdfIn PDF document text
    • http://bhs-class1957.com/clients/35434/File/tifugidisi.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/0e9eea55f3b99db8ffb76247381fa0e8/83808735464.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/nunubiwakujoxutewuwejilar.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/a8b56c323048facd058174db3041d169/dopazini.pdfIn PDF document text
    • https://xehowo24h.com/images/ckeditor/files/migimaperaxinewa.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/81c847fd207cdc3ffe073b85b698ced0/sozekoditik.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/kewuv.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/on25iev5foft6l2l4pboloe6q3/14502187426.pdfIn PDF document text
    • https://service-panev.com/userfiles/42342192671.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/0941c7df570c71fe00efd33e9bac1fc4/61762120881.pdfIn PDF document text
    • https://bilegt.mn/userfiles/files/39762847824.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE19 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1