Malicious PDF — malware analysis report

Static analysis result for SHA-256 93bf3c9937310e81…

MALICIOUS

PDF

80.0 KB Created: 2021-06-27 08:09:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 80b7353d75c3699af4fe4e07a0f379ca SHA-1: f5f8a0cb964bffb30f323d54865923165817ea90 SHA-256: 93bf3c9937310e8159a81672c9a714266d79188b18ac7732dd391b8e28424724
124 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and exhibits characteristics of a link farm, with numerous links pointing to external websites. Several of these URLs are hosted on compromised CMS upload directories, suggesting an attempt to distribute malicious content or conduct phishing. The PDF's structure and the presence of multiple distinct hosts indicate a deliberate effort to create a deceptive link farm.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2676

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 http://morethancars.nl/uploads/edytor/file/42706824173.pdf In PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/17a00d7e0817abcd459f02ef15842bb1/8372936918.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/1e1dc098cf8fd54820931866391e6ccb/41856552380.pdfIn PDF document text
    • http://hzbmsj.net/images/upload/File/52366463543.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609b187964e94---49669554816.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160792508b7cee---bodinasaviloruka.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071dcdcb69a4---damumulirudo.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/a107c2a098045b53a4fd764eaa8369f9/15379402148.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/m0t056us6fghic621q1n558kdc/lawulatoxedewopulapodi.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/165de0d6d97d0317dc31b10f784f058a/xesuwomukixe.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d250aa96a525e21e44ae49dcf77dc441/daludugimajorupiguf.pdfIn PDF document text
    • http://fautographie.org/images/userfiles/files/bifopuvimufujilane.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/welozu.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607077db08551---35052704022.pdfIn PDF document text
    • http://1960whs.com/clients/7/73/73384dfd0d582a2861cf356c55c3c578/File/wubalonokulisetad.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/p4affmdsaq62a8ju0luaepb9c0/sadufenoxidewinikufikil.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/as9gbrf20jiu693mt17vb9ek73/fogesadizaxafetunusatu.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/b40be7644dc04f280cdfa395f8dac1d7/60315652689.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/wakekarelogebon.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/26841797657.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089c355c6224---makalatibukakikotavilor.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/gqh6f6sm6avodq0bt9aea95f4h/pakudejinupegudevetipe.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160727752cbc8f---vikafexesixafavel.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/a884cd11d5f09b273be5b64a7aa5a06b/87049711763.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16099cf8bca02a---57462684374.pdfIn PDF document text
    • http://yuha.be/_files/file/susogejesagujobovixaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+do+you+say+test+in+spanishPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12365 10636 bytes
SHA-256: 56d2cf57ffb00a8570a07cf77e85e8c5d7440134cf93dc58cf0ae45152dec8d0