Malicious PDF — malware analysis report

Static analysis result for SHA-256 058a7fca62ebaf8e…

MALICIOUS

PDF

70.3 KB Created: 2021-07-19 09:55:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5fd53dd0d812588429752773617f489f SHA-1: 78be7e3cd3550438000907533f5be0799ef6f191 SHA-256: 058a7fca62ebaf8ecc88bbb01c74373af6ff47d983f5d44b0902886d9e60deaf
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. It also features a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to obscure the final malicious destination. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification, likely involving phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5877

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/4516e95be794f01a097a65ddc562250e/11903279236.pdf In PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3f797c9ec---43346088318.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/97f0e78e8b9e4ed53d78615c91a09058/zufuw.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c98db5e38fd---68695052028.pdfIn PDF document text
    • http://gk-eventus.ru/admin/ckfinder/userfiles/files/jerigagota.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c3dc7de8b00---puvoforenekadegadupufag.pdfIn PDF document text
    • http://dd-eng.com/files/files/lesefunasam.pdfIn PDF document text
    • http://nicolalazzarotto.com/userfiles/files/14626227120.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16095a1f876ba7---kujubugajutaxozitado.pdfIn PDF document text
    • http://ahchala.com/img/file/81602487470.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090b4c4b3ed2---nezoj.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085812ff2bf0---nasevivusedufije.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/58a8fa049b0a72c2137136f39f2866f5/biwapagelivanizelotot.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aac4a4bd2da---35176463511.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4152386344---pumupulajepadojebuxunesuk.pdfIn PDF document text
    • http://waukeganeast1980.com/clients/877304/File/20853378983.pdfIn PDF document text
    • http://rybarict.cz/webpagebuilder/ckfinder/userfiles/files/fekunumosig.pdfIn PDF document text
    • http://mnogonomerov.ru/uploads/file/zikosikibumufotejog.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/32671451478.pdfIn PDF document text
    • http://farmaciafasolis.eu/userfiles/files/jafutuvodukikimuwedek.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/4e071317c4d13dfaa3d8b34e78ba5ec4/31003234681.pdfIn PDF document text
    • https://soyana.de/js/ckfinder/userfiles/files/jorekigozusekekono.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609697fbd5b14---gakewinimolazekikoboj.pdfIn PDF document text
    • https://viratrip.com/basefile/travelasreviracom/files/xuvenovag.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3f6c3a13b---sanukavobatodumixeweg.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/05b98fffdecb581589a0dcdbcf0507cc/dadegedozupuxu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=how+to+quickly+increase+your+snap+scorePDF link annotation
    • 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_off0000f306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF306 17240 bytes
SHA-256: 790610c1e01909265b0778c343f42671a913c510eb018862c5a8f626044aa376