Malicious PDF — malware analysis report

Static analysis result for SHA-256 48e21196660a3142…

MALICIOUS

PDF

77.7 KB Created: 2021-09-19 18:57:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e34aa70abd55a1663300f32dffd2a38c SHA-1: 6cac13b361eab626662006db1e89fdee99b5b653 SHA-256: 48e21196660a3142cbdbe8a4b0fa00d4dc60f888772df825a0b6a4fa34492173
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS upload storage or are part of a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely responsible for redirecting users to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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
  • 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://crysiq.ru/uplcv?utm_term=dr+strange+movie+watch+online PDF link annotation
    • http://clinicaveterinariasangiacomo.it/userfiles/files/jafapef.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/4619f7649d1db33e4fb4c263729c0153/7955922239.pdfIn PDF document text
    • http://interreg-ipa-husrb.com/downloads/7349738583.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613c7dfc9facc---legolijevofipas.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146a926358c2---jagidiriminotejajapaz.pdfIn PDF document text
    • http://criollo-cocoa.com/userfiles/file/bufemavisesiguwo.pdfIn PDF document text
    • https://natanashoes.com/kingkong/userfiles/files/kijofokenabogesililodaku.pdfIn PDF document text
    • http://chengzechem.com/upload/files/gefegemipetema.pdfIn PDF document text
    • http://csa.china-led.net/static/editor/ckeditor/ckfinder/upfile/files/61683184132.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1612f5802ea8ad---naxeled.pdfIn PDF document text
    • http://karthikeyanjayaram.in/userfiles/file/nubefawikuwikazisaxatewo.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161408f342737b---85255175264.pdfIn PDF document text
    • http://regalmotors-jp.com/js/upload/files/17558658416.pdfIn PDF document text
    • http://originalavto.ru/userfiles/file/xasesinelujemufumavi.pdfIn PDF document text
    • https://sagarexpress.com/userfiles/file/32962489321.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/159fa40a0239ed110c1758bd5a8a5b32/dirideselipureviso.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/161339e1160654---pogofiweg.pdfIn PDF document text
    • https://hainutedecopii.eu/ckfinder/userfiles/files/67067046453.pdfIn PDF document text
    • https://corpeverest.com/ckfinder/userfiles/files/gulododo.pdfIn PDF document text
    • http://getvisa.ru/images/File/86471687192.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/clb9qvc99u7f9868m48ngdr8hr/vojalapumatefulerasadex.pdfIn PDF document text
    • http://klubalfa.org/img/userfiles/file/24280533780.pdfIn PDF document text
    • http://archiwum.wyryki.eu/admin/ckfinder/userfiles/files/rafaxo.pdfIn PDF document text
    • http://bernendorf.ru/userfiles/file/27842049059.pdfIn PDF document text
    • http://assytekservizi.com/userfiles/files/bozutalenasa.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_off0000ca93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA93 17464 bytes
SHA-256: a1f8c5869ba6f825a4994d398d82c503489e5384c2a8fcaf778c56a6f3868ad3
font_01_sfnt_off0000f7bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BD 10832 bytes
SHA-256: 90807f40c69ba58976de9491f2bdd283bc69d1e38e3c376c69e059c646a4cdfa
font_02_sfnt_off00011098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11098 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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