Malicious PDF — malware analysis report

Static analysis result for SHA-256 54ac3c9068a4981d…

MALICIOUS

PDF

72.0 KB Created: 2021-08-23 17:33:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d29f983ee9e208c89acc8c1c290bf654 SHA-1: a6a5d589ba8754215c3c1d32be7ea6f4b5a9e704 SHA-256: 54ac3c9068a4981d17c6af84f1e2134a2d307cb7b97a1540fb9c0044b915422c
162 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 WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or initiating malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9033

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://animationcoach.com/userfiles/file/18307529050.pdf In PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/40a5fb6bc8189b064d0cae1687b00f3d/xuvajumo.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4fe38a5767---wetomixuxirujezaz.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9430c88cb8---76381261078.pdfIn PDF document text
    • https://alibabaoman.com/basefile/alibabaomancom/files/rogeru.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/7980025005.pdfIn PDF document text
    • https://toptenstudy.com/upload/files/BodyFile__60ECE864408B6.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/4facbbcfac0456dd95998fa353beb37c/13301327976.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/op9ahim85h4hcd1fmi2jl41h24/86079987980.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160e1079590660---xumupovoruvobeziniwalorav.pdfIn PDF document text
    • http://health-bridge.in/upload/file/10540771759.pdfIn PDF document text
    • http://centreforeffectivecoaching.com/media/file/nezitudeponoje.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/suh7olp0167mcijodc00s382dc/39560535389.pdfIn PDF document text
    • http://gapp.fr/medias/files/75721709898.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/2ca188a18c5872f7e8663bd7f6efb59e/kebizotegiledavasewox.pdfIn PDF document text
    • https://educhina.mn/editor/files/wuziwuxunosokozog.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/rakufapem.pdfIn PDF document text
    • https://manualismedicina.hu/fileok/file/subakomemupelimeneram.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100220299360---sevalavuruvubumowiku.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/4757bmtg36o7q3pmqeu5d9ogv5/9158452327.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/midakesodemoselav.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/464edb00ln8if5nm0v115caprb/xorigone.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160ae3230b884b---69100581683.pdfIn PDF document text
    • http://autofactory-jin.com/js/upload/files/41388148026.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/n775pedv7medtjgoci40m457n9/vipusibadakaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=on+the+road+pdf+downloadPDF 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_off0000eec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC9 10444 bytes
SHA-256: 8313debd7ff0a8faf9ff6f306de0ab2c8bd63c0cac1bb29c855a7b9ee62244cc
font_01_sfnt_off0001067e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1067E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1