Malicious PDF — malware analysis report

Static analysis result for SHA-256 3481fc501dd4810c…

MALICIOUS

PDF

122.1 KB Created: 2021-07-27 22:55:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9fc655e0118b56bb94eef69e6e721a4f SHA-1: 34eb7107629e6d962096235752cab963697f058b SHA-256: 3481fc501dd4810c2f4d6d126d6cb62d0713f5f680e5caac3cee24fc30097062
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's part of a phishing or malicious redirection campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7682

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://weblative.com/wp-content/plugins/super-forms/uploads/php/files/mqqn66lkfgrstuh4hcv8u0heaj/89540972751.pdf In PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609157fe29523---pijosivamomexo.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/rusufobuzabebeluporob.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/59913592432.pdfIn PDF document text
    • http://31kouqiang.com/userfiles/file/1623758462.pdfIn PDF document text
    • http://ledseoul.com/userData/board/file/96437781440.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/8118e59153beac0a56a2a6a630b9cd70/10670952115.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/160911afd59d17---givosipoxanef.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac028f283c8---4661821116.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16085d2ee7677a---rakabavanaxafesuxuwebo.pdfIn PDF document text
    • http://euro-ex.com/41837126736.pdfIn PDF document text
    • http://thewellmanteam.com/userfiles/files/gupepenuk.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/7fce5d1d7b0c494c25e7152a4a520024/riviguxafopurawiz.pdfIn PDF document text
    • http://prttour.ca/FileData/ckfinder/files/20210705_8B6B27BA89159EEA.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/siwowaneximevevidaxazop.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c37010e0ace---wetozilomejitejaxesabu.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/862f61fc37a217bf2192747f72807537/jiwetijareb.pdfIn PDF document text
    • https://vetregistr.com/ckfinder/userfiles/files/35789416760.pdfIn PDF document text
    • https://kocarbon.vn/luutru/files/tomuzufiso.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/82370086557.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607e907c5ca44---31931985365.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=what+is+the+meaning+of+lalitha+sahasranamamPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e47993e7d2---23704315193.pdfIn PDF document text
    • 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_off0001ada6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ADA6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001c5b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C5B8 16476 bytes
SHA-256: e4816d09138cd5bdbc74593a758323f27bef260f0d1a8bc4788d61f968d9d931

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