Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ce2c6289b45f479…

MALICIOUS

PDF

84.0 KB Created: 2021-09-04 03:31:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4ba86f9d85c2b6bc7efc5af3951f6bef SHA-1: c3720bd8032620cfe7259d78226718202af090bd SHA-256: 5ce2c6289b45f479681b4afc6c902ad7c7c7bd241f583427979ef541aaae4ae5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of JavaScript suggests an attempt to execute code or redirect the user to malicious sites, likely as part of a phishing or malware delivery scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8669

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1c5090107ffbcecf79e88edfc635ea36/82557708557.pdf In PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608e83bce8761---43719832737.pdfIn PDF document text
    • http://billagelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sixuromedijokatep.pdfIn PDF document text
    • http://jimmartinfamilyreunion.com/clients/35696/File/gowagiwe.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9a41d7e38---fiwoj.pdfIn PDF document text
    • http://nickels.design/ckfinder/userfiles/files/11282472896.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/b90e39bdc984ce1e8f89d7ab0c722117/58450989091.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/90dbb024bea691c2d51a99741d7e5dc6/xuxuxagugejoxoxup.pdfIn PDF document text
    • https://erdenetpost.mn/userfiles/files/80141832866.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a7629708d24---wugej.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/6kq57uq8mjcqso4td4vcbnd0c5/fekugurar.pdfIn PDF document text
    • http://rotarytattoomachine.co/project-new/christianbook/upload_images/file/26785318309.pdfIn PDF document text
    • https://mmszke.hu/files/file/lapufikavafa.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9025448c93---zasirumev.pdfIn PDF document text
    • http://daiichilogistics.com/uploads/news_file/popibojaxunixepidul.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608339943cc30---88985308501.pdfIn PDF document text
    • http://bielwod.com/userfiles/file/sufabuwumesuzuvilamek.pdfIn PDF document text
    • http://parmalab.it/userfiles/files/925786014.pdfIn PDF document text
    • http://caffepontoni.com/uploads/file/bikuloromonumaj.pdfIn PDF document text
    • http://esebtekstil.com/resimler/files/garisufobiz.pdfIn PDF document text
    • http://blow-w124.com/js/upload/files/xudosexi.pdfIn PDF document text
    • https://cairparavel.ro/app/webroot/files/userfiles/files/34172044217.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/fuwimipureli.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/161150a30bd95a---77871150461.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=shaws+gynecology+pdfPDF link annotation
    • 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_off0000ef00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF00 18336 bytes
SHA-256: dad17b6a887fbd6653eb9c5e0b4bd4243d7363fabdb206de7052dfeac49cf87a
font_01_sfnt_off00011ecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ECD 10884 bytes
SHA-256: 276933d9b34a8efa68cb5d9ef0a88255c29548d5c3ff25e06e2993769fa789a0
font_02_sfnt_off000137c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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