Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c30180356b196a3…

MALICIOUS

PDF

90.1 KB Created: 2021-09-06 18:22:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2e0213d747d64eaad4c7f6ca7407458c SHA-1: b5fa921efb0d4f2456c483a4361465bb6652413a SHA-256: 7c30180356b196a323ad8dd6b1603a46108ad295dcf62dd8aa31bbd0b5bed2f8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs pointing to various websites, many of which are hosted on compromised CMS platforms or disposable domains. These links are likely intended to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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.
  • 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://kristaldicarlo.com/userfiles/file/40319981788.pdf In PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1610a841e36d7c---21989831145.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/88c2ef356468cf11d28549847bb4f60a/27876761314.pdfIn PDF document text
    • http://cartopack.com/Images/file/rewiximim.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/0de1e33462546962e9bfbc15d550cfca/19433889604.pdfIn PDF document text
    • http://zoncmswebsitebeheer.nl/files/editor/file/94814911827.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/a8fe22bcc859d861b7e64fa14c1b2886/gafoxip.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945814b0848---sixalam.pdfIn PDF document text
    • http://fittbikese.hu/files/file/gafedarerojog.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/fufukuziruzegibugabig.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/ec9dd7014ce83bda8c3504a9dfc7981d/zesal.pdfIn PDF document text
    • https://kvizek.hu/ckfinder/userfiles/files/kifekevisen.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608726947f0c8---rawapekikonakidemefon.pdfIn PDF document text
    • http://hybsch.it/upload/file/juwiwamewug.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160986bc8c47ff---75467932597.pdfIn PDF document text
    • https://rsun.pro/admin/ckfinder/userfiles/files/42732908432.pdfIn PDF document text
    • http://dorisemitchell.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/84308773432.pdfIn PDF document text
    • http://sciattella.net/images/file/85597772625.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160b03eb5671a9---xafigakutoveto.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/a1abb80e2b330cee3d3fa8d2e3880155/fovasilesuzab.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/t5gjuk5ql0imjmju6lgan6naf6/jawad.pdfIn PDF document text
    • http://geombiagioschettino.eu/userfiles/files/zurefulukanelamojabuveret.pdfIn PDF document text
    • http://bunny888.com/ckfinder/userfiles/files/subaxaboliv.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/370ae2b226726948a9d879c92903ab84/jubudatop.pdfIn PDF document text
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/6cvso03kdi33llpb8qm71upi92/punodifemixitodowam.pdfIn PDF document text
    • http://allivecoat.com/userData/board/file/megiburubozowo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=how+to+reduce+pdf+file+size+adobe+reader+xPDF link annotation
    • 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_off0000f98a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98A 18252 bytes
SHA-256: 1615c840ac32ad1897fca6cfbd39033e5fa87b356605dbf492ff57a983845129
font_01_sfnt_off000128a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000140b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140B8 10988 bytes
SHA-256: 3a85a31ff29538cfbb809577538d4f3ece4a95e5ad5195e1176b55b95e7667c3

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