Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c1c2d73c6f522e6…

MALICIOUS

PDF

92.0 KB Created: 2021-06-28 21:34:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 98311614e44f57408b9a190b7780d728 SHA-1: 8d16473c594117948cbcfe487936cf35586759db SHA-256: 0c1c2d73c6f522e633a8bd5099aa67a835ed962408206b3c16ea9869a49a665b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a downloader or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aca09be7066---jusimuxomegu.pdf In PDF document text
    • http://agcslohian.com/userfiles/file/zozikinagukifug.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f71c17ee5b---duwekezizuxugedob.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/162e343dcdf0883cf426229481d05c3d/70432490382.pdfIn PDF document text
    • http://ellev.fr/upload/files/81897881063.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/jasibunexadabi.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/gafusilagupox.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160786209c6066---11975380991.pdfIn PDF document text
    • http://bukhatirhomes.com/userfiles/file/xagizufib.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c84cc18045e---40035937109.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/597ae1ca74dcc2b169201878d2967751/90818665345.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/ac259ec256888e3037544bce8640fd9d/vijokerovagakexikazudumuf.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609f52900effb---tituvizofajazunanirid.pdfIn PDF document text
    • https://parokisantolukas.org/Uploads/userfiles/files/sudepu.pdfIn PDF document text
    • http://caramelitos.sk/files/50005037317.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/5cpb9g0ekbm7u0aeeguukormsh/79254871098.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/s7cn5a8ot110f1ns20e4g5mdu3/52240889258.pdfIn PDF document text
    • https://onlinendttraining.net/files/xipadet.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1609cebe050ddc---57180997291.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/5b5d2rh0uskh2he9amj51cgtj6/9183883049.pdfIn PDF document text
    • http://stinpo.com/ckfinder/userfiles/files/xijagebekirosemabulezaz.pdfIn PDF document text
    • http://pdww.ru/ckfinder/userfiles/files/40173069177.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/romoroxekemas.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/55842bd0bb86f815afbd92814a561ab6/sunanerok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=how+to+turn+an+image+into+a+pdf+on+macPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED31 17072 bytes
SHA-256: cea4b03c017e17f29277740f08555b474597af0e167263fe9bdbd71db3b0d49d
font_01_sfnt_off00011984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11984 16680 bytes
SHA-256: 5341410cc9c1f0cddd6f4196dba0a3329cffd2d1a4a7c4941f4495b9a6e68250
font_02_sfnt_off000130e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000148f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148F9 10928 bytes
SHA-256: 108a9323cfeccd859bd368c2c1e6687e7e14f654a18006a562786bf29f470d3f

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