Malicious PDF — malware analysis report

Static analysis result for SHA-256 0da57bb27b51183d…

MALICIOUS

PDF

81.4 KB Created: 2021-09-01 10:26:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f29aebbe840f5e3b30ab586895164a80 SHA-1: 44b5c0ac7ee0f44a879e1659bb14d66c5683de98 SHA-256: 0da57bb27b51183dee475156b9a6d644b9c30ddae960e65aab2143773fbd3218
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 uploads and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The file's structure and embedded links align with common tactics for distributing malicious content via seemingly innocuous documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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.
  • 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://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/715b24298a2792f78540255ac7d5daa8/taxifekokefanaletepu.pdf In PDF document text
    • https://mosconi.net/userfiles/file/28678959171.pdfIn PDF document text
    • https://linhquan-group.com/upload/ck/files/sujitirejikivami.pdfIn PDF document text
    • https://hantverkarenisandby.se/UserFiles/files/92932593414.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b31a3d8c9f0---50959057977.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/e497fb8fc47d2fd87e329d6ddab36119/zimesowejogetowide.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce44538965---40693078374.pdfIn PDF document text
    • http://tandartsindex.nl/images/uploads/95205093355.pdfIn PDF document text
    • http://ajisushionline.com/uploads/files/61666835919.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093c0329838f---xevezuwiwexo.pdfIn PDF document text
    • https://motodubai.com/uploaded_images/files/baxeporevalalasavodi.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/munodagu.pdfIn PDF document text
    • https://ijtm.in/userfiles/file/jekexetajipigubuzeponazi.pdfIn PDF document text
    • http://ristoranteibucanieri.it/userfiles/files/11391403463.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/e815a8f6d837f3a717634f3337fbaf24/xivobemewojabuxalusona.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/agitlr06uke1i5gnkpr6n8vmt4/zuxibobufikorejewadoj.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/23884662625.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/4g62odf23q507c4jr1hjqa1gs6/titojubimajejuri.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/52ql6t5l87al0nnmuuctbcc2j1/69748738808.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16086fbfe989b5---57636393738.pdfIn PDF document text
    • http://polesprogettazioni.com/userfiles/files/49006890608.pdfIn PDF document text
    • https://wagaskar.com/media/bebuzip.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609dcaf7a7cb3---10123929544.pdfIn PDF document text
    • https://manenshop.com/upload/files/gezul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=how+do+you+answer+what+are+your+weaknessesPDF 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_off0000d8ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8AE 10592 bytes
SHA-256: 872ddf19bfa38e2721db88e45fa59d8ed1b3e9fdd65173242a4525754707d86c
font_01_sfnt_off0000f0df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DF 18044 bytes
SHA-256: b02fae1f3a1fac86e92f8abfaa185a38d0dcd4373d3eb0d8e9945a2280e9ec6c
font_02_sfnt_off00011fec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FEC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1