Malicious PDF — malware analysis report

Static analysis result for SHA-256 60048d12f2df6d42…

MALICIOUS

PDF

82.7 KB Created: 2021-07-02 19:58:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b90eb8a30170da0aade5bc787366fb05 SHA-1: 15c853c07b1aabb63d4c9d6e631b16569e2d91f2 SHA-256: 60048d12f2df6d42a88d7ad6d1304e1a7068ad4198aba7c85077c00d7bd77df7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by multiple heuristics as a link farm pointing to compromised CMS uploads and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV also strongly indicated maliciousness. While no scripts were explicitly extracted, the nature of the links suggests the document is designed to redirect users to malicious sites, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9931

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://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609de434b91ac---xonatunudusob.pdf In PDF document text
    • https://plentis.eu/ckfinder/userfiles/files/99937234381.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/bvm57jlpn023o58hfj9p51iot2/62033945581.pdfIn PDF document text
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/c43d64b1d291ddc879b7b96d7dcfea04/badugivevujusomupare.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160907cdc9be87---55218751595.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd22dc94ed---zagopuselerunutoj.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/e31fe07c4036c123b1d3ac455bd4762c/85893587937.pdfIn PDF document text
    • http://mulroyenvironmental.ie/userfiles/file/77293239522.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/e34d497680002c58f0a9c8948bf734e2/nopurosopivaku.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/396f86b2315dc1c1241a84c745581097/paxevinaponeputunameke.pdfIn PDF document text
    • http://blessingsngo.in/userfiles/files/dozudozataronulamafowo.pdfIn PDF document text
    • https://kuepancong.com/contents//files/35025001170.pdfIn PDF document text
    • https://cncunse.com/d/files/satawekusove.pdfIn PDF document text
    • https://soechi.net/userfiles/file/pebigetuxafuref.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a81b0967e5c---95214430294.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/160726b7d1ab88---30954381205.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/131a1fbbfe08f03c736f02268a857ee7/gepanugipamibadosero.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/42858956702.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/2tfqe5hvleu4fofgilplf0ttm7/fugituzeregogemetumijuz.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/fdec2f94af2845f54474c5498dce82de/xidale.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/1e22212c91e2ee0d329b5de3cb919ca8/goparomozarupiworaze.pdfIn PDF document text
    • http://creative-format.com/upload/editor/files/dogagugav.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076175e17072---19486488998.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=meaning+of+rechristenedPDF 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_off0000c8f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE102 16652 bytes
SHA-256: 24d001c4fd57a2e91fd8727650014b0f6676423f1c8b23756aebe4a041d14715
font_02_sfnt_off0000f841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF841 17072 bytes
SHA-256: 4cdbffef76d9a6a3fc7169746653454886e7319d92e41d7a0b277ff9fca2b7ad
font_03_sfnt_off000124e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124E2 10704 bytes
SHA-256: d073708fb1d9f4f2fb88dc7434790a4f5fb5066c4ff39979904e93b16010dbfe

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