Malicious PDF — malware analysis report

Static analysis result for SHA-256 22ec3574612a8079…

MALICIOUS

PDF

75.3 KB Created: 2021-09-03 06:30:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 46ed6fa5edccab95c8b3c7d30d31252b SHA-1: 39e6970ae1dd6ff3bbec6a40f04e7750ce16405c SHA-256: 22ec3574612a8079271b8bac76de607e7fbfd91a352d60381d404d1de4c435f9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the nature of the URLs indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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://infrive.ru/uplcv?utm_term=konsep+kelompok+sosial+pdf PDF link annotation
    • https://asharfilalkulfi.com/ckfinder/userfiles/files/didipavevew.pdfIn PDF document text
    • http://jinyezi.cn/upload/39467126914.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/ee42dc4c1662152335c76c830470643d/tinugozalelodutadojow.pdfIn PDF document text
    • http://studiosiriosrl.it/userfiles/files/saniwepinava.pdfIn PDF document text
    • http://m3hotels.com/userfiles/file/23265487858.pdfIn PDF document text
    • http://taiwan-casters.com/userfiles/file/56743963011.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/8d48d3feb81e80a633641086bdaadd6e/varasexatalo.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/7cedf46d22defd5c207d03f5479e4efa/43079512656.pdfIn PDF document text
    • https://opuntia.eu/wp-content/plugins/super-forms/uploads/php/files/19bc02e81214c3a0b66b66ba41c793e3/63324609212.pdfIn PDF document text
    • http://gidaero.com/upload/fckeditor/file/98939390093.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610baf916facc---46077652612.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/16085e39f90821---51378649467.pdfIn PDF document text
    • http://assistance.uz/images/shared/file/noradalogukaso.pdfIn PDF document text
    • http://gospelinamerica.com/clients/874377/File/25737527630.pdfIn PDF document text
    • http://fitviewer.biz/files/file/29732180722.pdfIn PDF document text
    • http://mytmbc.org/fckimage/file/semejeneked.pdfIn PDF document text
    • http://mynigaoe.com/upload/file/20210820223009.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/rufuvuwulapafupamuded.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612de8c567e86---44499645352.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/41af968a5117a16d050aaad4566f1f93/17763518674.pdfIn PDF document text
    • http://fluitec.fr/ressource/site-image/files/69067988372.pdfIn PDF document text
    • http://skazka76.ru/pic/userfile/23277870256.pdfIn PDF document text
    • http://ledins.lv/cms/file/kulodinixumudatupux.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/c3f3db15613569a8d4dbcb186c87073c/19204503977.pdfIn PDF document text
    • http://pro-elec.ru/ckfinder/userfiles/files/xibadakirovu.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eadb85975d---10056317164.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/93422118137.pdfIn PDF document text
    • 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_off0000c761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC761 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000df78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF78 10544 bytes
SHA-256: f425d651e8ece1251a2c54e6f34ee537b40f4442955b4dee89fe2254921c6248
font_02_sfnt_off0000f768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF768 15648 bytes
SHA-256: 9693fe782a33eb3d8e9e4d8a7211adbe8862a4a6d88260c9072cb7cc19bc4a50

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