Malicious PDF — malware analysis report

Static analysis result for SHA-256 572fbd353d021ae8…

MALICIOUS

PDF

78.3 KB Created: 2021-09-08 01:31:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: beebf57c107ffb32dc0164f4ccb784fa SHA-1: e6efa74da456dc837b1261b1fae6071dd8de2863 SHA-256: 572fbd353d021ae8aa9557bbaa6c1cc9c765f81321c196f66bf8aa214c45f61e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous embedded URLs that point to compromised CMS upload directories and disposable hosting. These links likely lead to phishing pages or further malware downloads, indicating a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a79007aef4d---72346933998.pdf In PDF document text
    • http://arenda-v-novosibirske.ru/ckfinder/userfiles/files/vakeparezelunitapan.pdfIn PDF document text
    • https://inprovitcaribe.com/ckfinder/userfiles/files/39046528339.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610837ae27fef---wedov.pdfIn PDF document text
    • http://hydrem.ru/images/file/16579147487.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/75c04680d1bf245e3cf6c13e4d39e557/sisujoridojelivalapus.pdfIn PDF document text
    • https://alternatifhosting.com/calisma2/files/uploads/36793054785.pdfIn PDF document text
    • https://all-stage-meditation.tw/uploads/files/611681cfba0c8.pdfIn PDF document text
    • http://vina2002.com/uploads/files/59508271062.pdfIn PDF document text
    • http://nfraccon.org/userfiles/file/21500943506.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f203ce3a16---vetexabew.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1608c492057f0f---47430887070.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608daff66cf96---buzagokilufal.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/borupo.pdfIn PDF document text
    • http://rideco.hu/upload/file/zofupoxevuwofirepulupoxar.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/ff7c2a1265039b9a30db7b2066922d58/jevejopaxidojubutonesafo.pdfIn PDF document text
    • http://soundspace.eu/Upload/file/4909860072.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/81216888956.pdfIn PDF document text
    • https://wasael.com/userfiles/file/fazemulamedewajovibeb.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c8eae26747---14567249600.pdfIn PDF document text
    • http://icwest78.com/clients/67591/File/73818234556.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3285873db---wixulasevagi.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/p2egf4o3rt1dm3kn71mobp735s/fopivetipupimor.pdfIn PDF document text
    • https://suma.ca/upload/editor/file/xogirigijotugipukon.pdfIn PDF document text
    • http://baaningdoi.com/file_media/file_image/file/fewilu.pdfIn PDF document text
    • https://tsolisp.com/files/file/naduzinumexovutaxubexizof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=geladeira+brastemp+gourmand+brx50+manualPDF 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_off0000cad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAD5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e2ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EC 11372 bytes
SHA-256: 3cb6c098d896b4bd05f104091112262de752d11dac4ced9a743cf1eab79a9779
font_02_sfnt_off0000fd47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD47 17548 bytes
SHA-256: 64d59909232dfdcdb13fa245682503d3f55708d0cef74782e6e02dce2acf3839

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