Malicious PDF — malware analysis report

Static analysis result for SHA-256 e697fa9db75eb561…

MALICIOUS

PDF

79.1 KB Created: 2021-09-19 21:29:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8b810aaffae3205016ad6fc8c0674524 SHA-1: aee5038ab03f2458c30e14f6d6e6e7c5de22e59d SHA-256: e697fa9db75eb561cdcedc29f0369e28cba25827bdfb1069389a0174aae22eb8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161301a849bd25---53429669681.pdf In PDF document text
    • https://tnmkor.com/FileData/ckfinder/files/20210914_09D12CB002B0AAFA.pdfIn PDF document text
    • https://serviceelectric.ca/userfiles/file/losopedavonimelisiko.pdfIn PDF document text
    • https://tselectromechanical.com/uploads/CKfiles/files/xafadudekuworerekol.pdfIn PDF document text
    • http://www.malagatour.es/ckfinder/userfiles/files/zulaxezaweboninefubapu.pdfIn PDF document text
    • http://kondicionery-elektrostal.ru/upload_picture/file/dizir.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135c1bef34ac---sariwezipepopizi.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/82999933447.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/161404db5bb739---9640190742.pdfIn PDF document text
    • https://vr-spagna-20.effievirtual.com/galeria/files/givejuset.pdfIn PDF document text
    • https://myclubowners.com/userfiles/files/mameneb.pdfIn PDF document text
    • https://mimpishio1.com/contents/files/35920504415.pdfIn PDF document text
    • http://ilkjv.com/Images/Media/files/lefala.pdfIn PDF document text
    • http://ulv-fogger.ru/d/files/rumodaxafanego.pdfIn PDF document text
    • https://acrgruppe.de/userfiles/file/namivik.pdfIn PDF document text
    • http://szyqjsj.com/UploadFile/file/20210916131239792.pdfIn PDF document text
    • http://xinghui.co/upload/ckimg/files/202109091124097761.pdfIn PDF document text
    • http://shengyaweb.com/uploadfile/file/2021091402445910.pdfIn PDF document text
    • https://chogmai.org/ckfinder/userfiles/files/nasuwojojexedapajujofim.pdfIn PDF document text
    • https://razredna-nastava.net/files/zakuxobajapitapuv.pdfIn PDF document text
    • http://xinyuemu.net/assets/202109/files/20210911061239734618.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/97f86ed264d4ec88c4c0ec15dd1a9bf2/bezalixibetavanuje.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/6sukeicvpi6aefep49fbm2fp7j/fudixizamudaxugesiwo.pdfIn PDF document text
    • http://ever-pioneer.com/upload/files/gadivipilesaxonejebojix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=talking+tom+angela+hackPDF 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_off0000cf21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF21 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE733 18740 bytes
SHA-256: 560018eb1e4d135995621af9029026324d554a9d881adaafdec3972348018cfd
font_02_sfnt_off00011779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11779 10464 bytes
SHA-256: 1431f7d626b6abb70dcbc727abe571829d6eab20a90949f6522c41f322cca0ad

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