Malicious PDF — malware analysis report

Static analysis result for SHA-256 32e67b5920b5632b…

MALICIOUS

PDF

73.8 KB Created: 2021-09-06 11:06:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b762460cbf954be9bee91827bdf98cdc SHA-1: 352237c953cbf99ce19cb9c7c8ae6a8a80841f93 SHA-256: 32e67b5920b5632b24ff2f6b4e219af2c8cee83732966231d13b995a780a579b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links pointing to compromised websites and disposable hosting, characteristic of a link farm used to distribute malware or conduct phishing. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the link farm suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bb0c6418616---romegavakolakapimusotip.pdf In PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/2674dabdef06a58bfffd3845a9c4d7a7/dugivekotijigepotaxurit.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/85858425648.pdfIn PDF document text
    • http://x-site.by/upload/editor/files/kewadotozoxo.pdfIn PDF document text
    • http://remobudostol.pl/pliki/85898367194.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160bba5d87ec65---gutefubibedunolotomog.pdfIn PDF document text
    • https://catwalkdogcome.com/editor_upload_image/file/39664024509.pdfIn PDF document text
    • http://galeriejacqueselbaz.com/userfiles/file/xikadedaporarowefunan.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160878123118cb---66351225835.pdfIn PDF document text
    • https://truckforceone.com/upload/editor/file/7781569434.pdfIn PDF document text
    • https://www.hotelrestaurantmacarena.fr/ckfinder/userfiles/files/desidunokujiwamatep.pdfIn PDF document text
    • http://kxnjl.com/userfiles/files/66080763950.pdfIn PDF document text
    • https://kga-am-adlergestell-ev.de/kga/ckfinder/userfiles/files/16473914027.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160967abe9cc0a---manojosixemijori.pdfIn PDF document text
    • https://puppometalli.eu/file/68869419573.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/3ecbbd111681fc9ad6f86b87a07a2196/53896095.pdfIn PDF document text
    • http://xn----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/zivuwibemapefowakosabif.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160986b412926e---bagesupifupumaxobikolape.pdfIn PDF document text
    • http://hiredriver.com/uploads/assets/files/29760543938.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d90ab0c124---lotup.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/a6v7j34kl3vn0qbt4btqkms4jl/pinin.pdfIn PDF document text
    • http://naviway.su/upload/files/xivafewigekoko.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/dewivilamuxotutobebo.pdfIn PDF document text
    • http://cec-intl.ru/app/webroot/files/file/tekunamov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=corresponding+parts+of+similar+triangles+worksheetPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/55ff39a4dfa7b0bf2b8c69a1e6ae2400/40825483502.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_off0000be66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE66 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d67d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD67D 11156 bytes
SHA-256: db4315adb5cb5462d475394005bd1aeb0a4ddc3d7fb1a6925e85b3a779b563ee
font_02_sfnt_off0000f03c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03C 15280 bytes
SHA-256: b4c9285a3bdb6c46535f1d714c5e6c67788e4fc2a89ce044ea2b3dbe0e79e8c3