Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d9ac8dbc1bf4edd…

MALICIOUS

PDF

71.6 KB Created: 2021-09-02 12:06:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 673e0f782ab2dc791d53cd792669d76b SHA-1: 30138f9e0bcb51556d8e1d304ea9e5eed383bb6b SHA-256: 0d9ac8dbc1bf4edd17853a99f14692524fb1c7a6e4b86feb8ba75e05e534568b
154 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, which identified it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting domains. These links are likely intended to lure users into downloading further malicious content or visiting phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6717

Heuristics 5

  • 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
  • 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.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/ab5745bd4df5bdb3f23e3e51bbc68d3d/kiwon.pdf In PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8cbce481c7---fapatamovadudebijevibej.pdfIn PDF document text
    • http://chronocertif.com/userfiles/file/dabojenaremix.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/pipaneko.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/65277511849.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/kefirow.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610d5f240580e---35437503475.pdfIn PDF document text
    • https://mytopics.it/uploads/file/melozuvedugepowixizepabop.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3f0cfb9f59---zanusojexisapeku.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/122ec6eacbaea38f0e7287da5f49c5e0/diguga.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/38bd76c3a454b88da0b986bf7338bc81/rizebuxoluvinamenufigur.pdfIn PDF document text
    • http://g-shocktou.com/user_file/file/55259545511.pdfIn PDF document text
    • http://dansecyr.ca/pdf/file/fimidepoj.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/ff071e3c84d2247c9c232770a7b597ad/1156067323.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16070fda261296---59971551989.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/8b9edd2ac0f45bf9d01ea78f18816738/rofid.pdfIn PDF document text
    • https://ymvii.com/admin/upload/files/5719659192.pdfIn PDF document text
    • http://traktorpulling.de/ablage/userfiles/files/zamilofopuzed.pdfIn PDF document text
    • http://jghsclass75.com/clients/f/f3/f322050927ea28328664fd088939ffaa/File/71682794889.pdfIn PDF document text
    • http://designbeginnings.com/upload/file/xakawabixujumenise.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/10f40d4f1356770ddd6d25473331a13c/89021644361.pdfIn PDF document text
    • https://pieseautocomenzi.ro/userfiles/file/35381677618.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c46c8cb39---17225655678.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/54060491874.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=inventors+and+their+inventions+pdf+downloadPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10160 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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