Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bfe6490fdaf1fca…

MALICIOUS

PDF

85.9 KB Created: 2021-08-02 03:17:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: fc73e4ab2ee7d65a307210741949ccd6 SHA-1: 2764fa16bfc1e44831244452207f3e4544b18015 SHA-256: 6bfe6490fdaf1fca825dc30606aa7b3ca56fdfcd541b37bd18ae21b00aae97c0
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to distribute malicious content or phish for information. The embedded URLs and the nature of the heuristics indicate a strong likelihood of this document being used as a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • 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
  • 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://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609c4214c7f52---91937326730.pdf In PDF document text
    • https://blsautomation.com/ckfinder/userfiles/files/sasiladedanofitodu.pdfIn PDF document text
    • http://gift-founder.com/archive/upload/files/ledadudevedez.pdfIn PDF document text
    • http://gewoongroen.eu/app/webroot/files/userfiles/files/vatuxa.pdfIn PDF document text
    • https://kovtec.pl/eurostyl/photos/file/75861078282.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/af5c899318453be33598e2b9d456a070/pelubuwebozakujep.pdfIn PDF document text
    • http://kashima.cc/userfiles/file/jegek.pdfIn PDF document text
    • https://ctapigroup3.com/contents//files/poxepirisugamegiroviz.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9b80849ca---80202834470.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d0a935cc2---62749990356.pdfIn PDF document text
    • http://smartdeal.pl/files/upload/files/75136998738.pdfIn PDF document text
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/dbaqfqohoess179d9kda7qdtp6/1802849677.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/14e2c9220bec58113d0e4f4ea48dc4ab/47307489556.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bf37529516f---94464275307.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a95c0087ce8---85617312594.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/jtkho8a59fmoj8a422n5ui4e6m/mupitagiluxeri.pdfIn PDF document text
    • http://digitalpolicycouncil.com/imagenes/file/fotedulijufivufojofepe.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/e1ef8b377d5d1d525fd50bf4397ffc89/66433554862.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160b61338f20de---vijudutosenej.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c07783f8c---befero.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/t8d3846p002kuk08bo7hi4ms8v/82558882345.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/jb7f831va8i55k0m02pr5khgfi/7626459519.pdfIn PDF document text
    • http://mizuho-co.net/file/ck/files/69543743081.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=corporate+finance+institute+basic+excel+formulasPDF 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_off0000e6d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D0 11012 bytes
SHA-256: b06dedbab295b4f8a68200cd53c284bcf213f08f7279bd24e52b2cec5b964397
font_01_sfnt_off00010038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10038 18536 bytes
SHA-256: b9ca7a8ad852ffa844540f9ab8056ce16070be79c20891925d4cde67ef9480f5
font_02_sfnt_off00013197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13197 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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