Malicious PDF — malware analysis report

Static analysis result for SHA-256 47b6191ff78c86f6…

MALICIOUS

PDF

85.9 KB Created: 2021-08-03 04:51:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a4dc2ecd9ac59b33c7c727f6ae953589 SHA-1: 3670485ef7471a92f14d587a7c25ece2aeaa9b85 SHA-256: 47b6191ff78c86f64f9c52e734185da6ebb4e5c710191f5bf6d99871228f77d2
154 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. It contains numerous links to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the PDF structure point towards an attempt to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5921

Heuristics 5

  • 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
  • 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://huntic.ru/uplcv?utm_term=aifd+guide+to+floral+design+pdf PDF link annotation
    • http://wpscrm.in/uploaded_files/userfiles/files/gerodutojevini.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/f43fo93f2o8o8o274lbbrkpjg2/62439316387.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/10699e2a17aa85781595371fde3add0f/52901471888.pdfIn PDF document text
    • http://namlongprojects.com/images/uploads/files/31220651066.pdfIn PDF document text
    • http://hotelbelleepoque.bg/userfiles/file/givigano.pdfIn PDF document text
    • http://keacg.com/upload/files/jexixotokejudidigotutomel.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/i1lgrli4ql380skmrnu7e55jk6/batuvipawawegibumi.pdfIn PDF document text
    • http://519pf.com/userfiles/files/mikepugumapat.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608046f786309---21919801838.pdfIn PDF document text
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/2uhttqsmc8igpg10h9v9ug3t3f/dapakizosunakafem.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdebadb73f---fuzetapawar.pdfIn PDF document text
    • http://urbanposthotel.com/admin/ckfinder/userfiles/files/18582717938.pdfIn PDF document text
    • http://xn--49s538bo8ux8c.net/userfiles/file/bulojozozolajijifiw.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/b6218e080a32d0ea95746d6d78636302/23916636368.pdfIn PDF document text
    • https://tappowine.com/file/wisolamaxuxoligeze.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/xejubujemilozezuxim.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-6-11/20210611053744228508.pdfIn PDF document text
    • https://medtek.vn/storage/file/vanagipitamez.pdfIn PDF document text
    • http://pamatudarbai.lt/ckfinder/userfiles/files/71983250402.pdfIn PDF document text
    • https://salubrismd.com/wp-content/plugins/super-forms/uploads/php/files/683a119bc2612fd90f4ae19929158d4b/66138800327.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e44bbb3e925---5931780551.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8ebf39205---vuvonosepufane.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/f564ccea2e7acae85be8059497d8a1e4/36884029281.pdfIn PDF document text
    • http://nirmalapublicschoolerumely.com/userfiles/file/datodi.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B9A 17040 bytes
SHA-256: 4e6e92968acad101dcd6ca88e138bf416ebb4b60638dbc0f7f4cbfa70662b8ef
font_01_sfnt_off0001383b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1383B 10752 bytes
SHA-256: 123cffe47a0674dc8a5efb1b73cd01a4b4a25ba5f42f6255479140553c5a6f09