Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dbec0e4ec84fe2c…

MALICIOUS

PDF

72.7 KB Created: 2021-07-21 17:35:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 762ae8f75f8ff8837756746ec75c92f5 SHA-1: debf14409bc34f4529350e20ecb63c833233e8eb SHA-256: 9dbec0e4ec84fe2c83332e5ae5dfc5ce51baf17218116b8cab53bb462b82ce96
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as a link farm hosted on compromised CMS uploads, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support its malicious nature. Although no scripts were extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8434

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://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160791ca69df8c---43609258907.pdf In PDF document text
    • https://stadion-nsk.ru/ckfinder/userfiles/files/46390989496.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160894c658d73f---94329465556.pdfIn PDF document text
    • http://teechart.com/uploads/images/files/56181318753.pdfIn PDF document text
    • http://screen.by/images/file/fejotuvuxifusabapiv.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c93975c0679---68968017392.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/tetogafafug.pdfIn PDF document text
    • http://royalgoodviewresort.com/Uploads/file/tusibodep.pdfIn PDF document text
    • http://delshadian.com/public/userfiles/file/folinawizepupa.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/d00b99788a8fe1be56b0a466afc6dade/73845746361.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/1682813c74b073bfb1a238ff82cd8458/54114351080.pdfIn PDF document text
    • http://industrialdevices.in/uploads/javuvepobunusudulel.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3939b85d01---31809250038.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/b2ee1da7ff293d1c1e5db94cd74e69c5/31871546437.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/4d88730ed3e7b8fadf7db906cdc5dd85/12276913212.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/491913293c4b8a080653d076d3f847cd/64772691803.pdfIn PDF document text
    • http://doubles301.jp/files/ckeditor/files/budexup.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/ufjl2d7pld5hsoggudtf0qqt8l/bukixukoxuguguzufu.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b9407fa48---12410470449.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16087dda97cb74---35819363225.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608543beafcfb---godajemoxonobufadir.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/nominesivezorol.pdfIn PDF document text
    • http://haenuri.net/ckupload/files/sofipomiku.pdfIn PDF document text
    • https://oversaslogistica.it/file/nixufusus.pdfIn PDF document text
    • http://dsraxys.com/uploads/kowisikerufafej.pdfIn PDF document text
    • http://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/zigaruvum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=hydroxyzine+hcl+25+mg+and+alcoholPDF 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_off0000f158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF158 11072 bytes
SHA-256: e21fbc0bc57f87abe8de7796a0985886944ee3b0064da7b732f872d56f7b437a