Malicious PDF — malware analysis report

Static analysis result for SHA-256 20353d69ffd4aeb2…

MALICIOUS

PDF

42.9 KB Created: 2021-09-13 15:13:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0fdb8909641666a33af0fcf4cf0992fc SHA-1: 922af1f6fb6167f02eb02b4f9147d9242baa3018 SHA-256: 20353d69ffd4aeb2d164d5fd5c2b5a327acf2e8078f7b36b0e15c826ed3a4bfa
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and a machine learning classifier. Heuristics indicate it's an image-based lure, typical of phishing, designed to trick users into clicking external links. The document contains a link farm pointing to various domains, some of which are compromised CMS uploads, suggesting an attempt to distribute further malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5746

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 42 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://zechnerbau.at/images/content/files/vorozotizewoju.pdf In PDF document text
    • http://hennel.hu/sources/elemek/file/gikekujaf.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b5694b1a0f---20354693924.pdfIn PDF document text
    • http://cheumst.com/upload/fckeditor/file/rowagubexegifazekof.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc429e062c---58667714136.pdfIn PDF document text
    • http://bio86.fr/userfiles/fichiers/91185749623.pdfIn PDF document text
    • https://muahohangnhat.com/app/webroot/uploads/files/nabizotojovakapagifesovi.pdfIn PDF document text
    • http://cbstav.cz/file/79546009431.pdfIn PDF document text
    • http://herborgthailand.com/file_media/file_image/file/lekekewokebovenidux.pdfIn PDF document text
    • http://gpszone.hu/upload/userfiles/file/95053230767.pdfIn PDF document text
    • http://hosungtour.com/FileData/ckfinder/files/20210902_8E83603234F4135B.pdfIn PDF document text
    • http://ketnoikienthuc.com/upload/files/ridufesekipusufuz.pdfIn PDF document text
    • https://tomas-music.com/contents/files/55316680646.pdfIn PDF document text
    • http://hanyuchina.com/upload/files/48227091421.pdfIn PDF document text
    • https://hunde-katzen.at/soubory/78453366135.pdfIn PDF document text
    • http://benetalent.com/upload/files/tonujulaju.pdfIn PDF document text
    • http://astmasme.com/userData/board/file/zuwososezolenaxox.pdfIn PDF document text
    • http://tv-sat.cz/userfiles/file/40256639390.pdfIn PDF document text
    • http://medob.org/SITE/files/editor/file/67652947700.pdfIn PDF document text
    • http://julianina.dk/upload/file/rejub.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137ab692df4c---57656412269.pdfIn PDF document text
    • http://exmar.it/foto_fck/file/75319814646.pdfIn PDF document text
    • http://krzeptowski.pl/file/56117138319.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/jademexita.pdfIn PDF document text
    • http://bobas24.pl/Upload/file/fobazafizefalinofemaw.pdfIn PDF document text
    • https://aymexco.ro/ckfinder/userfiles/files/wupiro.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=download+hill+climb+racing+2+pcPDF link annotation

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