Malicious PDF — malware analysis report

Static analysis result for SHA-256 edf35f7b71ced79a…

MALICIOUS

PDF

69.3 KB Created: 2021-09-03 02:06:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 8a86782a619d3860b0ef981bbf55cbf5 SHA-1: 4d782c282e410900cffa871c01b963168b6e2f0a SHA-256: edf35f7b71ced79ad567b79951913a44e2a9d6aa15c4efe4ec0579b9b9fa18e2
154 Risk Score

Malware Insights

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

The PDF contains a link farm directing users to multiple external URLs, many of which are hosted on compromised CMS platforms or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious content or exploit kits. The primary attack pattern observed is the use of a PDF as a distribution mechanism for malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6374

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://fid-data.fr/app/webroot/uploaderfiles/40337862752.pdf In PDF document text
    • http://shopcloud.cloud//ckfinder/userfiles/files/73471569093.pdfIn PDF document text
    • http://cwpni.com/userData/ebizro_board/file/64202607879.pdfIn PDF document text
    • http://cngwalk.com/fckeditor/userfiles/image/43331735011.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/ujgrbgkqv8ncbla76i5553gbka/72937603035.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/20841590409.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca5f0ef853---rirulegokuparoriki.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607920ac09af8---55726593973.pdfIn PDF document text
    • https://saam.vn/images/content/file/27529507813.pdfIn PDF document text
    • https://marjoyunlar.com/calisma2/files/uploads/27542791962.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/37736713159.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/413e63c27e22000a17490cf0ead42336/43799416823.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/56e1bbe3e925a8ce2178a8cb154b864e/fojewokuwapabimokezegis.pdfIn PDF document text
    • https://ketdoanbus.com/webroot/img/files/bamegomive.pdfIn PDF document text
    • http://top1np.com/ckfinder/userfiles/files/rovikexafow.pdfIn PDF document text
    • https://tivicom.vn/upload/files/1285655728.pdfIn PDF document text
    • http://jingluo.net/uploadfiles/files/sekigorenuxufejapitemop.pdfIn PDF document text
    • http://morecoredesign.com/images/imageUps/files/15552443997.pdfIn PDF document text
    • http://formel1vermietung.de/userfiles/file/lujiveruwakorivatekopod.pdfIn PDF document text
    • http://nova-auto.com/upload/xudefugasiniratazal.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/fusifogipunokidi.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/6dba07ed0407c55ac17c61755f252b67/buxizimejawimemero.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/9mnmm8h47e1gfl7f2fi4ob43ht/jekasula.pdfIn PDF document text
    • http://archifolder.com/userfiles/files/90577384544.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=ets+gre+book+latest+edition+pdfPDF link annotation

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