Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5551552bb827969…

MALICIOUS

PDF

60.8 KB Created: 2021-07-22 15:02:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a18df1a6c48324c061cbc05274bc63b4 SHA-1: a78985a372143ffa0c0de037ffac77439ca8d0b3 SHA-256: f5551552bb827969dd9802f1a5b1012d23320235154fc07841664c7389be0d83
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains a link farm pointing to multiple domains, many of which are hosted on compromised WordPress sites or disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of embedded URLs and the nature of the heuristics indicate that this PDF is designed to redirect users to external, potentially harmful, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8982

Heuristics 5

  • 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
  • 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.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16074c17e90f19---sotekimotuneligemutujagun.pdf In PDF document text
    • https://educhina.mn/editor/files/25387901478.pdfIn PDF document text
    • https://0900107678.com/upload/file/43944734833.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16095d92a6c6ad---pajerikudowolimemubu.pdfIn PDF document text
    • http://smclassof57.org/clients/34860/File/85311958353.pdfIn PDF document text
    • http://www.celso.org/download/88121891813.pdfIn PDF document text
    • https://betenenergy.com/sites/default/files/file/lidajowijuludirup.pdfIn PDF document text
    • https://bhsbeacon.com/FCKeditor/file/potiso.pdfIn PDF document text
    • http://debandhelder.nl/ckfinder/userfiles/files/12105565547.pdfIn PDF document text
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/junusiwifug.pdfIn PDF document text
    • http://zge-led.com/luodan/images/userfiles/file/vokubotedewisef.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608658b836571---76979637379.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f1b80e2cfaa---49273101520.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/97713521538.pdfIn PDF document text
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/f0676cc8602abf0b8b09084fa1c10b0d/xisivewave.pdfIn PDF document text
    • https://dadrarad.ro/userfiles/file/xubup.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/59c8123a137a1abe8b06409b636e4b19/96402231747.pdfIn PDF document text
    • https://nirmalujjwal.com/public/ckfinder/userfiles/files/36824939904.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/4373f253f45e797bb38966ca5482fa1c/71948092553.pdfIn PDF document text
    • https://bravo-hk.com/userfiles/file/vugaxik.pdfIn PDF document text
    • http://nakakinpump.kr/fckeditor/upload/file/xarex.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b30e111d23---dakotefasafoxotuwemomuj.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071516d8b764---70672420904.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c056dc25a2c---27371914680.pdfIn PDF document text
    • http://myphamlulanjina.com/upload/files/gameb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=10am+cst+to+mstPDF link annotation

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