Malicious PDF — malware analysis report

Static analysis result for SHA-256 5280d662fdc563f9…

MALICIOUS

PDF

38.8 KB Created: 2021-09-04 12:09:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b8d027fb39010b79b8c38f9c3dfd21b4 SHA-1: 2a1da2b19b7754822e7305240efd9eb5b2e196f3 SHA-256: 5280d662fdc563f9b5a27c49b6ae333b71f70ed8e9e1e03ad2d00e786018d33e
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is detected as a phishing lure, utilizing an image-only format to conceal clickable links. These links point to various compromised websites, likely serving as a distribution point for malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8590

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 38 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 https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f91b8f77fe8---migaluwelakipukigulu.pdf In PDF document text
    • http://cableesmaltado.com/d/files/87418211806.pdfIn PDF document text
    • https://mayphotocopydogia.com/upload/files/dofevalajixegusirotejar.pdfIn PDF document text
    • http://homeopathyhongkong.cn/files/83347025076.pdfIn PDF document text
    • https://nusamulticentralestari.com/Uploads/userfiles/files/94717967303.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/90c90e45f3767a5b4d3edce22226d47a/bakafepuwa.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/tujmubida4ddet21fsqt5dco7s/48486058696.pdfIn PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/jokujepi.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/zemapovevobesiwi.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608d019af32c1---fijukugavevowixilikax.pdfIn PDF document text
    • http://abbuffalowings.com/uploads/files/nasavigimavoju.pdfIn PDF document text
    • http://vitalchurchesinstitute.com/files/file/sasutikibomasizuti.pdfIn PDF document text
    • http://assytekservizi.com/userfiles/files/sawofiv.pdfIn PDF document text
    • http://ghhs1968.com/clients/5/57/5762190d0a265df614d1f295a7060a42/File/xiliwifil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=dyson+v7+trigger+user+manualPDF link annotation

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