Malicious PDF — malware analysis report

Static analysis result for SHA-256 66a51f106b345f6f…

MALICIOUS

PDF

55.3 KB Created: 2021-09-22 12:34:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e8de0dab4cba04614f7931d317b3f7ba SHA-1: b6715f874ea130d6855461305c9f2e85cbf3d98d SHA-256: 66a51f106b345f6fd62d645d026fa693c8ba7380c8be292f212a1452d76cb4ab
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many hosted on disposable domains or compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content. ClamAV detected this as Pdf.Phishing.Trojan, and ML classifiers also flagged it. The presence of embedded URLs and the nature of the link farm indicate an attempt to lure users to external sites, likely for malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5455

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 http://bertrandetgastineaudesigners.fr/userfiles/file/xupojerovorawaf.pdf In PDF document text
    • http://hagelkonzept.de/userfiles/file/penexevesej.pdfIn PDF document text
    • http://henghuitong.com/jingkelun/userfiles/files/20210918035122.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/161305ce7db23c---xopevamitagivew.pdfIn PDF document text
    • https://agriplan-rs.com/dados/ckfinder/files/wavixopadoxebira.pdfIn PDF document text
    • https://ahreco.com/uploads/news_file/78667158477.pdfIn PDF document text
    • http://www.cddfct.com/up_files/file/wuzakutadumaxe.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16143e65d6457e---fufejokojizobapaverogopi.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f965d8d4ac---puwaferelim.pdfIn PDF document text
    • http://megamento.com/_UploadFile/Images/file/15052021336.pdfIn PDF document text
    • https://solener.info/ckfinder/userfiles/files/mepopufikuvoniraxu.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613c4b5adda5a---zomafujoriv.pdfIn PDF document text
    • http://backupcenters.com/userfiles/file/zomaxefi.pdfIn PDF document text
    • https://phatgiaolongan.com/upload/ckupload/files/lavawajabafupiloj.pdfIn PDF document text
    • http://strandedtattoo.info/file/99481072254.pdfIn PDF document text
    • https://viadagio.be/userfiles/file/11742504023.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/zowitanafiso.pdfIn PDF document text
    • http://ydyb.com/filespath/files/20210921083626.pdfIn PDF document text
    • http://centrons.com/uploaded/file/361513470613ec1271d447.pdfIn PDF document text
    • https://realxenon.ru/uploads/files/59265936576.pdfIn PDF document text
    • https://geelaboba.dswip.com/ci/userfiles/files/27350540026.pdfIn PDF document text
    • http://frickcontrols.com/uploads/files/26964501172.pdfIn PDF document text
    • https://anninhsieuthi.online/upload/files/77476447377.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=leo+privacy+guard+old+versionPDF link annotation

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