Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c48edb76224dc67…

MALICIOUS

PDF

69.3 KB Created: 2021-09-07 18:53:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 880586904807a1f3474a570b801f466d SHA-1: c8ed263d324bc0f79f426db3f3e6961f148df27d SHA-256: 5c48edb76224dc676c5b4bbb56bccb99c2106c2d2cf396098a11ce6a11a36fa2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a link farm that redirects through multiple domains, some of which are hosted on compromised CMS uploads, suggesting an attempt to obscure the final malicious destination. The presence of numerous unknown URLs points to a broad phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8329

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.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/48098f956279badb12d43dfddc59f7b0/18703515272.pdf In PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/85300470f321527a6bf2f2cdaca90c0d/81540096722.pdfIn PDF document text
    • http://sca-eagleegg5k.com/ckfinder/triplebuserfiles/file/17667832425.pdfIn PDF document text
    • https://electrabicycles.pl/app/webroot/uploads/file/1629043522927.pdfIn PDF document text
    • http://harryreichert.de/uploaded_pics/News/file/tebazowuzudurenoj.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611ea1e8b39c7---94583641035.pdfIn PDF document text
    • http://aqs-group.it/userfiles/files/narixovobinuzeto.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/87193859814.pdfIn PDF document text
    • https://basisnomor.com/contents/files/tokibipewusevirifam.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1f77261f3---fulaluwogejinamimixejo.pdfIn PDF document text
    • http://plafondchauffant.fr//img/user/file/19726064472.pdfIn PDF document text
    • https://qqhanoman.com/contents//files/7195746043.pdfIn PDF document text
    • https://dm288.com/slicice/file/gejazomisagutakejajoli.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608f737a0253a---tofenusub.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b92f6e863d7---4084555637.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=batch+script+tutorialspoint+pdfPDF link annotation

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