Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d5c0c8e76bffa43…

MALICIOUS

PDF

52.6 KB Created: 2021-09-03 11:51:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ac09d8fe05f486d9d4ab279e90357dbf SHA-1: c9e2289fc76ae53b0cd16bd3824e01a8ce026bbf SHA-256: 4d5c0c8e76bffa43909ebc4a28a26526efe2310aaa89378203dacbdbda14fcb4
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous compromised WordPress upload directories and other disposable hosting sites. This structure is characteristic of phishing or malware distribution campaigns, aiming to lure victims to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7407

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 http://hjtech.org/admin/upfile/file/16951431558.pdf In PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b6235f5d8d7---23596833510.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b36faf91c---87820447418.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db1b2b5faf0---wezawi.pdfIn PDF document text
    • http://ferrogep99.hu/static/media/file/guvinoduribalita.pdfIn PDF document text
    • http://agriturismocorteerbatici.it/userfiles/files/75823844803.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/c22109166beb548e42da2fd3c23b4560/sesipatanedosexovisipubeb.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/6950d2b232aeaf093e6d4c9f28a86593/54889759657.pdfIn PDF document text
    • http://esthebel.de/userfiles/file/13461542223.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160acf4cfa368c---pazile.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/segepizide.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609e9f5e72c2c---fupakavekidilujifigoj.pdfIn PDF document text
    • http://bakoca.hu/files/file/40331370563.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/tmdis5r2ad8f9knf2oq6a09c95/xasinowevopu.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/rufoxofuloretukis.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e0e6d9369---42042369877.pdfIn PDF document text
    • http://ingpiazza.eu/userfiles/files/bolarusonewunepazifamike.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/648c2b386f40b0ff7bf95d0e97b53f6c/tinerubifaz.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/jk4md67qk9hjeoteeuug88b7ch/40670840127.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/78f14243cb05c981e88483a660006776/3176023407.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/v5rrgoj13k1lv9a7n451fqkl49/rowulogepudi.pdfIn PDF document text
    • http://sunrui-ti.com/d/files/63589998018.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/pIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=homelite+38cc+chainsaw+manualPDF link annotation

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