Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff53a0b4cb37ac1f…

MALICIOUS

PDF

49.8 KB Created: 2021-08-24 17:52:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9cab2ce9ca7fbf00dd31c2efcd37a2ee SHA-1: 273b604f8285e7ea5896a9e44cfaaeb2d127c1ba SHA-256: ff53a0b4cb37ac1f7767ffd6dbfd369bf3fc5420d2624b162ebc1f31c157b0e5
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised CMS upload directories or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure as a link farm suggests an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9083

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://ajwatravel.com/wheelmarine/userfiles/file/nojose.pdf In PDF document text
    • https://valstybestarnyba.com/upckfinder/files/fenujojan.pdfIn PDF document text
    • http://hochrainer-elsner.at/upload/files/xamasuwufotovevorivaf.pdfIn PDF document text
    • http://fiumaradelsossio.it/userfiles/files/kawamiwibusatig.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6f918c3707---wonumadozepajob.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/57573814912.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/53627568306.pdfIn PDF document text
    • http://studiogaleazzo.eu/userfiles/files/xovifisokokediradub.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094a3de3f958---fubomemupogenar.pdfIn PDF document text
    • http://baodieptailor.com/uploads/2021-06-23/images/files/98319446724.pdfIn PDF document text
    • http://robinsonfamilyreunion2021.com/clients/7/77/7769cd5c98d63cfb9738ae2db1c5c42c/File/19699647274.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca5c4360a6---besumesozog.pdfIn PDF document text
    • http://kag.fr/userfiles/file/43241369730.pdfIn PDF document text
    • https://usssecuritate.ro/userfiles/file/15492501084.pdfIn PDF document text
    • https://rosycaffe.com/file/12540319772.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2e9346921---25006840883.pdfIn PDF document text
    • http://ediljolli.com/userfiles/files/88440701658.pdfIn PDF document text
    • http://malabarisproducoes.com/arquivos/files/tawakobewovov.pdfIn PDF document text
    • http://benedictinoselrosal.org/ckfinder/userfiles/files/2496122193.pdfIn PDF document text
    • http://sjhrz.com/images/upload/File/76518749675.pdfIn PDF document text
    • http://oakgroveschoolheritage.com/clients/b/bc/bc5c94904a1f00f1300372e6f875146f/File/nopopolak.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/po40nqs1em75mjv9otvcmlign0/sekejoketudezorisa.pdfIn PDF document text
    • http://stonebreaker.at/43237549658.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=mutant+monsters+modPDF link annotation

Open this report in the interactive analyzer, or submit your own file for analysis.