Malicious PDF — malware analysis report

Static analysis result for SHA-256 1099f9be6e41f9e0…

MALICIOUS

PDF

64.0 KB Created: 2021-09-01 01:26:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d9d1d25ad8cf00b433ea31dc994da2f9 SHA-1: 2bf83e277f23984e4f0d4481d7bb53b5f42a9bdb SHA-256: 1099f9be6e41f9e06df49109c58c7ffa32bbf2d87586f978cbb4ee7354f2d1c4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites and disposable domains. These links likely serve as a distribution mechanism for phishing or malware, leveraging the compromised sites to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7669

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://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/2c1f54627ab2bcbf574b4dd0afa74bd3/52327556306.pdf In PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16108aae251499---noxax.pdfIn PDF document text
    • http://dmhu.eu/uploads/uplib/file/63325257952.pdfIn PDF document text
    • https://truckforceone.eu/upload/editor/file/83047557812.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/1c415bbaabae3421067f715deffa32fb/taxomabuveninowiv.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/8672d69187aaa297dd4bf34d41590a82/18824464044.pdfIn PDF document text
    • http://www.tomasjelinek.com/img/pub/file/87485641721.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160c77bb8be875---88292926909.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/19600881803.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b79ec10f11c---nefisuwi.pdfIn PDF document text
    • https://hanurichurch.org/ckfinder/userfiles/files/wolaxewosebuwerovefune.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/375ddbd2ee3f2a64d7ce8d81b69ca8ec/92052341018.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/kisirenejiw.pdfIn PDF document text
    • http://dienlanhtruongson.com/upload/files/72128362087.pdfIn PDF document text
    • http://vhshf.de/File/97420209030.pdfIn PDF document text
    • http://grandinhr.eu/images/user/file/79746969570.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160763eb22af83---wunejoponozorovemofom.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/16074d9f82508a---mapuwupimum.pdfIn PDF document text
    • https://aakritidigitals.com/userfiles/files/29038633174.pdfIn PDF document text
    • http://nc-israel.ru/upload/files/26808660663.pdfIn PDF document text
    • https://pioneerlift.com/upfiles/editor/files/35889426981.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/dd8cc3b7a03bdf9edb8ff0aab51ed2a6/61528762766.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/18787060081.pdfIn PDF document text
    • http://cl-metalparts.com/d/files/vubowusen.pdfIn PDF document text
    • http://akifkasaboglu.com/esatfisek/images_upload/files/wevigikoburonedoz.pdfIn PDF document text
    • http://rideabikenews.com/user_img/files/24242012764.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160744b15c9e38---bobovewudosipasuseguze.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=b+tech+computer+science+notes+pdfPDF link annotation

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