Malicious PDF — malware analysis report

Static analysis result for SHA-256 0904e10fb14b6165…

MALICIOUS

PDF

45.6 KB Created: 2021-08-08 01:20:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 22f3d06c1df66b156d74f8a050e698c7 SHA-1: 7c7b1d11a3cbe593a375bb9a7055323925228ae0 SHA-256: 0904e10fb14b6165236f96bf79c3b321ebd8060b824ae3fa6487fcef3e0c4cae
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm or SEO poisoning attempt. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classifiers also flagged it as malicious. The presence of multiple compromised CMS upload links and disposable hosting suggests an effort to obscure the true malicious intent and potentially distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9379

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://pablohernandes.com/wp-content/plugins/super-forms/uploads/php/files/4aff0fcc4e80334dca7ba9ffdd10d45b/putovitiv.pdf In PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/04ad4d4ad1694afdcd0c364fc62ccd97/71486800943.pdfIn PDF document text
    • http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/4111096621.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/7a49641d5286cdd622f9a3f2c2b1cbbc/pulefedijega.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f47891ba6---12547986275.pdfIn PDF document text
    • http://briarcliff70.com/clients/874901/File/robunidamigorojosi.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd73ad4705---lufalejosuwewol.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076dfe5331b9---74834982714.pdfIn PDF document text
    • https://nevisnews.com/userfiles/82648799050.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160a72cd5861dc---sepikukekefu.pdfIn PDF document text
    • http://taitung-house.com/CKEdit/upload/files/zexerigebojebogekumimos.pdfIn PDF document text
    • http://pttaccounting.com/userfiles/files/muxowikumimuferus.pdfIn PDF document text
    • http://dohertylaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/10940044069.pdfIn PDF document text
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/hrhggc5lmciss8hf74m3tghrj2/xabewubutonuzizigofodenu.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/5dfdeeffa840821ef667a9f351899b97/suvodesimebadidariko.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acaa5c06400---69175751805.pdfIn PDF document text
    • http://planet-for-events.de/userfiles/file/wipolaruteduvinolakox.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021060815571473499.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/418f1ddb77b1aaaf2b02047295d7b8f8/puxebipatidageguridutuw.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/files/files/72271379854.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+know+what+size+kancan+jeans+to+getPDF link annotation

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