Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c49acc536e2bf95…

MALICIOUS

PDF

48.0 KB Created: 2021-09-06 15:59:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 23ac07be20fc2540398fd40bbe78d5d7 SHA-1: ada1da9db0f194bfe601a44dedc92b1e4263d563 SHA-256: 0c49acc536e2bf95abd9c97c6109dc4c8d9895472dee59c6bb24d881ecc2f134
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6441

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 https://firsatpin.com/calisma2/files/uploads/sajonusifib.pdf In PDF document text
    • https://299-45.com/CKEdit/upload/files/50140828098.pdfIn PDF document text
    • http://grupopiscis.com/upload/files/tiwafepowuvelojugotuto.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16092602506108---lixitipidakesokowuvige.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/13d032d40bc068f73b1ef78ea614b106/jesitiwitolikebego.pdfIn PDF document text
    • https://www.sherpachristain.org.np/ckfinder/userfiles/files/bumezosep.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612b43152adbc---84917536157.pdfIn PDF document text
    • http://merklink.nl/site/data/ws/files/vixezopepewadigodarozas.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/3113c6223b4664109530c01f9ff77130/semoxozizujasile.pdfIn PDF document text
    • http://teacherandtraining.com/coj_u/KK/userfiles/files/60577821574.pdfIn PDF document text
    • http://pjzhengwang.com/upload/file/20210717_063401_192.pdfIn PDF document text
    • http://kpghomerepairs.com/uploads/image/files/peliloxavedu.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607c687bd80d2---gubiki.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210522093511.pdfIn PDF document text
    • http://ccspatti.org/userfiles/file/zawabogawudejofosugob.pdfIn PDF document text
    • http://thetsaban3watnuea.com/UserFiles/file/16441755326.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/files/18858722823.pdfIn PDF document text
    • https://jecoexports.com/ckfinder/userfiles/files/lakabusi.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070319758c0f---63846473091.pdfIn PDF document text
    • http://mxm-hosting.nl/img/editor/file/zanalodenumikeduxutexaser.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d714157fc---wefojiroteselivanokawesis.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16103045504d8d---14766211074.pdfIn PDF document text
    • https://eminenceconstruction.ca/viking1/uploads/files/kevelekawe.pdfIn PDF document text
    • http://daphongthuyhueminh.com/uploads/image/files/28633230836.pdfIn PDF document text
    • http://xn--90aoj0agf7cq.xn--p1ai/uploads/files/85493858462.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=fluent+python+pdf+download+freePDF link annotation

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