Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5ebfe0ffa57e738…

MALICIOUS

PDF

50.2 KB Created: 2021-09-16 15:53:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e658c335c37c7534f49c1ba1b558b5e1 SHA-1: 3f2b1e188f23fc7e74354f3d9d38259f09dc79f9 SHA-256: a5ebfe0ffa57e73895022ce591eb9a81a542796f3ec914ea5899e0238f0ff7d1
154 Risk Score

Malware Insights

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

This 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, directing users to multiple compromised websites that host other PDF files. The presence of numerous links on disposable or compromised hosting suggests an attempt to manipulate search engine results or distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6227

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://firsatoyun.com/calisma2/files/uploads/bimuka.pdf In PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/7f9d07dcb1587449ba10fe0bb05e0445/xadufibujok.pdfIn PDF document text
    • http://lubrifianti-auto.ro/files/file/81679116916.pdfIn PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/guriguxeseratudirige.pdfIn PDF document text
    • http://uzmansporzeminkaplama.com/resimler/files/74434075076.pdfIn PDF document text
    • http://khyljg.com/uploadfiles/files/93813438288.pdfIn PDF document text
    • http://divorce-difficile.fr/userfiles/file/xojizupulixi.pdfIn PDF document text
    • http://jinruily.com/UploadFile/file/20210910210003536.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/d630de420980587d47439d1433e14e20/55068296889.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/xurokemutokefamuredukod.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/28266448540.pdfIn PDF document text
    • https://medarbindia.org/ckfinder/userfiles/files/63707863836.pdfIn PDF document text
    • http://kunas.lt/app/webroot/uploads/files/lewagurunotofolag.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136f917b6bdf---64020115180.pdfIn PDF document text
    • http://abyss.sk/userfiles/file/jafeboju.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/7625899e3f3758de8aa6afb62056de94/38548837159.pdfIn PDF document text
    • https://bokaichenyu.com/upload/files/vinajekatuwulofepizobax.pdfIn PDF document text
    • http://asu78.ru/userfiles/file/vifojoli.pdfIn PDF document text
    • http://englandmatchshirts.com/assets/file/85366673084.pdfIn PDF document text
    • https://mundolibre.cl/uploads/userfiles/files/lejawarorokofogese.pdfIn PDF document text
    • https://wonkingchina.com/d/files/ligujavik.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/007862ca8e76df620822885bf04b0101/nivesubodozazowu.pdfIn PDF document text
    • https://fwstc.in/userfiles/file/52067397799.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=resident+evil+3+nemesis+ps1+isoPDF link annotation

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