Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b14b43c6bf40ad9…

MALICIOUS

PDF

64.0 KB Created: 2021-09-19 15:17:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: df2975ad714c8ad8ef702f29a104be46 SHA-1: 2b2ee750b065a253418ca7706a54fa19974fa510 SHA-256: 6b14b43c6bf40ad9e2ed9b6f1b20bdf10e1fdf28a321adaf91927b96ad8099fa
124 Risk Score

Malware Insights

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

The file is identified as a PDF containing numerous links, many of which point to compromised WordPress sites and disposable domains. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent, likely to lure users to phishing sites or download further malware. The presence of multiple external URIs and link farm heuristics indicates a deliberate effort to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3846

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://drafthe.ru/uplcv?utm_term=auld+lang+syne+piano+pdf PDF link annotation
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613ef50b8e817---sisuramexeriv.pdfIn PDF document text
    • https://libertyrealestate.in/ckfinder/userfiles/files/24043634165.pdfIn PDF document text
    • https://dom-titan.rs/files/62441312399.pdfIn PDF document text
    • http://champaigncursillo.com/userfiles/file/71964413355.pdfIn PDF document text
    • http://client.diffuse.info/files/linakoxuxaf.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/fixarigovegiwuxixon.pdfIn PDF document text
    • https://vietnam-pump.com/userfiles/file/fukiza.pdfIn PDF document text
    • http://stensoproject.com/userfiles/files/29378244115.pdfIn PDF document text
    • http://wxhsbl.com/ckfinder/userfiles/files/20210913_205109.pdfIn PDF document text
    • https://alummaswaja.com/yii/sdbalikpapan/home/images/upload/files/58829679777.pdfIn PDF document text
    • http://cn-daomeng.com/upload/userfiles/files/9659ebd20fe67987711f986508152142.pdfIn PDF document text
    • http://www.lbtfilm.com/uploads/files/72785525145.pdfIn PDF document text
    • http://sm300159.agchost.com/userfiles/files/81913689381.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/11424194716.pdfIn PDF document text
    • http://erpsamik.com/ckfinder/userfiles/files/42982079436.pdfIn PDF document text
    • https://oreopay57.com/ckfinder/userfiles/files/77129605245.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143ef300a263---datesuganozu.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612eec256041d---kexarigiviloxupenaju.pdfIn PDF document text
    • http://kimwendelldesign.com/ckfinder/userfiles/files/32394067314.pdfIn PDF document text
    • https://inprovitcolombia.com/ckfinder/userfiles/files/52281475688.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/af0930c2c35cde24a163b37c7b63ad06/25100872762.pdfIn PDF document text
    • https://egca.fr/userfiles/file/87481339544.pdfIn PDF document text
    • https://lawweb.info/mycms/admin/userfiles/file/zibinonawolok.pdfIn PDF document text
    • http://cukrarska-vyroba.cz/UserFiles/File/47407088003.pdfIn PDF document text
    • http://taemyung.com/data/upload/file/77387355541.pdfIn PDF document text
    • https://muacash.com/webroot/img/files/zajugujemiledegudoditiber.pdfIn PDF document text

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