Malicious PDF — malware analysis report

Static analysis result for SHA-256 614d8145d12f08bf…

MALICIOUS

PDF

59.5 KB Created: 2021-09-18 22:43:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 265ec909cf88e4fb3676fc36fd42c992 SHA-1: 805f366185e59cb0700a5052711fd2e6c756d349 SHA-256: 614d8145d12f08bf1330808871ec661959e28ba00d7f2484653959bbcee79888
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. Static analysis reveals a link farm structure, with multiple URLs pointing to compromised CMS upload directories, suggesting an attempt to host malicious content or redirect users. The presence of external URIs and the overall structure indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3485

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://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/9117e798b5098e48dd898637d9a48d67/zuduxeti.pdf In PDF document text
    • http://bfttacg.marketsearching.com/upload/files/93063165847.pdfIn PDF document text
    • http://khachsanmyngoc.com/upload/files/92866091295.pdfIn PDF document text
    • https://olterus.info/contents/files/57965906036.pdfIn PDF document text
    • https://davidfauquemberg.com/home/fauquemb/david/bbdg_site/userfiles/file/3831642835.pdfIn PDF document text
    • http://caytrong.vn/Images_upload/files/68203825069.pdfIn PDF document text
    • http://gadkowski.pl/repository/filemanager/file/18172560316.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613f965a1455e---tupujepugap.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a9abb4914e---jevisivabaxemirenisu.pdfIn PDF document text
    • http://abwplazaview.com/uploads/files/bizijizebu.pdfIn PDF document text
    • http://dautuck.com/uploads/userfiles/file/79188936135.pdfIn PDF document text
    • http://salondebellezaanamariaromero.es/ckfinder/userfiles/files/57339462481.pdfIn PDF document text
    • https://gemwares.com/userfiles/file/62544328609.pdfIn PDF document text
    • https://kottayammedicalcollege.org/CMS/ckfinder/userfiles/files/tajitusuwoso.pdfIn PDF document text
    • http://weighlessthisyear.com/ckfinder/userfiles/files/68123659952.pdfIn PDF document text
    • http://gammatradings.com/userfiles/file/99963215745.pdfIn PDF document text
    • http://studiofranzoni.eu/userfiles/files/wibaguzawaw.pdfIn PDF document text
    • http://klusjesindex.nl/images/uploads/71341297123.pdfIn PDF document text
    • http://uniquecharacters.com/upload/files/5949347161.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0de1a840b---25539899055.pdfIn PDF document text
    • http://studioarchperissinotto.eu/userfiles/files/pedirisiragarixogonenudo.pdfIn PDF document text
    • https://profipreklady.cz/www/ckfinder/userfiles/files/kewabemuvodav.pdfIn PDF document text
    • http://ned.ru/uploads/files/88064656357.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/9f1trai87qa3cllvvf0ii65k96/62653930300.pdfIn PDF document text
    • http://woodlander.sk/grafika/file/52560851363.pdfIn PDF document text
    • http://classicalgardenfountains.com/uplds/file/tetoveruxajonilolalavi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=talking+tom+unlimited+coins+and+diamondsPDF link annotation

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