Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cb63704c77ccb0e…

MALICIOUS

PDF

56.7 KB Created: 2021-09-23 18:30:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 810f972aa1208bfc996430d091b37aa7 SHA-1: 852f724bdbcd5d190f90af4c6f4ea7f309c9ced9 SHA-256: 6cb63704c77ccb0e7ed3227d019a25c87c26457406f30b11d249fd8ad50bef06
154 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious. Heuristics indicate it functions as a link farm, directing users to multiple compromised or disposable hosting sites. The embedded URLs, such as http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16137978994dcc---xaronavuxiw.pdf, are likely used to distribute further malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5046

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 http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16132927cb8116---joketifokakod.pdf In PDF document text
    • https://www.karelo.com/uploads/File/94111405783.pdfIn PDF document text
    • https://heart-calligraphy.com/uploads/files/202109171549546551.pdfIn PDF document text
    • http://kajo-frings.de/userfiles/file/sotasamibapixomolu.pdfIn PDF document text
    • https://getracemirates.com/userfiles/files/89307544702.pdfIn PDF document text
    • http://digitalpolicycouncil.org/imagenes/file/xawodogemigunopipoxukolar.pdfIn PDF document text
    • http://www.specemc.ru/upload/files/ronaxowukaverasi.pdfIn PDF document text
    • https://aventura-agence.lu/userfiles/files/99417361881.pdfIn PDF document text
    • http://prospekt-rostov.ru/ckfinder/userfiles/files/lisokokumezamopejawi.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/rarixosiditavifawujowem.pdfIn PDF document text
    • http://silarperu.com/UserFiles/file/93269269271.pdfIn PDF document text
    • http://dolinakrzeptowa.pl/public/upload/ckfinder/userfiles/files/fedejimeluvazizidise.pdfIn PDF document text
    • https://vadihosting.com/calisma2/files/uploads/busowulufejatukasutugode.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16137978994dcc---xaronavuxiw.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/37e29b84ed749958192ab77445d436db/59243558993.pdfIn PDF document text
    • https://mimpiindahsatu.com/contents/files/xoroxejawopaxebezote.pdfIn PDF document text
    • https://millersexpress.com/userfiles/file/32411237380.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130628410b17---bupiwabe.pdfIn PDF document text
    • https://swapnauraan.com/ckfinder/userfiles/files/junusebizuvixifixusipar.pdfIn PDF document text
    • http://gachmenminhchien.com/media/ftp/file/mobuzozesakelezeji.pdfIn PDF document text
    • http://pcserviszlin.cz/ckfinder/userfiles/files/33453821680.pdfIn PDF document text
    • https://learnrkb.jugalbandiresearch.com/ckfinder/userfiles/files/fogirusafed.pdfIn PDF document text
    • http://chaodontuonglai.vn/uploads/ck_upload/files/wikinelexirudavowem.pdfIn PDF document text
    • http://theheavent.com/userfiles/files/rizepuxujenafupapod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=apk+call+of+duty+black+ops+4PDF link annotation

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