Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc181759cd4cd916…

MALICIOUS

PDF

52.5 KB Created: 2021-09-17 12:14:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: bbd829e5ffc32b4b4b6dc5ca79f3b96f SHA-1: 7cd497875876922089883bf882c18ccea0066342 SHA-256: bc181759cd4cd9162b4693bb62ca2160e9da787192bd5425c0b072c29313dd5f
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by multiple heuristics and an ML classifier, including ClamAV identifying it as a phishing trojan. It functions as a link farm, directing users to numerous external websites, many of which are hosted on compromised CMS uploads or disposable domains. The primary purpose appears to be directing users to malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8385

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://inwebjor.ru/uplcv?utm_term=android+contact+location PDF link annotation
    • http://studiotipaldo.com/userfiles/files/36173534141.pdfIn PDF document text
    • https://atputasbazes.lv/images/userfiles/files/25022345380.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/63becceb339352c9df111d3c3a6f7986/87541182276.pdfIn PDF document text
    • https://appchecar.com/ckfinder/userfiles/files/45383363518.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/e4de49da98ac78422ef6ba739c139b49/fopowox.pdfIn PDF document text
    • https://tatsolarlight.com/uploads/files/70042434132.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fb180b5858---4616402412.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/wipusivexazakejixoroben.pdfIn PDF document text
    • http://gajagotour.com/UserFiles/file/midoge.pdfIn PDF document text
    • http://plymouth-logs.co.uk/ckfinder/userfiles/files/kikakilalemusa.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea6703a9bc---mesiturevaxipisamuxolepo.pdfIn PDF document text
    • http://kvrhousing.com/uploads/29824862248.pdfIn PDF document text
    • http://sunnyten.net/userData/board/file/kudugubezasudofaranunabu.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16140632a4d18b---59111674387.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/e68l9bbfh0o2075c35402i8sf7/7160747484.pdfIn PDF document text
    • https://dimensionshoppe.com/alpha/ckfinder/userfiles/files/wujotukodubebosuvatozaju.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/q43b597bj7gf96e0aisnaf4mtb/84356941655.pdfIn PDF document text
    • http://krakow4you.pl/krakow/files/9969678605.pdfIn PDF document text
    • http://ebd.su/UFD/7623/files/lavetasavise.pdfIn PDF document text
    • https://www.dtd.com.pk/ckfinder/userfiles/files/lokalepanu.pdfIn PDF document text
    • http://ipmarketing.net/FCKeditor/editor/filemanager/connectors/userfiles/file/xevute.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1614012a1d346f---56226959652.pdfIn PDF document text
    • http://pilot-market.ru/new/files/file/70175727402.pdfIn PDF document text
    • https://eksiliotomotiv.com/upload/ckfinder/files/45323788504.pdfIn PDF document text
    • http://thuaphatlailongthanh.vn/upload/contentFile/minhchau/file/baxiwopodewujasaz.pdfIn PDF document text
    • http://hometextiles-consultant.com/ckfinder/userfiles/files/jujawufiseguwide.pdfIn PDF document text

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