Malicious PDF — malware analysis report

Static analysis result for SHA-256 471def7dfabb1bb2…

MALICIOUS

PDF

52.6 KB Created: 2021-09-07 23:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: f084f5eb27715adde84f57024fbd667d SHA-1: aa23d90ead1e81b1f6fbb0a8084cb343eb2bc641 SHA-256: 471def7dfabb1bb218a88f76afc980385c33ff06897adb1f626adfe98c712967
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed for malicious redirection. The ClamAV detection and ML classifier strongly suggest this PDF is a phishing or malware delivery vehicle. The presence of external URI links and link farm heuristics points towards an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6720

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://markmont.eu/editor_uploads/system/files/razuwopes.pdf In PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070f2781b85f---68087330873.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d4ab3c26f02---68754342566.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/05/24/file/20210524_093233_123.pdfIn PDF document text
    • http://fuoriscena.eu/file/69955876692.pdfIn PDF document text
    • https://topplene.com/upload/ckfinder_temp/files/20210613153535.pdfIn PDF document text
    • http://bitree.net/ckfinder/userfiles/files/84782962928.pdfIn PDF document text
    • https://festival-bg.com/media/ckuploads/files/40300897118.pdfIn PDF document text
    • http://smingames.com/ckfinder/files/6759874153.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/dufer.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/1t9esnge8ihl9emuun0jsmgq84/6082870168.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e5870a1961f---1243970272.pdfIn PDF document text
    • https://chuyennhakienvangvn.net/upload/files/gevikomirukumuposarofitub.pdfIn PDF document text
    • http://mikomisushiwc.com/uploads/files/zuxojobevuviwativ.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1610d0efc5856c---88365411123.pdfIn PDF document text
    • http://pmmagic.vn/userfiles/file/waxovutuzanenefaxiju.pdfIn PDF document text
    • http://kovove-ploty-brany-zabradli.cz/UserFiles/File/kulusizudigekidebodi.pdfIn PDF document text
    • http://www.bongbansaigon.com/uploads/files/kuwuxiwakub.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf8ff15b48---91462632873.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/76m38o7umua2fq882tli6qbb2k/danikewo.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608d534164206---1347639620.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c1af62b0ee1---34751716740.pdfIn PDF document text
    • http://ezibra.pl/upload//file/sisemuzinukalanetexi.pdfIn PDF document text
    • http://kraski-chernila.ru/resources/file/vajisujufoxoremola.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=percent+increase+and+decrease+word+problems+worksheet+with+answersPDF link annotation

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