Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eb937ae8c620076…

MALICIOUS

PDF

63.7 KB Created: 2021-10-06 06:48:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 14a9fdf552d96a7f1d9870cbf7063c52 SHA-1: 455e7748e88110a647a8c6454dcc6fed3d8b8de4 SHA-256: 4eb937ae8c620076696548483b04751af5c8593f5a32a069d46c1571228c9307
154 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The presence of multiple compromised CMS upload links further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6381

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://runnersavezzano.it/public/userfiles/file/vokiv.pdf In PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/ofcusk7njv4dp4d59fg6se9jv0/zomukokitafedifiwul.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613542a461459---10699745752.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/28188989885.pdfIn PDF document text
    • https://longhoang.vn/upload/files/vibagisifugu.pdfIn PDF document text
    • http://ydtmuhendislik.com/ckfinder/userfiles/files/93542165555.pdfIn PDF document text
    • http://ff-engineering.com/userfiles/files/dixigir.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1615892278d487---tixuzas.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/161465e12dd0d4---pebibeteze.pdfIn PDF document text
    • http://planbmedia.hu/files/kexavubomititipiketur.pdfIn PDF document text
    • https://alutat.com/data/file/nusami.pdfIn PDF document text
    • http://hexindechem.com/upload/files/27237036695.pdfIn PDF document text
    • http://xn--k1akb4c.xn--p1ai/userfiles/file/46168522210.pdfIn PDF document text
    • https://bokaichenyu.com/upload/files/58693271219.pdfIn PDF document text
    • http://azbuka-d.ru/ckfinder/userfiles/files/8508895598.pdfIn PDF document text
    • https://pmsp-me.com/userfiles/files/namozaxuwawexuwiz.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/57342579680.pdfIn PDF document text
    • http://pushgroup.lv/userfiles/files/90709762699.pdfIn PDF document text
    • http://vin-baietii.ro/ckfinder/userfiles/files/84886570299.pdfIn PDF document text
    • http://clickvay.com/upload/files/rewepefogir.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/82575397305.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/sewaletoz.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145c8fb36509---nerenujixukurob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+change+screen+lock+time+on+androidPDF link annotation
    • http://cluster006.ovh.net/~greeters/namur/ckfinder/userfiles/files/22399075864.pdfIn PDF document text

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