Malicious PDF — malware analysis report

Static analysis result for SHA-256 1413affeedbed195…

MALICIOUS

PDF

56.7 KB Created: 2021-09-12 15:08:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: cca714257bb8451a2c00ef41a9763a56 SHA-1: f50ccca1b2c25c4e57e140fe2bf845a2eecf939b SHA-256: 1413affeedbed1956f6797be68345f7b1a93f541a4c9ffe858ec842b1d48cca5
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and exhibits characteristics of a phishing or malware distribution campaign. It contains a large number of external links, many hosted on compromised or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded JavaScript, though not fully analyzed due to obfuscation, further supports the malicious intent, likely to facilitate the download or execution of a secondary payload.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4017

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pixomot.ru/uplcv?utm_term=setting+gyro+pubg+android PDF link annotation
    • http://nagyberki.hu/sites/default/files/fck_uploads/file/xokibamu.pdfIn PDF document text
    • http://ibnuaffan.com/ckfinder/userfiles/files/viwosodixotorolila.pdfIn PDF document text
    • http://www.its-dph.cz/admin/fckeditor/editor/userfiles/file/kolamuto.pdfIn PDF document text
    • https://ptogel1.com/contents/files/94295995086.pdfIn PDF document text
    • http://oletrans.sk/editor_uploads/files/65634071014.pdfIn PDF document text
    • https://monyetmesum.com/contents/files/87779704307.pdfIn PDF document text
    • http://onfireinteriors.com/userfiles/49068475787.pdfIn PDF document text
    • http://algarestofos.pnh.pt/js/ckfinder/userfiles/files/wuzefuzivadorapamipizile.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/16139f75279b91---58247943827.pdfIn PDF document text
    • http://khonggianmang.com/upload/files/kazonaralasedazifavizogix.pdfIn PDF document text
    • http://esteel.my/userfiles/file/joromajip.pdfIn PDF document text
    • https://spvi.cn/filespath/files/20210902144822.pdfIn PDF document text
    • http://custom-mugs-factory.com/uploadfile/files/mojubebogininigevaro.pdfIn PDF document text
    • http://www.anaja-inter.org/public/file/fuzinagamopilixotat.pdfIn PDF document text
    • http://boletos.luzservicos.com/ckfinder/userfiles/files/42414876451.pdfIn PDF document text
    • https://betenrealestate.com/sites/default/files/file/13248939422.pdfIn PDF document text
    • https://resicolor.com/upload/files/xefuporobadodo.pdfIn PDF document text
    • http://flyingwedge.com/uploads/assets/file/99681298110.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1613d16cacba95---35601503935.pdfIn PDF document text
    • http://velocimapper.com/webfiles/file/13119789004.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/17646803606.pdfIn PDF document text
    • http://zabbeleecooking.com/ckfinder/userfiles/files/fusafewejij.pdfIn PDF document text
    • https://tradingcall.in/ckfinder/userfiles/files/fojomiwadokip.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/161376b566cc05---49541108074.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16135e10fa0dc0---94936875344.pdfIn PDF document text
    • https://sanaspinler.net/calisma2/files/uploads/kisekoxuj.pdfIn PDF document text

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