Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc68673cc140b792…

MALICIOUS

PDF

59.6 KB Created: 2021-10-04 17:15:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 3fdbcd06ed0bc88042287b6640bce706 SHA-1: 7a8f20c3369cea7ac6fdc58a5173a82a74570f67 SHA-256: bc68673cc140b79205b8958e691953f7d6c2f620af022a08920b6d1ea6e4c9a7
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to various domains, including those hosted on compromised WordPress sites. The presence of UTM parameters in some URLs suggests an attempt to track user engagement with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6988

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://smidgel.ru/uplcv?utm_term=eye+jumping+meaning PDF link annotation
    • http://kaies.cn/upfiles/file/68766088189.pdfIn PDF document text
    • http://platcometals.com/images/file/18567079082.pdfIn PDF document text
    • http://eko-gospodarstwo.eu/files/file/buvarinutebe.pdfIn PDF document text
    • http://gartenbaukoeln.de/uploads/files/puzazafebujanemajeponuwov.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141487c020d2---jeluxifajamusi.pdfIn PDF document text
    • http://dxczx.com/ckfinder/userfiles/files/20210930_190844.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/70289852376.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16150392e4cb9a---dupitaw.pdfIn PDF document text
    • http://thuonghieutoancau.vn/uploads/files/zixidekorozasuxebefafige.pdfIn PDF document text
    • http://edituj.cz/res/file/biful.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bf1cf61219---tefixoxenaxenorudux.pdfIn PDF document text
    • http://soosanfix.com/upload/fckeditor/file/12209812703.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1614e2d321c689---12007314582.pdfIn PDF document text
    • https://tidurmalam.com/contents/files/12989411556.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140bf94ae80e---vegubegumalegafipupujibo.pdfIn PDF document text
    • http://4226080.kad.tw/kads/ckfinder/userfiles/files/2979073748.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/0dr98e19bu6guc49l2cm2duk4i/6795880335.pdfIn PDF document text
    • https://trouver-une-ssii.com/img/pics/files/99505788227.pdfIn PDF document text
    • https://thokhoavietnam.com/upload/files/20527954660.pdfIn PDF document text
    • http://zulaikhatextile.com/userfiles/files/63162762316.pdfIn PDF document text
    • http://paneldeconsos.com/userfiles/file/13635296647.pdfIn PDF document text

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