Malicious PDF — malware analysis report

Static analysis result for SHA-256 a315ba8512e7c748…

MALICIOUS

PDF

67.9 KB Created: 2021-06-28 06:12:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 551040648a010320ca1eeb7819dbc782 SHA-1: e80cc0fbc0255a3f982e951cdd8a13ca49430196 SHA-256: a315ba8512e7c748ab3297d5ccff9e73cd2368e08524e00f99536ad9964ecd7e
154 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting it's designed to redirect users to malicious sites. The presence of multiple unknown URLs further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6678

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/701344f9bc8ee1e4dbb342a96b03dcf0/50481930927.pdf In PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/4i7ah7r2b4s8lc263nm6dhk841/18412985220.pdfIn PDF document text
    • http://marty-triple-m.ch/inhalt/files/43649713004.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608359b9720ef---kijiraketazaxe.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9fccb1364---zosezam.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/sugumozovixuvotuzesofipi.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/59663456684.pdfIn PDF document text
    • https://actor-conseil.com/files/file/zekinepomad.pdfIn PDF document text
    • https://airbays.com/userfiles/file/bigakozobobavirajaneduk.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/3852e7c7a6b28621c03e7f91e810d850/vevawezomapavuwofafepomiz.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acf2bf3e65e---50749172736.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16091cf7697962---pofegujup.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/rovavafeguwafaziv.pdfIn PDF document text
    • http://iberryhomemade.com/userfiles/files/95934709009.pdfIn PDF document text
    • http://www.lnk-creation.fr/upload/file/wananupak.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c65c75d2aea---virax.pdfIn PDF document text
    • http://robertfeinberglaw.com/images/edit_images/file/luvofojinupamexuzonoberep.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160764cc413a20---piwuru.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c38e2467860---dupofebut.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/257b97341c35448136e5dbfc7a61a764/20483683294.pdfIn PDF document text
    • http://computer-rudolstadt.de/upload/file/43869676760.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/03939f038fdd5bc31919f7853adeddc9/tomixotasagetesaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=how+to+make+a+rubber+band+gun+out+of+paperPDF link annotation

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