Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d2a4951236deac0…

MALICIOUS

PDF

55.0 KB Created: 2021-09-16 23:29:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6648df92dc97f036143ecc139c7ded85 SHA-1: 67055ca672c01bd1734da1ef8242330028b47e43 SHA-256: 3d2a4951236deac0644bd9e5945705fa948a603357d8dc45201f5c21b624fb67
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 ClamAV and an ML classifier, indicating it is likely a phishing or malware distribution lure. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of 'utm_term' parameters in some URLs further supports a phishing or tracking intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5455

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://chcial.ru/uplcv?utm_term=def+jam+ppsspp+download PDF link annotation
    • http://j-line.ca/fck_upload/file/febewanojizaneviz.pdfIn PDF document text
    • http://boxshop.mn/userfiles/files/25026644128.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1612f642578968---karuluviviferewaweja.pdfIn PDF document text
    • https://delcinfo.ru/img/files/files/pikaxirovidunibuvowoteran.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/9696a1e99ae9eff3e09d3b8feab22fbf/86270898246.pdfIn PDF document text
    • http://studioiulianella.it/userfiles/files/newulikamopivizisameloget.pdfIn PDF document text
    • https://mmoxx.mn/userfiles/files/deluvuvufux.pdfIn PDF document text
    • http://reklamaopole.pl/userfiles/file/jodesutikumipesawabosu.pdfIn PDF document text
    • http://orvositudasbazis.eu/images/upload/file/katevavegazenenefem.pdfIn PDF document text
    • https://mountainbrookbuilders.com/home/mountain/public_html/ckfinder/userfiles/files/dametaleduwodusofumateju.pdfIn PDF document text
    • https://loyallcanada.ca/editor_files/file/89923991267.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/62ea7d170c77a3bd1f018fb7243e62a2/91792828083.pdfIn PDF document text
    • http://studioesflores.pl/obrazy/file/vovewepowavifeje.pdfIn PDF document text
    • http://toyotacri.com/userfiles/files/jexixaropusafedunabisu.pdfIn PDF document text
    • http://defhjdr.friend-match.com/upload/files/toxosuzunakuwelejur.pdfIn PDF document text
    • http://otczenacts.com/media/files/mixasubulinubavufebiw.pdfIn PDF document text
    • http://mynigaoe.com/upload/file/20210913223743.pdfIn PDF document text
    • http://kibbkw.com/uploads/files/didefatasusikojunolu.pdfIn PDF document text
    • http://hyeminshop.com/DATA/files/selolojuvilaxiwobuwiwupo.pdfIn PDF document text
    • https://confidence-ist.mktechsol.com/ckfinder/userfiles/files/fowova.pdfIn PDF document text
    • http://cdenito.net/userfiles/file/52678587436.pdfIn PDF document text
    • http://winfielddeli.com/ckfinder/userfiles/files/52541594753.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/rikofafi.pdfIn PDF document text

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