Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f21f6e028f3fc5c…

MALICIOUS

PDF

95.7 KB Created: 2021-09-02 04:38:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 72b02116471ff4f8dfc349665622d5a7 SHA-1: beccb2a735d34561a91b923c7648b942a2e63faf SHA-256: 7f21f6e028f3fc5cbacfbf8b5c4eede21d9218289890bae0c74043f479b8cfc4
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports this malicious intent. The ML classifier also flagged the PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6303

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://allytemp.ru/uplcv?utm_term=convection+conduction+radiation+heat+transfer PDF link annotation
    • https://mokshadhamnepal.org/userfiles/files/21896934370.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aad16575050---24002672327.pdfIn PDF document text
    • https://samowar.me/userfiles/files/27381668491.pdfIn PDF document text
    • http://vasekurzy.cz/userfiles/file/zajusinesawujolekoto.pdfIn PDF document text
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/4eed3c32706c6b933c64ffe68d696ca8/14644142200.pdfIn PDF document text
    • http://hzeiger.com/userfiles/file/6943384043.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608e32684cb93---40184194711.pdfIn PDF document text
    • http://iltorg.ru/upload/file/xetixejitewamexolitakuge.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/8e8a5596fc255e2c26db0baca6a62aa4/jelerujaju.pdfIn PDF document text
    • https://podereilmontaleo.it/writable/public/userfiles/file/xetod.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/511d09127680bdb952eccb8c0bcfaa7e/wanoxilarugofebaviro.pdfIn PDF document text
    • http://americansemitruckparts.com/d/files/84201402354.pdfIn PDF document text
    • https://nguyenvanhuongloc.vn/app/webroot/files/images/pages/files/66388413835.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/fikefowuletimizotikigax.pdfIn PDF document text
    • http://nineslash.com/user_file/file/lofafa.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161295ff7e8fd5---fawobobediroxuwipupa.pdfIn PDF document text
    • https://mobspace.xyz/web/img/podborky/files/gisebejir.pdfIn PDF document text
    • https://ka-base.no/images_content/file/jizevab.pdfIn PDF document text
    • https://grupa-energia.pl/attachments/file/fasoka.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a43b0049f---7165274834.pdfIn PDF document text
    • http://studioschicchi.eu/userfiles/files/silesatafam.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/e6231bc38303863bd59d864cb06e9629/pafavojif.pdfIn PDF document text

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