Malicious PDF — malware analysis report

Static analysis result for SHA-256 390e1a20db1a28b8…

MALICIOUS

PDF

45.8 KB Created: 2021-06-29 02:11:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f4f6640baf29534f3507a03e74cee1f4 SHA-1: bf48e3b7a363f320dbc9c68c56f5c91dba5b7302 SHA-256: 390e1a20db1a28b8ba3b1f392af4da9bb003e659c35ee07600ac0699b9122d8b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised CMS upload storage or are hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the overall structure indicate an attempt to lure users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7355

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://allytemp.ru/uplcv?utm_term=best+quotes+of+all+time PDF link annotation
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9c60a437c---jokekejufimozobakodifexe.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/72988167995.pdfIn PDF document text
    • https://renfrewareahealthvillage.ca/ckfinder/userfiles/files/90425043325.pdfIn PDF document text
    • http://rungrawin-itt.com/userfiles/files/mepubudujasu.pdfIn PDF document text
    • http://controldellaves.com/app/webroot/arxius/file/zawelu.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/6e432e93fa5c4ebe5ed99a725c1a5b37/nolarutuwotom.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab4c3d7af6---bezunesa.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/b913a23f87eb9d59c9a680a30e2676e8/57300364599.pdfIn PDF document text
    • http://joyearland.com/ckfinder/userfiles/files/kaxiwuxeberotakuw.pdfIn PDF document text
    • http://sibmetiz.ru/upload_picture/joxomegoxenotigumopoganu.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb053e644f---27439292198.pdfIn PDF document text
    • http://maekalocal.com/Maeka/UserFiles/File/38606617495.pdfIn PDF document text
    • http://grandinhr.eu/images/user/file/37768256514.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/nasigenax.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/237242329f619ae015f1ac12385c9078/pakironojolazunu.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/si690aigu2edqsann2f9b97460/vojuxowekuzano.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/raluxofafakibofamiw.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3e402145db---vepipazex.pdfIn PDF document text
    • http://bjjiffy.com/upload/20593921141.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/99164727628.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a91e072ca88---xanabuz.pdfIn PDF document text
    • http://vhktn.at/images/content/files/20931391205.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/16074aecc84e2c---82694169211.pdfIn PDF document text
    • http://mudrkanuch.sk/editor_uploads/system/files/96057721262.pdfIn PDF document text

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