Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2fc5188b72046f5…

MALICIOUS

PDF

61.9 KB Created: 2021-06-08 09:01:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: b9ed3c828c6fd0cd1b37ef51d23ed1f5 SHA-1: 20f6b00b97f63d0e0e1f82297186725c8bd31fd3 SHA-256: e2fc5188b72046f5a90a697064a566461c21874d62e1dfe93eb2f5c41b43df14
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the heuristic firings and URL patterns are highly indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7016

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://philabc.ru/uplcv?utm_term=how+to+get+past+administrator+on+chromebook PDF link annotation
    • http://www.yoko-ono.be/images/userfiles/file/xudur.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/e418e7a490225c8cec2d23d52a70416a/85586664500.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7de1772bf---dokazotawijiridumu.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/6d268928e1b7aee399025cb2e9de6919/jonitugixilesuda.pdfIn PDF document text
    • http://atomleasing.ru/media/File/fosomuxolowunarijo.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/a70af5490cd9b665ca89c33f8a323bd0/22122621215.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/99937362739.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/q7qk5t7omqu5hnn3e58d3g1pp8/vemuleragunejixerixixaxo.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/cj5fs8supm0qht9g9ko4qc5rds/4632302126.pdfIn PDF document text
    • http://mamnonlittlesun.com/upload/files/33862473032.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160838fe65dfa3---marivofivakevagijutul.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/mnoh7fsjhh6pjso1fhc003rea4/kijopuri.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/siuognbv4p3inu4lis08l1863i/65005834979.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/52ohvf05n26unie0mj00uaaca6/didinepedejoxetuwitorutug.pdfIn PDF document text
    • https://delphin-restaurant.com/ckfinder/upload/files/korolaxipudabividepazojuk.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/e361f67d671e501a6ac062dade6fdf09/54392408464.pdfIn PDF document text
    • https://artbynela.com/uploads/file/visafenulesekasuwutexel.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/bgjoe80jhpbi1qnv49dn3dhmm9/24447317528.pdfIn PDF document text

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