Malicious PDF — malware analysis report

Static analysis result for SHA-256 90e940ec505d0977…

MALICIOUS

PDF

47.7 KB Created: 2021-09-27 12:29:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 91deb2b878f50d0a82186e779a1b29a7 SHA-1: c4d7fa88ec471f07fe7f0106905be34b99b8709d SHA-256: 90e940ec505d09777b84bda9889eec85a8bde7436c9b99b34142d6ccafb1737a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. Multiple heuristics indicate the PDF contains numerous links to external websites, some hosted on compromised CMS platforms or disposable domains. The embedded URLs, such as 'https://crysiq.ru/uplcv?utm_term=gta+vice+city+no+root+apk', suggest a lure to download potentially unwanted or malicious software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7250

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://crysiq.ru/uplcv?utm_term=gta+vice+city+no+root+apk PDF link annotation
    • http://wisdomtours.net/upload/file/kadutevu.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16142f4714b2b6---61310579301.pdfIn PDF document text
    • https://kop-trans.pl/uploads/userfiles/files/51366965140.pdfIn PDF document text
    • http://tdbm.vn/upload/files/xalav.pdfIn PDF document text
    • https://angelsforwarriors.org/userfiles/files/99548404281.pdfIn PDF document text
    • http://sunriverps.com/data/editor/file/31045316443.pdfIn PDF document text
    • https://atasuorganiktarim.com/upload/ckfinder/files/1324650044.pdfIn PDF document text
    • http://uniradioweb.info/userfiles/files/patusapepowit.pdfIn PDF document text
    • http://xn--hy1bt45apoap01a.net/jangheung/userfiles/file/11530058349.pdfIn PDF document text
    • https://mobspace.xyz/web/img/podborky/files/70340496803.pdfIn PDF document text
    • http://word.mn/uploads/assets/48884959544.pdfIn PDF document text
    • http://tfe-design.dk/userfiles/file/vipajosavabugodugodaj.pdfIn PDF document text
    • https://nnt52.ru/userfiles/file/pogeperuwotifogugatunum.pdfIn PDF document text
    • https://bbu.vn/Images_upload/files/vibesijuwafama.pdfIn PDF document text
    • http://superfishinglewood.com/uploads/files/fobijiwikonepivol.pdfIn PDF document text
    • http://fotografoenricogiampieri.it/userfiles/files/79154240820.pdfIn PDF document text
    • http://www.ssc-ras.ru/ckfinder/userfiles/files/duferafaji.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16141e79c9ae24---19162516193.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613675df12732---99161802749.pdfIn PDF document text
    • http://medicaldistri.com/ckfinder_files/files/tiguriluvetowemeliluzum.pdfIn PDF document text
    • https://shen-su.eu/gfx/userfiles/files/kesulexafabiretuzunegize.pdfIn PDF document text

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