Malicious PDF — malware analysis report

Static analysis result for SHA-256 c557942ed1930505…

MALICIOUS

PDF

49.0 KB Created: 2021-06-10 00:37:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7086e8e29b6d7f0a3e907577c846f39e SHA-1: 6378edbf662403b302c86a8167e4d8a1a60961c9 SHA-256: c557942ed19305052cb16167804862e3a89012394dde40683e0e73572e726dd3
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. It functions as a link farm, embedding numerous URLs that point to compromised WordPress uploads and other disposable hosting sites. The purpose appears to be directing users to malicious content hosted on these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7009

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://garglob.ru/uplcv?utm_term=wr3d+19+mod PDF link annotation
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/1f6b0a87eaac7cc33161b03ec2aa33bb/fumoguzowekujunejavena.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/dojidil.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/7fdvuoen6fjggo5oiumvhbeb88/pisigexobibimadowuwov.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a72aeb0864---mewojofazute.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e76ef19c1---52515611046.pdfIn PDF document text
    • https://festival.bg/fckeditorfiles/file/gibafuzabesigud.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/f3c45e982b338bde5626ea5634c6c740/34854146991.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/77109219801.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ecbdac153848739428a7f1ca0285bdc4/18380975936.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2858fbe388---dukugamabobuduvemeba.pdfIn PDF document text
    • http://highlandhighclassof1962.com/clients/c/c3/c330a44b04b080977bf299ea430a317d/File/47632077714.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1335576812---52350609410.pdfIn PDF document text
    • https://flardochform.se/userfiles/file/virimape.pdfIn PDF document text

Related samples 8

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