Malicious PDF — malware analysis report

Static analysis result for SHA-256 4989f8beebbd6526…

MALICIOUS

PDF

59.4 KB Created: 2021-09-06 01:25:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1b4fae5c30bfe3d65af80a33f2f96d3a SHA-1: 8643b82b27f3cc04ad77c91c7f391193f38ea9e6 SHA-256: 4989f8beebbd6526fba12f2aa24fe41b4fc556f78aad756f8305a6237a8381d0
154 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to potentially compromised websites or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farm characteristics strongly supports a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6909

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=sql+tutorial+free+download+pdf PDF link annotation
    • http://artstudiodesign.it/userfiles/files/tinorovipidexo.pdfIn PDF document text
    • https://wagaskar.com/media/1544781009.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612bc27927e6f---sigeropevudusemuxog.pdfIn PDF document text
    • https://le27.fr/docs/file/vufenalokusu.pdfIn PDF document text
    • http://bronia.org/userfiles/file/memozewikinigowur.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1606f44cd84a6e---36127205227.pdfIn PDF document text
    • https://wisserarm.nl/app/webroot/files/userfiles/files/pudabejak.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160915b3f29bbf---86237189263.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c1475268f---vipofedujaruf.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160d9aed6a1365---lejufupotunekode.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210628213847071.pdfIn PDF document text
    • http://ellissi.org/userfiles/files/76654661601.pdfIn PDF document text
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160800bc069ede---19268118516.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/1624bdcaeb817b41a30c5bd0a724163f/62137648507.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607416a32ea5a---teduvanope.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609644e3a6d72---ravuvezuvamulewinekizis.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/35152353590.pdfIn PDF document text
    • https://salubrismd.com/wp-content/plugins/super-forms/uploads/php/files/1172eb1bcd2b8125c26387d3cf483b52/tufurubasafezijukum.pdfIn PDF document text
    • http://biemmecommerciale.eu/userfiles/files/fafulip.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b2f3c8177fd---juriruzozimezikanuf.pdfIn PDF document text
    • https://schilderlesvakantie.nl/ckfinder/userfiles/files/29958590716.pdfIn PDF document text

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