Malicious PDF — malware analysis report

Static analysis result for SHA-256 eab79824b502c010…

MALICIOUS

PDF

56.0 KB Created: 2021-06-07 00:16:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7715f04c782703c755a6781a224233ec SHA-1: 5a3571a055a1bb037404e88566b0dfd5e00ddfab SHA-256: eab79824b502c010ba7edffb63b8ba5c0c2c14da3075d18a84266e2467d0af17
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 links to external websites, many hosted on compromised WordPress sites, suggesting a phishing or malware distribution campaign. The document body, though heavily obfuscated, appears to be a lure related to 'Gerund englisch 8.klasse gymnasium �bungen pdf'. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7497

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://wastran.ru/uplcv?utm_term=gerund+englisch+8.klasse+gymnasium+%25C3%25BCbungen+pdf PDF link annotation
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/t7tk8ecih1fil5tu6eesqu31ar/40882517247.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160989a87e4b47---10547065990.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/df2602366e73e83b4f3c6158993e4fa7/sekujisagasobifopobiwojus.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/jec6a8aai9djb4fhhltset6c5v/34011454688.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/ecc5abb24f8aca0245b664f23ac7351f/12044519459.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/e91574948b0b59a87534b15eef435ea2/74873682592.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/75873246658.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/92uatev4sl8tfed1733kqfpgf2/papixamulakazepiga.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f69e3bf1e---kalezikixupokimuxusoj.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cf008c974b---xiwizesugexodedawariru.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/b1486615d67eca8c119210b1c4688b72/63004750844.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077458d02ae1---51713334011.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/mrd0osh6j68r5qblksvfkt59b6/66913553431.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/9c355453102031a77959428db26ea07f/89722997666.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160acf8fcc83d8---deduxetugatowafididoso.pdfIn PDF document text
    • http://kurskodkb.ru/page_edit/_samples/userfiles/files/90981397196.pdfIn PDF document text
    • http://cnhhgj.com/upfiles/userfiles/file/paxida.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/63609602655292b845fac54fa66fbfb7/wadamefib.pdfIn PDF document text

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