Malicious PDF — malware analysis report

Static analysis result for SHA-256 c338ab0cc98d30c6…

MALICIOUS

PDF

66.5 KB Created: 2021-08-02 16:28:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 75c473e2fe7f5e5f324e312d5283b5d0 SHA-1: e436b169d972f8e704662f2ffee5f79c9d857a83 SHA-256: c338ab0cc98d30c6e2d5c4e6783a06d3d5b0811d93514a7c6a3c8ea9e3ce913a
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and disposable domains, indicating a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier strongly suggest malicious intent. The document body is heavily obfuscated and unreadable, providing no direct user-facing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8348

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://garglob.ru/uplcv?utm_term=examples+of+writing+goals+and+objectives+for+work PDF link annotation
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/rejunula.pdfIn PDF document text
    • http://exmar.it/foto_fck/file/80349120997.pdfIn PDF document text
    • http://circolonauticofavignana.it/userfiles/files/bobuselorejomola.pdfIn PDF document text
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca3fc062e7---87119049041.pdfIn PDF document text
    • https://tahitotfaluovodak.hu/ckfinder/userfiles/files/84612701874.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160d21f0951d69---26303602279.pdfIn PDF document text
    • http://emeraldcovepartners.com/_data/images/file/27268140847.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16102dd4e6c3de---femijitopog.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607fec9114cfe---45648128801.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7ce79032e---15578147808.pdfIn PDF document text
    • http://sakem.org/userfiles/files/99052316457.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/ae2f2b86d5907d2557676a749279c49f/82727552357.pdfIn PDF document text
    • http://ort168.com/upload//ckeditor/files/poxebivivulirerubo.pdfIn PDF document text
    • https://rcot.org/userfiles/file/42751851168.pdfIn PDF document text
    • http://campbellelectronics.com/uploads/denakaditesumedorovamefod.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/a407e068137d33ec744452f4ea624df4/62356544577.pdfIn PDF document text
    • http://terralindahigh1981.com/clients/866868/File/83207573682.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/e337ac59c19d2c572f68712af92cec52/gixisirapux.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16084326229541---89059690859.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/8sp9dpbjv2s840m9n5iugeqp81/nurudovarejumiweroneli.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/95306216777.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/22boksr5ne6kf9fme4d23accj0/18998043841.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/s1b6k16sev4bue6kmu96dj8ra0/34872994623.pdfIn PDF document text

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