Malicious PDF — malware analysis report

Static analysis result for SHA-256 304b3389e78676e8…

MALICIOUS

PDF

66.4 KB Created: 2021-09-03 20:05:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2f33a2cfa24d0bf365ab2d4e70cc2afb SHA-1: eb3372e82494bef60807d0527f87911bca1d09ce SHA-256: 304b3389e78676e85cee0eb4a5b962f087a40ba87fa61b6002bc47c1b75a0d8b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, indicating it's likely a phishing or malware distribution attempt. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF structure and embedded URLs are consistent with techniques used to deliver second-stage payloads or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6381

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://laborke.ru/uplcv?utm_term=manual+reloj+citizen+eco+drive+e820 PDF link annotation
    • https://fotokeramika.bg/userfiles/file/logawidonomuwumoduwapowa.pdfIn PDF document text
    • https://hotnewsmd.deca.md/upload/userfiles/files/wewadajemodi.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/uv86vtr2buiukem79s1aa91a21/tajalokawapisixupuvaxo.pdfIn PDF document text
    • http://crmrealty360degree.in/userfiles/file/79404996381.pdfIn PDF document text
    • http://pijntherapie.be/uploads/files/bezugudoliralafaxuxijo.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/81ea5ac1857d13b70c8a8ebd5f559d0c/21599967987.pdfIn PDF document text
    • https://wic-net.com/userfiles/file/ralof.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/rrdiblkgqv0e9775pbtc5ntp9f/tidajopepimekabu.pdfIn PDF document text
    • http://taikenplan.jp/ckfinder/userfiles/files/97124945170.pdfIn PDF document text
    • http://gospelpour100voix.com/fichiers/newsletter/file/94799225961.pdfIn PDF document text
    • https://www.ndgai.com/wp-content/plugins/super-forms/uploads/php/files/i5nleipk1a25ic2v05fm01uo6p/47811815872.pdfIn PDF document text
    • http://conblocmanado.com/pics/file/vunilefara.pdfIn PDF document text
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/845c7a21a6d388a0ad6b2c9c6cba9d03/28540093501.pdfIn PDF document text
    • https://hobbes-group.com/upload/files/38678684155.pdfIn PDF document text
    • http://zeroseistudio.eu/userfiles/files/tuleguw.pdfIn PDF document text
    • http://abaj.cz/UserFiles/File/17276922974.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/ekdvagmqgvfu55gre3g43vtrve/46713674039.pdfIn PDF document text
    • http://atek-ent.com/upload/file/11797837025.pdfIn PDF document text
    • http://abwrichmond.com/uploads/files/27063369049.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8683c04c5---debugujo.pdfIn PDF document text
    • https://gameclub.by/uploads/files/merozozakukizuboji.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/nhbhigt2osgm1en2akik66nddf/18179601044.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5c48caf50---gelolusutixabefof.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f021651e9a8---39260934324.pdfIn PDF document text

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