Malicious PDF — malware analysis report

Static analysis result for SHA-256 30e1ac1574940bea…

MALICIOUS

PDF

57.0 KB Created: 2021-05-28 00:23:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e5dba477c14a35edcbeac3f1ac48535 SHA-1: 5518e1572993f7364bb524e040f5c1c24c6bd30e SHA-256: 30e1ac1574940bea7affe0c29e9e57cb80dd01c85c23bad243910c33730ce276
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links to disposable hosting sites, many of which are compromised WordPress uploads, suggesting a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with techniques used to host and distribute second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9627

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://airshow-bg.com/file/31727064168.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160819fd4af6b4---bolodagusumaloke.pdf
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/bfbb671441b4b6629cc4bde50b981453/mutakosokitupisogawul.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097a3bf0b01b---bilupefavapaxiwaxon.pdf
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608872e22a383---nofadunogexubu.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16082be63408ba---femamasamila.pdf
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//5007116595.pdf
    • http://akinmedikal.com/uploads/file/guxudurotojavo.pdf
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a707f93b9ab---pifuzowerijizunos.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16088c3723a3b6---87395732743.pdf
    • http://tamker.hu/userfiles/file/98416961959.pdf
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/28811d34cc7b2419bf79bcf193b6cd77/mitefubawisodewemometukis.pdf
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083059b2316c---pojuzezewun.pdf
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/3492037bd3b5cf89451196df031c3b3d/95539158187.pdf
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/6727c29c79375b069f6f773bf83a2561/kojuzirunefevemowizanemum.pdf
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/264e3f5bb2a4c0c98f40c7923f09dbe8/vutekepukutonuke.pdf
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/a126776b6ea7124d2b66fa1e0ca0b540/womabupuz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=oru+kalluriyin+kadhai+movie+download
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce6d.bin
a7cc345b5685058051f71e7568bbd15e5025c0896946425fd3f6a6a5c736b6b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE6D 5232 bytes

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