Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8b2fef6855d13cf…

MALICIOUS

PDF

50.4 KB Created: 2021-06-26 21:48:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 94b763fe25fac4a06d80f9c7ec29fead SHA-1: b4fe6f8e492b50a23314280474dbfd0de521ed27 SHA-256: c8b2fef6855d13cfb8ee4874800a5d02bad85f2da676bf43051fe72592430921
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, forming a link farm. The ClamAV detection and ML classifier indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8963

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://drafthe.ru/uplcv?utm_term=flat+bill+hat+with+ear+flaps PDF link annotation
    • http://samtekelektrik.com/files/98506591661.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/c4b6ee49898d535c087a6c18a5d07a5a/tawava.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/0fcf5ba8014725dc34b251a03e6c2c84/50880951722.pdfIn PDF document text
    • http://livinglearningandworking.org/clients/e/e0/e05af8355f71d8da3aa90f500b9284b3/File/tofeviseb.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/d2afe444446e1f692293903cf684139d/23204335769.pdfIn PDF document text
    • http://medicapoland.pl/uploaded/file/nosevepugo.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/58363105831.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/gizofuxexedip.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/wasufi.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/r26uvlgdifdttkcto90q25mkmn/95530547814.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/ec356bc78f4d44e5665cca7f43561cef/relesipavunovivowefoliz.pdfIn PDF document text
    • http://voxel-avocats.fr/uploads/file/mipoxojelovogozadoruri.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a169fbe8ff2---81888788935.pdfIn PDF document text
    • https://uniqrelation.com/userfiles/file/66386592382.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070abc981e83---dexuwunivavavegeboboli.pdfIn PDF document text
    • http://paulsaperstein.com/userfiles/files/jeximedisimepatevufutax.pdfIn PDF document text
    • http://boxethai38.com/upload/file/vasadotafujavatizu.pdfIn PDF document text
    • http://leinerpakgelatine.com/survey/userfiles/files/36668046125.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160838f168942e---71698745202.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082201fcb1c9---bulinafawiwowevi.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/0eef62e39688bf347681e2451aa98019/88080373474.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210506234929.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/53d6c55dd76977294d7f10022ddc9c40/xaduzijaviwemu.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609908d51a309---49060502557.pdfIn PDF document text
    • http://studiomuraca.eu/userfiles/files/80113199208.pdfIn PDF document text

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