Malicious PDF — malware analysis report

Static analysis result for SHA-256 f43585e840abfec0…

MALICIOUS

PDF

48.9 KB Created: 2021-06-20 19:00:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 099e4a7bd0542da163fcedcb92cee75c SHA-1: 87c4eedb537307bba0dc456b0877aa5c5429c523 SHA-256: f43585e840abfec04ea942365bff9cec694ad0540e347278249f780a8efeac23
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains. The document body, though heavily obfuscated, suggests a lure related to 'Free premiere pro lower thirds', indicating a likely phishing or malware distribution attempt. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7338

Heuristics 4

  • 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://archism.ru/uplcv?utm_term=free+premiere+pro+lower+thirds PDF link annotation
    • http://esoftland.com/userfiles/file/gonunukixugorumufuwedi.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/10ec63b63ef98ebe608ffec460699ade/42187290950.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b54f68bebed---xodoziwote.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/be338d36e474f0e044ecf278ad74a86a/wijovesekegeneju.pdfIn PDF document text
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/6e0340f9993fafae52d2bb6488f70e2a/bopifiguxatuweputi.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609633c7714f5---50998411427.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/9cc33d8a76fdd8afa4ffec4cdb0efc5e/1737272769.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b098693c5ca---59430253982.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16080240827bd5---17121685713.pdfIn PDF document text
    • https://unosms.us/userfiles/file/90283375316.pdfIn PDF document text
    • https://lesura.net/userfiles/file/kerawe.pdfIn PDF document text
    • http://ellev.fr/upload/files/69463658271.pdfIn PDF document text
    • https://a1-recruitment.fr/v2011/Files/fck_upload/file/52953396652.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/1ab72016608fca8fa32d1f518b8f2fdd/surejuposokan.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/lixitoxowojibakomebi.pdfIn PDF document text
    • https://etonbio.com/newsLetters/images/file/zabexonu.pdfIn PDF document text
    • http://adria-ex.com/68907737361.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/4ofkj53kkfboujccla5urtafq5/vopefexovabapaj.pdfIn PDF document text

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