Malicious PDF — malware analysis report

Static analysis result for SHA-256 630e3c62a8395dc1…

MALICIOUS

PDF

40.0 KB Created: 2021-09-04 05:51:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2661372b182fece38b75535578a0cbf9 SHA-1: cd86cb6706e4bf6a7e27bc6ed8af08b3482559fa SHA-256: 630e3c62a8395dc17b3dc8ebf2d9d590499f79cb314f0749f0aa09fef7e6b1c4
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and ML classifiers, exhibiting characteristics of a phishing lure. It contains numerous external links, many pointing to compromised CMS upload directories, suggesting an attempt to redirect users to malicious sites. The document's structure, being image-heavy with minimal text, further supports its use as a deceptive lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8883

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 40 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://chcial.ru/uplcv?utm_term=vistas+ortogr%C3%A1ficas+pdf PDF link annotation
    • http://szao-spb.ru/images/news/file/vatoxisuwoxa.pdfIn PDF document text
    • http://campingwithconvenience.com/files/files/jubejoxuna.pdfIn PDF document text
    • http://tradeweb.es/userfiles/file/niben.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa4c45a51c0---kegubirojegumikadegesese.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608417b1a312f---bibetowopero.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3493749267c8e20a2a44ed588838f19c/45043819125.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc9e958cb8---koguwewimamakowisumu.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/252507413f7b370ed9e096def481b924/fefikagenu.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160837eea23d12---49202972293.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/87ee79935dad4258b737e3b5fe3efb00/59129552456.pdfIn PDF document text
    • http://gitimohammadilakhimpur.org/ckfinder/userfiles/files/begewebeko.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/7dcabf0be84e673f7bbb8269647c25f7/zegan.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/23696ff61a8d071523cb32dd0045a2cb/fuwepitojetum.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160afacce55393---97716514996.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4b21748c6---wojuxujudis.pdfIn PDF document text
    • http://fluidearthconcrete.com/userfiles/file/vibilupukilor.pdfIn PDF document text
    • http://mabifitness.it/userfiles/files/72341795282.pdfIn PDF document text
    • http://longvu.vn/Images_upload/files/54228790383.pdfIn PDF document text

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