Malicious PDF — malware analysis report

Static analysis result for SHA-256 49a43f67176abddf…

MALICIOUS

PDF

64.0 KB Created: 2021-08-19 18:23:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: c5ed7a4d0be7848e7c41a54c9d993972 SHA-1: 20e492d24099301d69454bc182b3b8b18fc8d464 SHA-256: 49a43f67176abddf6abfd15c92d69ca4e5b53e8c9590960db0407d53a2fcf1bf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of links pointing to other PDF files hosted on various domains, many of which appear to be compromised WordPress sites. This structure is indicative of a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9829

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 http://aire-limpio.com/img/editor/file/vukufapevajefaver.pdf In PDF document text
    • http://robedecreateur.com/img/files/88958619428.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/n3v28dvc660dfa8d5n4fk6c6ge/79468374831.pdfIn PDF document text
    • http://er-trans.com/img/produkty/files/99029939989.pdfIn PDF document text
    • http://closehorses.com/userfiles/file/nexagen.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/88972d45c8285b3599240a02e267ec00/49690546517.pdfIn PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/affc767d715e013bd031666e7c9e16f7/sutufidaxilozapupamazufa.pdfIn PDF document text
    • http://kolkandkolkdesign.com/site/data/ws/files/23153161249.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16088a5f38f0db---97208975258.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161076f1ae794a---55638318975.pdfIn PDF document text
    • http://pappteam.hu/userfiles/file/20262493291.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/mofibutibebesifaw.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a1436d9e6---tibajagekurukazipesefab.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/e97e683322f3ab8909b3c46a24005f25/16962477794.pdfIn PDF document text
    • http://kryotherapie.net/neu/userfiles/file/sufodikap.pdfIn PDF document text
    • https://klcmekatronik.com/ckfinder/userfiles/files/97248125698.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/s7pair6kdubbh8bg973v62bblc/filazejuwigodadudo.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdafd86c24---guderifofefalaze.pdfIn PDF document text
    • http://domario.ru/userfiles/file/mivaxujabamup.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/e5ee8f310a3be4ab29854203e3d4f9b7/xizeteb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=dingbats+between+the+lines+answers+level+14PDF link annotation

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