Malicious PDF — malware analysis report

Static analysis result for SHA-256 f616f17456bcbd33…

MALICIOUS

PDF

56.8 KB Created: 2021-07-05 05:45:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d8dbe4ffcb7cc6e3141ba62eb9024e5c SHA-1: 62a21908045bbc7ee3f4fbb05374da07686dfce2 SHA-256: f616f17456bcbd333e1736d54ff204d77f4689233749840476bfa934ec3eb958
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the overall structure points to a malicious PDF used for initial access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5388

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://pistant.ru/uplcv?utm_term=average+end+game PDF link annotation
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094db3216990---tebewapa.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/55036435542.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/ead25b2c8b3bdd5935076898321ce4aa/likenoditinoj.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d6aaadae0a---76186061397.pdfIn PDF document text
    • https://niboparis.com/upload/fckeditor/files/vepezipura.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/aa0440e2d3a23024310830bfa27d7d9b/77403211765.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4f20ee2839---83921580030.pdfIn PDF document text
    • http://baaningdoi.com/file_media/file_image/file/91725765624.pdfIn PDF document text
    • http://7onseventh.org/clients/868256/File/66968529522.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bafce9accf6---87212550935.pdfIn PDF document text
    • https://monyetmesum.com/contents//files/79911759497.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607864c1d95c0---47399617023.pdfIn PDF document text
    • http://chieusangducphat.com/uploads/userfiles/file/4947052071.pdfIn PDF document text
    • http://22743333.com/userfiles/files/9352564754.pdfIn PDF document text
    • http://thanhlapcongtykiengiang.com/upload/ck/files/78901105465.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d209d222209---63792370587.pdfIn PDF document text
    • http://pantipplaza.com/userfiles/file/89046288854.pdfIn PDF document text
    • http://yaeram.com/userData/board/file/sofupizeg.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160861f436b23d---65498411310.pdfIn PDF document text
    • http://irinaburmistrova.ru/files/86885507139.pdfIn PDF document text
    • http://quanhoangtsi.com/upload/quangtri/files/25732835370.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/gsncfl9noakvqcu1e0qemvs93c/jodukuzufimuxisepof.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/26efeb3b65fbaa9c81d138a65900ae47/kerupuxi.pdfIn PDF document text
    • https://deepex.hu/hirek/files/dafadawazikomokimuwawaxek.pdfIn PDF document text

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