Malicious PDF — malware analysis report

Static analysis result for SHA-256 5efc00d7a09d30d6…

MALICIOUS

PDF

88.8 KB Created: 2021-06-10 07:56:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 34a4ec75f165c74cf34331b97d91ac32 SHA-1: d76ff6f77e802e15d7705b4d6d4e93c9f8a4ca8b SHA-256: 5efc00d7a09d30d6ffa3cd5b9b89554154ee44861f64b5ab62a49c57a4d8fbd6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to distribute malware. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs, such as the one attempting to lure users with a movie download, are the primary indicators of this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8375

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://allytemp.ru/uplcv?utm_term=titanic+full+movie+in+tamil+hd+1080p+free+download PDF link annotation
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/3ohqblpqqct5r9k9ramsehlk87/wenakikokenu.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab764cd887a---dekojo.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/k6sqpb4nbc243k11tlojh3h03h/76976790042.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/gupedakupe.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075464182610---31339650434.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/69913fp12aks8n5qk3qhr8gk15/notujotabifuralotidor.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/tubivawokapororo.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160771705f224f---vuduvivetesonibag.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608975a002159---xulogam.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fa6d4b8838---22946118288.pdfIn PDF document text
    • http://studiotecniconuti.it/userfiles/files/25644973409.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16084af40b21c9---banupujeter.pdfIn PDF document text
    • http://sns.hu/_user/file/83638285937.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16078461f3d2be---3787897751.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/92q3aqlh1c0fdoemgiu39np3uf/jigofofud.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/14bcf1f8610c3663068096205cdcd8df/11529768458.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a69703d8bfa---dufisidusavitagujomete.pdfIn PDF document text
    • http://choinka4x4.org/cms/files/file/4056259789.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14529 5708 bytes
SHA-256: 7738168f476bbad6c68fcfff97753b2957e1da8c2fad4dc7e567291360ed1dad

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