Malicious PDF — malware analysis report

Static analysis result for SHA-256 358c8df6d47fc73f…

MALICIOUS

PDF

74.4 KB Created: 2021-06-11 02:56:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 26746aa69a189a17b2f8fc6e08b86d78 SHA-1: c01a9ed0d9cc4e36291f4f7ca533d3accac40e23 SHA-256: 358c8df6d47fc73fe109eff030138ae631b234b8763cd8eda6fadca3edddaa41
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage, suggesting an attempt to redirect users to malicious content. The embedded URL 'https://drafthe.ru/uplcv?utm_term=viswasam+songs+download+starmusiq' further indicates a lure for users searching for specific content, likely to distribute malware or facilitate phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://drafthe.ru/uplcv?utm_term=viswasam+songs+download+starmusiq PDF link annotation
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a734bf05404---jeduj.pdfIn PDF document text
    • http://j1medical.com/uploaded/file/wopada.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/wikaxilifopipiki.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d6aed6c6a---dadipuravavira.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/8f64e9cf721a00d7121dab88b5b0ea8f/vemotexufarujofoxudo.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/58d3251f5272922ad6c0feca0be2558e/fuwesadujugizibexodu.pdfIn PDF document text
    • http://armanetti.com/images/vefidizobidebetobikiw.pdfIn PDF document text
    • https://hiampelectric.com/wp-content/plugins/super-forms/uploads/php/files/56713bfeb729ab103410dcdd353a38c7/72317556647.pdfIn PDF document text
    • https://247christianity.org/fckeditor/userfiles/file/104158340801623360548.pdfIn PDF document text
    • http://fandimnarodaku.cz/upload/file/33433969280.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/28117c38decf21aa8e7344f265b53ce3/95890028108.pdfIn PDF document text
    • http://grandchainfamilyfoundation.org/clients/85333/File/gavakafigulojal.pdfIn PDF document text
    • http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zagigorimiradufazol.pdfIn PDF document text
    • http://dostavkaturov.ru/files/file/pidelaxeja.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606c898ed2ae2---zajovuma.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160bb478edefd6---93496023023.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e63e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63E 5328 bytes
SHA-256: 8f45a46c473be2084b08424e3dfb67f0a2140a90cc426cefdcd61192b6a55404
font_01_sfnt_off0000f84f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84F 10652 bytes
SHA-256: 453b6fa602da49c3c6dc63c5ca956ace121f9db3eedc00e8bbaf376b3686b22c