Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fd031ee41854c65…

MALICIOUS

PDF

82.3 KB Created: 2021-06-09 18:22:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b8198bbb72b59736015824127aa25752 SHA-1: fc692283d1eab8cae55a1f0587caa7e707d48950 SHA-256: 9fd031ee41854c6565383ac7d868ea687c03bc693eee6672efeb33de11badf2b
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, appears to contain metadata related to a "Zumba full body workout" lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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=zumba+full+body+workout PDF link annotation
    • https://denizlihorozu.com/resimler/files/3100578088.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/wilowegunesalivojifepuz.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160afd16c420de---40460821195.pdfIn PDF document text
    • https://actorconseil.com/files/file/16557136141.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/lusevomof.pdfIn PDF document text
    • http://cartonwrappingmachine.com/userfiles/file/dixodojinili.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/jirukiguseladixut.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c975354973---39233820064.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/3927d5708d106dff02941f4b9f06345d/tafite.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/995h5bcq0fs7scmin6r590nn29/pogibuwedikerebajowaf.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/sabomilekeboroledopu.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a927b18ab82---nomegidegoxobasej.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081725a9b157---xibutexumavofes.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/dd53b75ea92f8922024a15d83a60885d/2685990322.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160864fa4b9d1f---kavamuv.pdfIn PDF document text
    • https://monyetjoget.com/contents//files/72156810337.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_off00010777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10777 5232 bytes
SHA-256: 249f5be395370a3ea7088ae888c90ee3f095ca6c1090bbdb6fa51cf910a64464
font_01_sfnt_off00011948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11948 10312 bytes
SHA-256: 2be23dbe70bf94d91ecf03772c4f38b911b489dbfef7e89b9a8bc35ea792e87e

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