Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f79e0d264e96edd…

MALICIOUS

PDF

76.2 KB Created: 2021-06-12 15:07:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 56e6d57d93cd8755a295466b5853a092 SHA-1: 0c24e9e17101cd37fccc176c049c41ac8c88219c SHA-256: 7f79e0d264e96edd8244226cb9411ce50369b6bc7e7b6e5ecf58bc29937ce55b
156 Risk Score

Malware Insights

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

This PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. It contains numerous embedded URLs, suggesting a link farm designed to direct users to potentially malicious websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates the use of disposable hosting for these links, further supporting a phishing or malware distribution intent.

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://nomylo.ru/uplcv?utm_term=how+to+unlock+characters+in+wii+mario+kart PDF link annotation
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/86587613608.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16083a3e2e031c---32089206602.pdfIn PDF document text
    • http://cnc-soustruzeni.cz/files/file/wazojesafovipibeso.pdfIn PDF document text
    • http://stellamaris.cz/userfiles/7725986056.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/d1edf18bc46ef0f33ce57ad5d5b47760/nufumaliw.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/13c0b9480071fbf1980a5dfd81050a93/tafinezikikikopuzanija.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/jofogonazozikevu.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4ff9c9c71---61784821600.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/2a8d8e15f5d9d5724f889821b53ddca4/69719902239.pdfIn PDF document text
    • http://srividyaastrology.com/userfiles/file/damasajipusosibenudesek.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160968b7956965---mufumol.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0b35a6abd---11881792417.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/zipukibinuw.pdfIn PDF document text
    • http://gialtour.it/themes/userfiles//files/kubipiforasoxofajevosiwur.pdfIn PDF document text
    • http://charontrade.hu/data/file/24150666351.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_off0000ecde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDE 5156 bytes
SHA-256: 6668d5efa9b5c90dfa8ebfc1ba9c825076d5364664eb4f3ebb374342317a6e5a
font_01_sfnt_off0000fe48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE48 11080 bytes
SHA-256: 736363d68d6883a70f9853f13d690633c8d8b55200eb397d998b4416b219b6cf

Open this report in the interactive analyzer, or submit your own file for analysis.