Malicious PDF — malware analysis report

Static analysis result for SHA-256 b058d7085f30d204…

MALICIOUS

PDF

88.5 KB Created: 2021-07-28 13:45:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: c04e1fa8939f2772cd1a6e6d27fb20d6 SHA-1: c7b150d7218ac2b33196ace19f0ac0a791e27582 SHA-256: b058d7085f30d20469079fa89e83a17e7b41e91304a507a261272531cc22e2fb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/3cc5ffaf21bd0813d3dba8efb6a0d3f8/puxazuxiviginuromozaj.pdf In PDF document text
    • https://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/2e75649a109cca0787667e8ffb0e1fbe/77497660630.pdfIn PDF document text
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/81334190050.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/kulad.pdfIn PDF document text
    • https://hiddencliff.kr/FileData/ckfinder/files/20210712_ABCE1CC370AF6DAA.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1607a42dee9e9f---lemimariluvuwilinamoba.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f908a35e21d---73474714655.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e3bb4277294---kinefudiwapokuwevufetezoj.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608f712e8611f---jibotarufakabonutizeni.pdfIn PDF document text
    • https://advertisementnepal.com/ckfinder/userfiles/files/joniliju.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/xixunizikesaginuvaxur.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/4e20b789f4d33055c4418f2898981119/27028033186.pdfIn PDF document text
    • https://sanxuattrucauthangkinh.com/Images_upload/files/82747055610.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/43411771683.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608d345f0e88b---4792274611.pdfIn PDF document text
    • http://kaupa.cz/userfiles/file/redoposozotagufexufuloz.pdfIn PDF document text
    • http://www.niziointerior.pl/upload/file/32147683495.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/4d5e64d4da2f3c88b104ad8eabe346b0/mimuniliko.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/34sgfh0ovkhr12a7nur45krj81/97296018156.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/mitatan.pdfIn PDF document text
    • http://www.humillacionyestrella.org/ckfinder/userfiles/files/88668153978.pdfIn PDF document text
    • http://secureyun.cn/uploadfile/file///2021072121513928.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/fd039819114aeda739d3026768ef8bc8/wibabogodetubikusunikab.pdfIn PDF document text
    • https://irish-setter-zucht.info/ckfinder/userfiles/files/genunanadutenibasabero.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160f7d877b93a2---6354849696.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=o+monge+eo+executivo+pdf+download+completoPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F8 18660 bytes
SHA-256: 0e07baafe816da080ff6e4ea699d8d8b3e6d5da37da10ddaa17d6d3fe44e019a
font_01_sfnt_off000120b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000138c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138C8 11076 bytes
SHA-256: 2fb74ac250392b0156602ef8fddc41cf47d024dc4af03cbedbb0329b152d7a11