Malicious PDF — malware analysis report

Static analysis result for SHA-256 66eb94ccdd6c9fa6…

MALICIOUS

PDF

87.9 KB Created: 2021-09-06 20:59:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9fb18fceb3d8a15b6adb6a4874beebe6 SHA-1: e62442f914d909d4e7fb748aed2b681b7547b8f0 SHA-256: 66eb94ccdd6c9fa6ef822d789fb27910cb006ec0a33592b30efcc20a985b975f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to numerous distinct hosts, many of which are associated with compromised WordPress uploads or disposable hosting, indicating a likely phishing or malware distribution scheme. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://4998horo.gmmwireless.com/contents/files/jikisifor.pdf In PDF document text
    • http://dezis.ru/uploads/files/sorawonesux.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/lobokafuja.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16102dca03bd0d---kutomomifogitafiwunafa.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160f0771e4f155---81895412854.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/55a682642687bb3282ddfdc69e639f14/62883667547.pdfIn PDF document text
    • http://lionsmarsala.it/userfiles/files/26651740332.pdfIn PDF document text
    • http://choinka4x4.org/cms/files/file/fomenodutowegulolirowime.pdfIn PDF document text
    • https://coopinproject.eu/ckfinder/userfiles/files/2893538357.pdfIn PDF document text
    • http://nw-line.ru/generic/uploaded/59082999469.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/c1597e63011670b72e853206ae641834/xasevenelubemadogomedotim.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/anbmop76it8o7hdprdvr3d271d/7987999788.pdfIn PDF document text
    • http://alfavs.eu/userfiles/file/20591623701.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d82fe02e3b8---nosiduminojat.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a195c19a1fe---75481198166.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/ea4fd9217b47851670952fd275771e90/muwunotozikowaba.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/tupowawuguxez.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16072682b4aa00---newimebupu.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608a64dceb3e5---34277546110.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609e35de9e6e9---vosifuzixonuw.pdfIn PDF document text
    • http://yngc.ru/admin/ckfinder/userfiles/files/29476346000.pdfIn PDF document text
    • http://fairmonteast1975.com/clients/0/01/014dde3c838f86fef2ac1d31a86c415b/File/vifiwerewilu.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/40946895893.pdfIn PDF document text
    • http://www.psoevalledeabdalajis.es/ckfinder/userfiles/files/dakedibupumirexejifow.pdfIn PDF document text
    • http://graviroz.hu/ckfinder/userfiles/files/3265271502.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=power+of+attorney+philippines+pdfPDF 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_off0000f212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF212 17892 bytes
SHA-256: 42ca2374b177eda58c8acefc013be7a99d1629fecc65fad5309ea5f5dc0d7d70
font_01_sfnt_off00012097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12097 10796 bytes
SHA-256: ef962d9d54337b869b66baa0d462cf5e888c98f6d969503f8d67b20b883064ce
font_02_sfnt_off0001397c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1397C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1