Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5985b17cbb9a04b…

MALICIOUS

PDF

69.8 KB Created: 2021-10-01 00:06:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 6d75863fe3c510bde62e51bacba85845 SHA-1: 8fb1a1b0c4675703f82763b71d469a1b43577dc8 SHA-256: a5985b17cbb9a04b17b6f553bbf4300fb23c1e646d2226b4f444bef0a3d292d0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. The document contains a link farm pointing to compromised WordPress upload storage, suggesting a phishing or malware distribution attempt. The primary URL, 'https://oniceh.ru/uplcv?utm_term=picsart+exe+download+for+windows+7', indicates a lure for software downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://oniceh.ru/uplcv?utm_term=picsart+exe+download+for+windows+7 PDF link annotation
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130c496eb491---fovukafevebug.pdfIn PDF document text
    • http://01host.ru/userfiles/files/41441573368.pdfIn PDF document text
    • http://www.farnostbobrova.cz/ckfinder/files/liriraloze.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/vobusarasipanisegi.pdfIn PDF document text
    • https://bepxuyenviet.com/upload/files/wavurabof.pdfIn PDF document text
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/bewalegupewurisejaz.pdfIn PDF document text
    • http://voyagevietnamlaos.com/hinhanh/file/91691877316.pdfIn PDF document text
    • http://www.cafeinca.com/img/public/contenido/file/nebabejupateveni.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/5dd891cb13af2aa2f4b6170c482027f2/xetewimevufuburene.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/files/files/47420711721.pdfIn PDF document text
    • https://handinhand-daycare.com/ckfinder/userfiles/files/morimage.pdfIn PDF document text
    • http://cib.lin1.ca/phpsites/vertical_living/uploads/file/bovuvaga.pdfIn PDF document text
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210909105501.pdfIn PDF document text
    • http://telecycling.org/files/file/saxizoxepegebelibodopore.pdfIn PDF document text
    • http://ceramicaartisticamarsalese.it/userfiles/files/3670184392.pdfIn PDF document text
    • https://mimpishio2bet.com/contents/files/98350445183.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148465006496---65118516139.pdfIn PDF document text
    • https://shieldtech.cz/ckfinder/userfiles/files/japorawupepa.pdfIn PDF document text
    • http://sd-admin.fazendapenaazul.com/ckeditor/uploads/files/gisejiwadowufejarox.pdfIn PDF document text
    • https://suthuytinh.com/app/webroot/uploads/files/xoseguvipironudinoga.pdfIn PDF document text
    • http://kerama.altrodesign.eu/ckfinder/userfiles/files/69072255633.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145df6263fb0---67994256372.pdfIn PDF document text
    • http://levne-pohary.cz/UserFiles/File/10705366184.pdfIn PDF document text
    • https://printsolutions.printsolutions.bg/uploads/wysiwyg/files/wifuvudabakoliwatagulon.pdfIn 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://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_off0000b31b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB31B 10708 bytes
SHA-256: 9206edaa3a5db1a7d4dcc1c56ff9fd30cd4944f120d31e1cc855a6111eeddbba
font_01_sfnt_off0000cbf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e40b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE40B 14788 bytes
SHA-256: a5f7e6ea7322c2930acb358691de145eaa350a199da23160252f8b04a2ed0222

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