Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2ea038f5ab48d8c…

MALICIOUS

PDF

72.1 KB Created: 2021-09-25 12:26:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 513552e87a3d4f6ba3e3ffea57e52b14 SHA-1: 82a19b30c638ac14f274e872031a243cac32a423 SHA-256: a2ea038f5ab48d8c109b368625f491400f55ff4fae3f10e918e3112897266098
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which are part of a link farm designed to redirect users to potentially malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to obscure the final destination and host many links on disposable domains. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=raazi+full+movie+download PDF link annotation
    • http://sunriverps.com/data/editor/file/wizolixonililetununewo.pdfIn PDF document text
    • http://jysfh.com/upload_fck/file/2021-9-24/20210924040504673853.pdfIn PDF document text
    • http://laguna.piyawatgroup.com/images/files/zalojirekuzepotopa.pdfIn PDF document text
    • https://stehovani-ostrava.cz/static_pages_files/file/wubomujofosodok.pdfIn PDF document text
    • https://marljivo.hr/userfiles/file/7170010355.pdfIn PDF document text
    • http://kassa.pl/userfiles/file/26066249030.pdfIn PDF document text
    • http://xn--j1aai7d.xn--p1ai/userfiles/file/bokagipiwemaputerapo.pdfIn PDF document text
    • http://studiomontironi.eu/userfiles/files/fugupumaj.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/jugimom.pdfIn PDF document text
    • http://studiodugnani.it/userfiles/files/476553033.pdfIn PDF document text
    • http://sun-tes.ru/files/file/tupibatixasilofekidus.pdfIn PDF document text
    • http://quiltingacademy.net/fckeditor/userfiles/file/vifovekavikorejaguvorawe.pdfIn PDF document text
    • https://bgg.pirkitpadangas.lt/ckfinder/userfiles/files/porofasadigadutujudix.pdfIn PDF document text
    • http://m-camper.ru/ckfinder/userfiles/files/tulejugasiwudafulun.pdfIn PDF document text
    • http://papinchess.ru/userfiles/file/zejukadoduzeso.pdfIn PDF document text
    • https://megalight.lv/uploads/files/47401933178.pdfIn PDF document text
    • http://rts-3.ru/upload/files/23982682229.pdfIn PDF document text
    • https://catbasailing.com/upload/fck/file/wimivoxexatawejumuwirufe.pdfIn PDF document text
    • http://mictrogiang.com/userfiles/files/30926889030.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/fc4rl5sa28dkg6e37878gi89s2/29056320375.pdfIn PDF document text
    • https://asiarsolutions.com/userfiles/file/fonelenoxixiwowora.pdfIn PDF document text
    • http://bandwidth.aryanpalace.com/userfiles/file/70507238277.pdfIn PDF document text
    • http://uleshuzatshop.hu/files/file/75988583821.pdfIn PDF document text
    • http://ipoz.pl/userfiles/file/24169127894.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_off0000b6ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6AC 10508 bytes
SHA-256: e8bc99381f046657bbbbb6becfd8d3618cc41698a272028029a08f7fab62eb53
font_01_sfnt_off0000ce9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE9F 17224 bytes
SHA-256: 8e7f84a936921077444a7dd1c80e6a9fd0b71d61889f72f5d6da70afff40e8c8
font_02_sfnt_off0000fa95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA95 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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