Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2dbd06b96167f68…

MALICIOUS

PDF

82.5 KB Created: 2021-03-15 18:08:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 9494dcfa58f76fbc5bf800122dd13a5d SHA-1: 3d421d84ca40c7e37909e6ed9e6db74db3cb1e16 SHA-256: e2dbd06b96167f689e4f4f2d022f62bec6b26520bbbf3f4f0ac66ea8f6c61783
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body, though heavily obfuscated, contains keywords related to computer shop security, suggesting a lure to trick users into visiting these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/award?keyword=bantay+ng+computer+shop+complete+pdf PDF link annotation
    • http://presentinsta.site/vocabulaire_progressif_du_franC3A7ais_des_affairesq3ev6.pdfIn PDF document text
    • http://vkrowl.com/notes_from_a_small_islandkjdkh.pdfIn PDF document text
    • https://cdn.sqhk.co/jagibuvat/aicjgnD/55433665722.pdfIn PDF document text
    • http://luminar4-download.xyz/veganismo_en_mexicoqmufx.pdfIn PDF document text
    • http://ultra0.space/solidworks_2020_tutorial_planchardlxw5f.pdfIn PDF document text
    • https://cdn.sqhk.co/firijanab/ihdiihh/truck_upgrades_calgary.pdfIn PDF document text
    • https://cdn.sqhk.co/givujelised/VpgdShd/bullet_force_hack_download_android.pdfIn PDF document text
    • http://zoosalon.org/colegio_profesional_de_enfermeria_valladolidgfvaq.pdfIn PDF document text
    • http://libertinemodels.com/29071998967bdpeo.pdfIn PDF document text
    • http://weinmvc.net/body_parts_preschool_worksheetogs06.pdfIn PDF document text
    • http://alteramaks.world/h_k_letter_whatsapp_status_video30k4v.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdfb6f36-dde2-4af5-b3b7-55ff39976061.filesusr.com/ugd/c6ac46_140c62ea35524291bd31916dd37fc9cd.pdf?index=trueIn PDF document text
    • https://2e8e3215-33bf-4fe1-bc67-b38dac560527.filesusr.com/ugd/269bb8_1ace96813de9490286fd5b0f36adf888.pdf?index=trueIn PDF document text
    • https://254b3b0b-79dc-4992-827c-fd4bb3db3178.filesusr.com/ugd/f515ca_a601d5277b2a4a0c80fd12cfe1f9d221.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sinadi/91839649337.pdfIn PDF document text
    • https://54179944-c6a3-49b3-9462-5d1939b6aff2.filesusr.com/ugd/49f5ef_417f85a3b55445dd82375689b5177ad5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/petubapizo/status_asthmaticus_management_nice_guidelines.pdfIn PDF document text
    • http://ralupuwegilad.rf.gd/e9_error_on_accu_chek_performa.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/88426923636.pdfIn PDF document text
    • http://tovegini.epizy.com/vamokez.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10343 5720 bytes
SHA-256: 6311175af94c15923e662d3dede33fe45a292dce28c57abc337d6bed092b8ddd
font_01_sfnt_off0001169c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1169C 11228 bytes
SHA-256: 3274c8d2258ee72601c34e49a601385a5a842e208c0a02f0689d6e9aebdeeb4d

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