Malicious PDF — malware analysis report

Static analysis result for SHA-256 39928218329fff4c…

MALICIOUS

PDF

82.4 KB Created: 2021-05-09 06:02:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d2f713a81d2e3b01b07588994cbaf18 SHA-1: 91e387decc8ee853c3e060115f5d3a8092029c59 SHA-256: 39928218329fff4c02bf41f00b694b8ceecb70646344fe631342e9188659703b
116 Risk Score

Malware Insights

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

The sample is a PDF document that impersonates a cloud document lure, aiming to trick the user into clicking an embedded link. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL points to a suspicious domain, likely serving as a phishing or malware distribution point.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://zajinet.ru/strik?utm_term=what+is+cloud+storage+in+simple+terms
    • https://cdn.sqhk.co/mejomusajob/hm3jb08/repicvid_free_photo_recovery_software_restore_deleted_photos.pdf
    • https://cdn.sqhk.co/pometobab/ugdidgi/basler_ace_camera_link_manual.pdf
    • http://blognews.top/calendario_escolar_2020_a_2021_sep_hidalgogtd88.pdf
    • http://niwopofe.scienceontheweb.net/45713731246.pdf
    • https://cdn.sqhk.co/fugutexifi/ajhOYmE/baliterakavafomubejome.pdf
    • https://cdn.sqhk.co/nugizape/ebhei2a/billie_eilish_instagram_photo_666.pdf
    • http://raxejudesezix.scienceontheweb.net/what_is_transfer_of_heat_class_7.pdf
    • http://doucheop.xyz/78406907746zg0ms.pdf
    • https://cdn.sqhk.co/vikimono/Fgilscr/kexetidetokojaget.pdf
    • http://noksipals.online/geological_time_scale_of_earthjjm17.pdf
    • http://summ-green.fun/tegawedufofifu6z6a7.pdf
    • http://jikusofare.mywebcommunity.org/kenneth_cole_watch.pdf
    • http://kemedejovon.getenjoyment.net/7_c_of_effective_business_communication.pdf
    • http://all-system7.xyz/57927665798f3ep1.pdf
    • https://cdn.sqhk.co/jaselavujuwi/ynhcghw/6354706329.pdf
    • http://update-win20.online/8046115663451vc6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/donake/descargar_antivirus_avg_gratis_para_android.pdf
    • https://s3.amazonaws.com/wazagidonux/avermedia_capture_card_software.pdf
    • https://s3.amazonaws.com/petuzutemixuvod/maths_worksheets_for_grade_4.pdf
    • http://gumomexad.onlinewebshop.net/abbyy_transformer_with_crack_free_download.pdf
    • https://s3.amazonaws.com/paropabaru/toyota_avensis_2002_service_manual.pdf
    • https://s3.amazonaws.com/sinamozagemoger/cell_biology_research_paper.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103e5.bin
12cfdc773c50192e7ff824ef576baab301dcecf9408f164561263d825114a9bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103E5 5500 bytes
font_01_sfnt_off00011674.bin
e654c57bd143ef19732ced1c237c908fff980253650ee597574cdfe6666b7ffa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11674 10952 bytes

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