Malicious PDF — malware analysis report

Static analysis result for SHA-256 72faa5f08dbb05b2…

MALICIOUS

PDF

99.6 KB Created: 2021-03-13 18:07:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 799c7bb84a97d97c8a3c873542f8b64f SHA-1: b9e49d225b5eff8cabb4f47b0959bd9fdc11c22c SHA-256: 72faa5f08dbb05b27b05c3c2bf48b802735a12d4ab6476942442d58d3ccd8e76
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains heuristics indicating a remote support tool lure, suggesting the document's content is designed to trick the user into installing or running such software. The embedded URL 'https://nipisod.ru/123?utm_term=new+bhojpuri+bhakti+audio+song' is a primary indicator of malicious intent, likely serving as a download or redirection point for a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited 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://nipisod.ru/123?utm_term=new+bhojpuri+bhakti+audio+song PDF link annotation
    • http://bandalet.club/how_to_find_log_on_ti-36x_pro6oydc.pdfIn PDF document text
    • https://cdn.sqhk.co/regavebike/LjhewHJ/teamviewer_quicksupport_ios_bildschirmubertragung.pdfIn PDF document text
    • http://cetapp.xyz/kuwadaxunodusnwd84.pdfIn PDF document text
    • http://free-at.pro/solar_system_facts_nasaogqyy.pdfIn PDF document text
    • http://wbigs.space/introduction_to_statistics_and_data_analysis_5th_editiondwrp6.pdfIn PDF document text
    • http://tells.fun/la_republica_de_platon_libro_4_resumen9cxps.pdfIn PDF document text
    • http://vopagokiniki.mypressonline.com/samsung_bd-p1600_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/zinoliwomi/xiiigIL/22603594485.pdfIn PDF document text
    • https://cdn.sqhk.co/sezepemanu/geWziiU/honda_amaze_colours_2019.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/e25c7ded-5bb2-4a0a-a13f-229fd316e1a5/56769304485.pdfIn PDF document text
    • http://juludiripo.myartsonline.com/troy-bilt_21_self-propelled_mower_190cc_electric_start.pdfIn PDF document text
    • http://zimufoduso.rf.gd/magic_bullet_mini_black_friday.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/94958505185.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/69000874898.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/bio_cladogram_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/density_triangle_worksheet_answers.pdfIn PDF document text
    • http://totefopige.atwebpages.com/boolean_rules_for_simplification.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d91e5784-4a8c-4cf4-9635-74998bafa0ca/dell_optiplex_790_dt_specs.pdfIn PDF document text
    • http://lekirajadu.epizy.com/animals_in_english_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/653e7733-8500-4041-ad0e-15075653b436/short_stories_for_high_school_special_education_students.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eeeb09b2-c6f1-4adb-bf7d-dd1d9e31acd3/30943778255.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/protect_a_worksheet_in_excel_vba.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013c90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C90 5412 bytes
SHA-256: 356c664961ddf6bcc03551c899f8a325ebdff96916d34d8ef5b4a506d17e1862
font_01_sfnt_off00014f01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F01 10840 bytes
SHA-256: 2712fa6aaeef11abc6c63de8fc0c6fe3523cada0f8164d1dcb815e07569d125c
font_02_sfnt_off000173ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173ED 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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