Malicious PDF — malware analysis report

Static analysis result for SHA-256 92ea798040ec2ecc…

MALICIOUS

PDF

85.3 KB Created: 2021-04-05 02:56:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a4245db9b5fd1a61ef0c5aa6fe0e292e SHA-1: e1faecb9413994c4459e9e014cb66223f512a4a3 SHA-256: 92ea798040ec2ecc2e57fa9cdd698bd75efc72203c65470f40cbb6ea51ce9b1e
136 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The embedded URL and document body suggest a lure for downloading a fake user manual, which likely leads to a malicious payload. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates that the document may be instructing the user to open a password-protected archive, a common tactic to bypass gateway scanning.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://pelibifir.ru/award?keyword=manual+usuario+chevrolet+captiva+2020+pdf PDF link annotation
    • http://repair-kvadrokopterov.ru/53165740657gfg5s.pdfIn PDF document text
    • http://nerroba.info/travels_with_charley_truck_camper5e99o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408719/normal_6043ff2e1f545.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401982/normal_60514c7672176.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/rulamukikefigade.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/tor_browser_android_app.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/what_can_i_use_graph_databases_for.pdfIn PDF document text
    • http://gimolarevakisav.rf.gd/descargar_la_biblia_en_audio_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/tamil_hollywood_animals_full_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5b09ecd-16ae-45b7-ac31-6f1b70a5781b/81815497491.pdfIn PDF document text
    • http://xojazexodiwosi.epizy.com/is_pollo_loco_chicken_keto_friendly.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/hungry_shark_evolution_all_sharks_unlocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e620a667-934f-46be-a77d-6d9c66b527ed/troy_bilt_briggs_and_stratton_675_series_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/what_is_the_best_knitting_machine_on_the_market.pdfIn PDF document text
    • http://jisixapuwalim.epizy.com/76758463513.pdfIn PDF document text
    • http://tipujujidudig.rf.gd/what_happened_to_juliane_koepcke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2324a67-16c5-42e8-9050-2bb90012ba10/net_c_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/3_states_of_matter_worksheets_for_kindergarten.pdfIn PDF document text
    • http://filazit.epizy.com/alejandra_stamateas_libros_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/transunion_get_credit_report_online.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/suvesa.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_off000102a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A9 5584 bytes
SHA-256: 103706bc76c067c50cd7aac0f35b2d03b7e2942d27126bdc557c10c9d02388b9
font_01_sfnt_off000115ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115AC 1944 bytes
SHA-256: 8e3fba4b71822b964bb664ad471de509dc251d1870d2ccb94004e27eddcf5cc7
font_02_sfnt_off00011efb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EFB 12280 bytes
SHA-256: bb8f98744b7bbc00bcb29787dcc249947be599ae9cec0f4172a0b1f434a4b765

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