Malicious PDF — malware analysis report

Static analysis result for SHA-256 2343b6d8c3740e16…

MALICIOUS

PDF

101.9 KB Created: 2021-05-24 03:24:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c6b6c9b4081bc0c542277c05794bdf74 SHA-1: 57938d78ae42ae83d63dc8b501a54d08c33f615f SHA-256: 2343b6d8c3740e1637d7220bd6577ffb9ffda2828715d7fa397a30a330e73d1b
136 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a security-bypass lure. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://seumenha.ru/strik?utm_term=how+to+exploit+in+prison+life+2021 PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/vapebizesovetesoxozemanem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1747980b-3435-4489-ae59-9556351992a4/jiwalixibimojarori.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/why_is_my_printer_leaking_ink.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c4b4408-6165-42d3-8e52-fcc9645b9ab3/kazifutusepegodak.pdfIn PDF document text
    • https://s3.amazonaws.com/zowibatev/star_sports_football_live_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a668cde-5b99-49cd-837f-cce29d904beb/kirkland_applewood_smoked_ham_cooking_instructions_with_glaze.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/consumer_reporting_agency_credit_score.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/free_elementor_block_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/76521712423.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df462bf5-9ffb-47fd-a91c-3ff0b09ef258/pazozomuro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c1da6fc-9962-4450-a123-a543fc5e148a/zozojuwupasekepapo.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/resumen_de_un_grito_desesperado_capitulo_11.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/isbar_handover_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19108489-c7a8-4b75-b0fe-9366432fd9ef/joduxozebinefimikepoma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbc4b878-5e80-4a95-993b-574f07243f33/jumping_over_the_broom_origin.pdfIn PDF document text
    • https://s3.amazonaws.com/fekife/dias_festivos_2020_ley_federal_del_trabajo_mexico_dof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/136d8996-b641-4d79-9cbf-153dda627dd4/how_to_move_a_window_with_keyboard_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/gegejebemineginulebelin.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/easy_stone_soup_recipe_for_classroom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/613aa20e-34b6-44bb-9780-0b0aff2db3b9/zidaxapi.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/dapebibir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/707bcf28-03d4-489c-80d7-90f988fd509d/22399695401.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
    • 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_off00013826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13826 5132 bytes
SHA-256: 278bd747f651a3f14fb9e8bebb158dc19f3d11025e082924532f6ec0be3781ca
font_01_sfnt_off000149ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149CA 13200 bytes
SHA-256: 3693fb87f72b5bb563ca147d4721463245422dd253805cdc84d56219b6eeaa89
font_02_sfnt_off000174b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174B6 16180 bytes
SHA-256: 3b7f51f2a8a3d7a99fca661331bb0122e32b55677e585b996af61267a5bd7325