Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6cdbdad781f1e97…

MALICIOUS

PDF

86.0 KB Created: 2021-03-19 13:11:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 897f092c5f2fcdd4986f8245a7b29c60 SHA-1: 25acb95bb7194012e3cb54a6813da6592aacd691 SHA-256: c6cdbdad781f1e9710f549635e76dacb76ea25c2b9d723912b15e05a8abf34cc
136 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'lozipotod.ru' suggests an attempt to redirect the user to a potentially harmful site. While no scripts were explicitly extracted, the 'SE_LOLBIN_RUN_COMMAND' heuristic and the embedded URL indicate the document is designed to execute commands or lead the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://lozipotod.ru/wix?keyword=curley%2527s+wife+american+dream+essay
    • http://vegofejolafud.mygamesonline.org/efectos_adversos_de_las_benzodiazepinas.pdf
    • https://cdn-cms.f-static.net/uploads/4389585/normal_601ef0b738b21.pdf
    • http://pifafuvutote.iblogger.org/debawefitinufigetizoda.pdf
    • http://jejarit.iblogger.org/program_evaluation_report_outline.pdf
    • https://static.s123-cdn-static.com/uploads/4414357/normal_5fe52f279148e.pdf
    • https://static.s123-cdn-static.com/uploads/4459034/normal_5fdf46d4d1f26.pdf
    • http://kitixukizogutik.mygamesonline.org/esv_single_column_journaling_bible_large_print_bonded_leather_mocha.pdf
    • http://ruvagusowi.22web.org/joyetech_evic_vt_change_coil.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f3c60c18-d1f0-4d31-aa20-a39a4ec3310d/how_to_replace_battery_in_kindle_fire_hd_10.pdf
    • https://uploads.strikinglycdn.com/files/a41381cc-9a59-42da-b5bb-6a10d5482ab3/que_es_valor_actual_en_matematica_financiera.pdf
    • http://xorewabamav.epizy.com/98553575813.pdf
    • http://karifopiti.epizy.com/wexisubetemixejeg.pdf
    • http://mujubelajuzuj.rf.gd/62549242517.pdf
    • http://logasexa.epizy.com/free_ms_powerpoint_timeline_template.pdf
    • http://pamixawikisif.epizy.com/wopuletonatiwowusu.pdf
    • http://xipumipofamas.rf.gd/woxibakalazizinijibus.pdf
    • https://uploads.strikinglycdn.com/files/f8aee54e-d980-40e5-af80-674b2a5b3497/57385317164.pdf
    • http://dupetomumipur.rf.gd/how_to_start_a_bread_bakery_business_in_nigeria.pdf
    • https://uploads.strikinglycdn.com/files/ced294b8-439d-4526-8df0-df3ab17be16e/how_to_program_jumbo_universal_remote_to_tv.pdf
    • http://tupesom.atwebpages.com/business_intelligence_roadmap_book.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_off0001115a.bin
5a0cf4dcbd89295281fb95697e8a9d016ca9052340923e2339dbe33517c15e86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1115A 5300 bytes
font_01_sfnt_off00012364.bin
9556af96c26eaf722bf08b2f79ce114f14aea90988aacd70e2f26a05a8385876		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12364 11548 bytes

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