Malicious PDF — malware analysis report

Static analysis result for SHA-256 40dd389f8023ddfe…

MALICIOUS

PDF

70.8 KB Created: 2021-03-04 11:01:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ee9fce1cbf363f51a09c323c1a6e59d4 SHA-1: 9e2f5035871718ecf64d7a661be57615c47a8d8f SHA-256: 40dd389f8023ddfe373bb8feb082714653be696bf77f9bb470264cf09d76014a
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains an embedded URI pointing to a suspicious domain, 'jottigo.ru', which is likely used to host a phishing page or a second-stage payload. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the malicious URL strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/strik?utm_term=d+and+d+auto+clinic PDF link annotation
    • https://cdn.sqhk.co/xolofiwano/igigehj/92854050837.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/gcJjdhh/destiny_child_mobile_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/vemikozoj/Tktclkm/microsoft_bookings_app_api.pdfIn PDF document text
    • https://cdn.sqhk.co/nifodotiriru/uhbib9V/whispering_oaks_apartments_portsmouth_va_23707.pdfIn PDF document text
    • https://cdn.sqhk.co/fejisedetu/cifhbEn/claw_machine_real_prizes_app.pdfIn PDF document text
    • https://cdn.sqhk.co/jiwosowo/eigAQdN/xumonimopojamibo.pdfIn PDF document text
    • https://cdn.sqhk.co/lazemowul/jiHYjdH/italian_music_songs_download_tamil.pdfIn PDF document text
    • http://xuvaxujogilo.mygamesonline.org/99244871150.pdfIn PDF document text
    • https://cdn.sqhk.co/rejoxapuzopa/VAjjije/u_mobile_prepaid_top_up_validity.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/bugutaj/how_to_get_a_chick_fil_a_scholarship.pdfIn PDF document text
    • http://zewuvumanoxulo.rf.gd/gijusinifuxenojegafowiwov.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/angular_mat-_checkbox_reactive_form.pdfIn PDF document text
    • http://feliruxitekul.epizy.com/nudak.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/41203440491.pdfIn PDF document text
    • http://vetuvadoxawiton.epizy.com/north_iceland_tourist_guide.pdfIn PDF document text
    • http://delupujak.epizy.com/define_bacterial_transformation_and_discuss_how_studies.pdfIn PDF document text
    • https://s3.amazonaws.com/moduluzuxikari/bijikovir.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD997 4660 bytes
SHA-256: a0dd290c3f44a1e5425478d6569dc1c329789234041a042683cd133947024e8e
font_01_sfnt_off0000e986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE986 11192 bytes
SHA-256: 1f6b8b64f1c6c41fc48f781e0aa2331f44407fec82b68cb53fd7b073283a9809

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