Malicious PDF — malware analysis report

Static analysis result for SHA-256 492e8fe58fbd3423…

MALICIOUS

PDF

102.9 KB Created: 2021-03-17 21:43:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: abeb48094774ff1877d0f678a72087a9 SHA-1: da584abd2cfc8ba0f657235a772a5b78d74dad7e SHA-256: 492e8fe58fbd34235f40cbd418a6d86af36c0eda3a0a552f77fe6c9778caf034
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'soxebez.ru', which is likely the primary malicious destination. The document body, though truncated and obfuscated, appears to be a lure related to medical recovery, suggesting a phishing or social engineering attack.

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://soxebez.ru/strik?utm_term=ejercicios+para+despues+de+una+trombosis+venosa+profunda PDF link annotation
    • http://italywow.pro/760079382454cp3u.pdfIn PDF document text
    • http://wogapunise.iblogger.org/navy_leave_policy_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/jijatidos/hehjsXt/86061255329.pdfIn PDF document text
    • https://cdn.sqhk.co/mabisurud/VeighiO/90967033483.pdfIn PDF document text
    • http://de-bewertung-id-q2e5t23.top/is_dog_lucky_in_2020dh69m.pdfIn PDF document text
    • https://cdn.sqhk.co/fasegibuniz/A2jdnM5/impossible_test_christmas_answers_catch_the_elf.pdfIn PDF document text
    • http://liketime.online/30194399887g1hal.pdfIn PDF document text
    • http://sadovik.me/xujepovub0e8bu.pdfIn PDF document text
    • http://mists.space/18450520780udqa9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c56fd747-c6c0-480f-9330-ab9900ad1398/most_popular_behavioral_interview_questions_and_answers.pdfIn PDF document text
    • http://sifebina.epizy.com/picsart_premium_apk_9._40._0_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26b217cb-6a4e-4acb-a314-4cef7febe941/how_often_should_i_change_my_honda_civic_transmission_fluid.pdfIn PDF document text
    • http://dunogulazemetus.epizy.com/how_to_get_directv_remote_to_work_on_roku_tv.pdfIn PDF document text
    • http://rexawisoza.epizy.com/android_camera_eye_tracking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57252763-23d0-4181-8ac3-80052d0bba24/how_do_i_adjust_the_volume_on_my_acer_monitor.pdfIn PDF document text
    • http://riberudedanute.epizy.com/jakiwonapadatubes.pdfIn PDF document text
    • http://fiwiduropewoxo.rf.gd/makalah_anoreksia_nervosa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/651cd3f8-6bc3-40b2-934d-934c8a533624/15468053119.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_off0001514a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1514A 5500 bytes
SHA-256: 8179967b6e5a32e045ce98b71dd24fd0b9fa0d9bcc1f4e0af754df7f1d0cfc01
font_01_sfnt_off000163f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163F7 13172 bytes
SHA-256: 4a179a650d2d0ed0f41a1f1298f76afb248746bba053168003e88855ecada9d5

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