Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c96e687a6b0a213…

MALICIOUS

PDF

72.3 KB Created: 2021-05-13 14:58:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d785f33953308349ee90b5f3c8696fe4 SHA-1: 986440c83c3cf8f0ed7ce80cc13db3f5e9953f65 SHA-256: 0c96e687a6b0a213f26828c7cb9e05664c8303734cda562dd8bb003ceb7ea898
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'vilenefex.ru', which is likely the malicious destination. The document body, though heavily obfuscated, suggests a lure related to a 'Screwtape letters study guide'. No scripts were extracted, but the presence of an external URI and the ML/ClamAV detections strongly indicate a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://vilenefex.ru/strik?utm_term=screwtape+letters+study+guide
    • https://cdn.sqhk.co/sevigexew/jhjhgu6/moto_racer_15th_anniversary_apk_full.pdf
    • http://godotobekof.scienceontheweb.net/6124029529.pdf
    • http://rebezun.mygamesonline.org/zijawimigi.pdf
    • http://zagodutaf.getenjoyment.net/generic_apartment_rental_application.pdf
    • https://cdn.sqhk.co/vavewiminiv/VGvid7D/teddi_mellencamp_baby_shower_date.pdf
    • https://cdn.sqhk.co/kulobibab/xieIghv/kuniduvogutipebomeb.pdf
    • http://moxokivotalunuz.iblogger.org/rozafubibupemonukenibum.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zuxime/38965814169.pdf
    • https://s3.amazonaws.com/xasovewipeje/mukejerejiru.pdf
    • https://34e223d5-b18a-4f89-96b3-7c58aa965d90.filesusr.com/ugd/440e29_a7ea40b10202420291c7a08377620acb.pdf?index=true
    • http://roxeruteruda.epizy.com/eclipse_for_mac_java_8.pdf
    • http://jefitanebigovun.rf.gd/basic_english_test_paper.pdf
    • https://4edd92ed-4e96-4c3d-a837-a16c7246ae9e.filesusr.com/ugd/7c3149_43479c39865e4f91ac30077a79bd1cfb.pdf?index=true
    • https://7f03322d-63d6-449b-a8c2-a80beffeb2b6.filesusr.com/ugd/2994dd_faa83b7ea0ad425f8199e8398150d5b1.pdf?index=true
    • http://lozadubevapoke.epizy.com/vejajuzatisedo.pdf
    • http://pigasupozev.epizy.com/10364120920.pdf
    • http://zirofasorajama.epizy.com/biralubu.pdf
    • https://a0a5ada1-270c-452f-b092-d943fc6f0dc0.filesusr.com/ugd/306762_d144eca5bfa94beb891062743171c595.pdf?index=true
    • https://d3826037-6016-486c-99e9-dc41bc666644.filesusr.com/ugd/b81754_4916bc6fe0cc496081a85fed48aa4534.pdf?index=true
    • https://s3.amazonaws.com/forupokisip/97519946595.pdf
    • http://jubenopapu.epizy.com/anatomy_4_sculptors.pdf
    • https://s3.amazonaws.com/kisimujuk/vigunagazeruvija.pdf
    • http://dejotiwamur.epizy.com/1996_charkhi_dadri_mid-_air_collision_report.pdf
    • http://bosirizowu.rf.gd/code_d_hammurabi.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_off0000dd18.bin
d0798d8d89bff8719014cf8fc164062628831fce5e74a7e544535d4a29d6cfc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD18 5540 bytes
font_01_sfnt_off0000f018.bin
1bd3ccfed20e37914e94f31f3147ff92d6cef6772d4d7f3487f3231b7c86164d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF018 10052 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.