Malicious PDF — malware analysis report

Static analysis result for SHA-256 31c70effc6eb7621…

MALICIOUS

PDF

77.9 KB Created: 2021-03-13 14:11:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a99e5e9cd8dc5f6343d636f79e2ca14e SHA-1: ec50af2457520e9f889d6003449298735501e95a SHA-256: 31c70effc6eb7621e31af7c4d7c40c40b1f5f9feaa9d2686db1dd226da379b1e
96 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 'https://seumenha.ru/wix?keyword=boxing+star+apk+offline', which is highly suspicious. Although no scripts were explicitly extracted, the PDF structure and the presence of an external URI strongly suggest an attempt to redirect the user to a malicious site for further compromise.

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://seumenha.ru/wix?keyword=boxing+star+apk+offline
    • http://riragukigud.scienceontheweb.net/ledujipo.pdf
    • http://bamovewube.22web.org/dvc6200_quick_start_guide.pdf
    • http://netopodimamo.mywebcommunity.org/kumisufumisa.pdf
    • http://retenenu.iblogger.org/vedic_astrology_free_books.pdf
    • http://fesotisifofil.mygamesonline.org/how_to_do_silver_glitter_eye_makeup.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gokegufokefewev.rf.gd/factors_affecting_employee_absenteeism.pdf
    • https://uploads.strikinglycdn.com/files/492adab9-d674-4a90-bf24-ec556568b71b/chartreuse_color_psychology.pdf
    • https://uploads.strikinglycdn.com/files/039d205b-4e94-4ba5-acf2-c9e489435449/22241812413.pdf
    • http://bezukovopobav.epizy.com/ali_g_indahouse_full_movie.pdf
    • https://s3.amazonaws.com/vavale/64548632268.pdf
    • http://lununobasafino.rf.gd/how_to_save_latex_as.pdf
    • https://s3.amazonaws.com/suximawo/bejagefafe.pdf
    • https://s3.amazonaws.com/lodazojamuva/angelic_symbols.pdf
    • http://vojapulipono.epizy.com/can_you_get_rock_band_for_xbox_one.pdf
    • http://dasamixatile.epizy.com/vavafokepadunuwuxe.pdf
    • https://uploads.strikinglycdn.com/files/580f81c6-d0b2-45d1-be57-d69dac055975/exporting_keynote_to_powerpoint_problems.pdf
    • https://uploads.strikinglycdn.com/files/f9b5ebf2-3cb3-4282-ab61-0ff6be826ec3/jurojeke.pdf
    • https://s3.amazonaws.com/wezukep/6708691400.pdf
    • http://xewaxal.epizy.com/diaspora_pronunciation_guide.pdf
    • https://s3.amazonaws.com/fuwenoxuzasila/atomic_habits_audiobook_resources.pdf
    • https://s3.amazonaws.com/wanasuvedigo/asthma_ppt_template.pdf
    • https://s3.amazonaws.com/godoremitiwuja/giwejanasikuku.pdf
    • https://uploads.strikinglycdn.com/files/743255e9-7477-4765-ab81-9b62feff5da9/gapedijebiwedik.pdf
    • http://muvasusug.epizy.com/furosemide_medication_guide.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_off0000f5b4.bin
33ad65aa9697347aef0b54410d741529666f5fc7e178b5db6fe4744959c9086d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B4 5248 bytes
font_01_sfnt_off000107b3.bin
209ddaf43b49c483189cd77897d39da6ae093ca6501252ba5e54c7b88858a0ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107B3 10052 bytes

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