Malicious PDF — malware analysis report

Static analysis result for SHA-256 04a185b51a80fa5b…

MALICIOUS

PDF

74.6 KB Created: 2021-04-01 21:21:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 4c18f279d45ebba7de9db296d5d12308 SHA-1: ca8eeb9441366d6647a0df76bf3b51f56a0089a8 SHA-256: 04a185b51a80fa5b68945224e12687e6202902bc386ac1e335058cb2ef798ad7
104 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 'gimoguvi.ru', which is likely a phishing domain. The presence of a 'download button' heuristic further supports the phishing lure. No scripts were extracted, but the overall structure and heuristics indicate a malicious intent to trick the user into visiting a malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gimoguvi.ru/wix?keyword=aha+acls+manual+free+download PDF link annotation
    • http://nijaxubazaziw.mypressonline.com/undang_undang_dasar_1945_sebelum_dan_sesudah_amandemen.pdfIn PDF document text
    • http://pasipodo.mypressonline.com/vupatudafekusajebiturini.pdfIn PDF document text
    • http://busimaderule.mywebcommunity.org/wedding_march_music.pdfIn PDF document text
    • https://cdn.sqhk.co/pomoliwekag/UWvejhe/wifi_scanner_app_android.pdfIn PDF document text
    • http://barajofa.mywebcommunity.org/sat_books_to_study.pdfIn PDF document text
    • http://gaxesujite.medianewsonline.com/cestina_express_1_chomikuj.pdfIn PDF document text
    • https://cdn.sqhk.co/reriwoduriju/Eicjfgd/jetblue_ground_operations_crew_salary.pdfIn PDF document text
    • http://fesebenawasoz.iblogger.org/17095167298.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/lekelepowo/daily_bible_reading_plan_in_chronological_order.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/chaos_2005_full_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/maps._me_api_android.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/jivasiwetosupi.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/witaz.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/49566730266.pdfIn PDF document text
    • http://rumawotipu.epizy.com/zumuporoke.pdfIn PDF document text
    • http://silimafimutoj.rf.gd/bothrops_jararaca.pdfIn PDF document text
    • http://zesafemumibow.myartsonline.com/sun_joe_spx3000_will_not_turn_on.pdfIn PDF document text
    • http://wukevivetarapu.myartsonline.com/baylor_football_schedule_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/tazodivagupuxejudupi.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/mozilla_firefox_app_for_computer.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_off0000e4a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A5 5344 bytes
SHA-256: e5bf4f78ee9315b9813ff6b1a5511a193e2f91b5b3e38739962f23bda2a20d81
font_01_sfnt_off0000f6b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B4 10788 bytes
SHA-256: aeb812e76c74803974624ee8e3d9945abdebb1f0251b2d7f1d7e91ed913bd4de

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