Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4726ce2a7a5c18a…

MALICIOUS

PDF

102.0 KB Created: 2021-05-31 22:16:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff4463a92186baea73e32511b2093a66 SHA-1: 18b997a4a6af5008fa23f63d2560853f5d70186a SHA-256: f4726ce2a7a5c18ab10b7410696952d6f67443929eea3e89ea21bf98e9a822eb
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URL that leads to a suspicious domain, likely intended to trick the user into clicking it. The document body, though heavily obfuscated, appears to be a lure related to search results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://krisoc.ru/pbw?utm_term=what+are+the+five+constant+relationships+in+confucianism
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xifilipisi.pbworks.com/w/file/fetch/144414102/how_to_get_free_fire_advance_server.pdf
    • http://wamotarirup.pbworks.com/f/57340543747.pdf
    • https://uploads.strikinglycdn.com/files/42eca397-73cc-4efb-bad2-843624a7b5b4/mad_max_2_full_movie_free_download.pdf
    • https://uploads.strikinglycdn.com/files/5ae79856-6850-4769-8009-3164d3784104/free_download_avast_pro_antivirus_full_version_with_key.pdf
    • http://kufujibumufa.pbworks.com/f/94319790788.pdf
    • http://bovojigu.pbworks.com/w/file/fetch/144420165/winter_horse_feeding_advice.pdf
    • http://bupataved.pbworks.com/f/how_much_does_a_minky_couture_blanket_cost.pdf
    • http://zezimin.pbworks.com/f/gw2_raptor_mount_guide.pdf
    • https://uploads.strikinglycdn.com/files/df5abf84-2cef-4061-825c-aef48b2a4a57/codigos_como_programar_un_control_universal_general_electric.pdf
    • http://jajafad.pbworks.com/w/file/fetch/144420774/gesub.pdf
    • http://tagexoba.pbworks.com/f/devipefe.pdf
    • http://rugewenuzed.pbworks.com/w/file/fetch/144421794/51978280902.pdf
    • http://kiletejude.pbworks.com/w/file/fetch/144412593/percy_jackson_books_online_download_free.pdf
    • http://sizolasipape.pbworks.com/f/27006328167.pdf
    • http://kedetuwi.pbworks.com/f/my_talking_tom_2_mod_apk_ios_download.pdf
    • http://fipivuzigoge.pbworks.com/f/suzakonafegupul.pdf
    • http://jajisaparev.pbworks.com/f/jadajisem.pdf
    • https://uploads.strikinglycdn.com/files/dcd106d1-dd61-4daf-8091-e3d9732e1c91/how_to_analyse_data_using_simple_percentage.pdf
    • http://tisowowuduwe.pbworks.com/f/qumica_fsica_atkins_8_edicin_descargar.pdf
    • http://wejojixi.pbworks.com/f/realidades_1_capitulo_7a_actividad_11_answers.pdf
    • http://xalanupuzewo.pbworks.com/f/56580817071.pdf
    • http://jesababa.pbworks.com/f/what_does_service_due_soon_a12_mean.pdf
    • http://garigor.pbworks.com/w/file/fetch/144424743/que_paso_ayer_4_pelcula_completa_en_espaol_latino_youtube.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014508.bin
2116400663445d2d84876f2c38c7f168cb1149ed4ab652cd5bc10554ac3c189a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14508 3072 bytes
font_01_sfnt_off0001500a.bin
a9492e2ba860c4d9ba3e0c82915ac2178571d0ab1ad774398a461206a77b7b94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1500A 5328 bytes
font_02_sfnt_off00016213.bin
456a8a0ac1086187dea1980bbddc73ee4898577810c8cbfa37e860bf0cc7a0d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16213 12664 bytes

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