Malicious PDF — malware analysis report

Static analysis result for SHA-256 b71c0a787df384e3…

MALICIOUS

PDF

81.1 KB Created: 2021-03-28 08:01:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 748996ada734a14ff007205495c0c1b3 SHA-1: 70f98b313d66a1adb4b37aa528c8d42d203c2b0d SHA-256: b71c0a787df384e3645b6323145690f9176703cbb814f7a450d41b5251f93320
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dugedepap.ru/strik?utm_term=gre+333+words+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450040/normal_5ffc2c91191ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452161/normal_5ffd6ee5b9908.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403117/normal_600871c1be272.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390638/normal_5ff90385dbb4f.pdfIn PDF document text
    • http://vuzatiriranune.22web.org/tamil_album_cut_songs_isaimini._com.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422373/normal_60272a2618c4f.pdfIn PDF document text
    • https://cdn.sqhk.co/tosilura/ij8v7hg/arcade_ball_top.pdfIn PDF document text
    • https://cdn.sqhk.co/wadelovelo/AhgHBEQ/vilaturemuwopom.pdfIn PDF document text
    • https://cdn.sqhk.co/luwiliziv/jj3tMTL/20390738974.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381988/normal_600b7246acd20.pdfIn PDF document text
    • https://cdn.sqhk.co/pubisifibuj/PFhaqDp/vector_airsoft_gun_cheap.pdfIn PDF document text
    • https://cdn.sqhk.co/vozupowo/iEXhaYY/top_ninja_movies_imdb.pdfIn PDF document text
    • http://lewodozena.22web.org/tecnologias_de_la_informacion_en_las_empresas.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/a57923c5-f224-4070-982e-5bd543ebcf12/mi_planta_de_naranja_lima_captulo_1_resumen.pdfIn PDF document text
    • http://nidomuku.rf.gd/keriwodokedegapew.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxefemebidaz/60538437756.pdfIn PDF document text
    • https://s3.amazonaws.com/rirusozo/talk_to_me_in_korean_level_1_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/navy_asvab_practice_test.pdfIn PDF document text
    • http://kimenos.epizy.com/57470359988.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07ed0fdb-ff5d-4c51-a637-3282c2118f8f/the_crown_season_5_cast_pictures.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe194ced-a4cd-475b-b4eb-505765686291/basic_electrical_engineering_course_outline.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/whatsapp_for_android_2._3._4.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_off00010535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10535 5080 bytes
SHA-256: 11a31e62fd84c8fc9ebbd4de2c9f7ca09176310954722720d958544d5c786fab
font_01_sfnt_off000116a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A9 9484 bytes
SHA-256: 64039d83b4b1ad06b6ed88f9cf359bc6cf071221fffb90627460a9c58073d2a2

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