Malicious PDF — malware analysis report

Static analysis result for SHA-256 05b170010a3af7d1…

MALICIOUS

PDF

70.6 KB Created: 2021-03-14 00:17:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25a793807f8a053676cbf309cacbba55 SHA-1: 93b83444db311481a414f86aa2afe42c06a64c3c SHA-256: 05b170010a3af7d100861746bbb8a662fd82689d4e2af333db56ef8c26562ccf
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 a URL that mimics a search result for a free PDF, suggesting a lure to download malicious content. While no scripts were explicitly extracted, the nature of the detection and the embedded URI indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jumiwimov.ru/wix?keyword=the+last+song+book+pdf+free
    • http://tobufupevujuma.mygamesonline.org/17697072581.pdf
    • https://votozugilom.weebly.com/uploads/1/3/1/0/131071295/9ced45f8980cd3a.pdf
    • https://dasirexifavud.weebly.com/uploads/1/3/5/3/135320576/8614596.pdf
    • http://repochka.site/talasemia_tratamiento_nutricionalw8psb.pdf
    • https://tojaxufuvubugo.weebly.com/uploads/1/3/4/6/134641466/kadetawur.pdf
    • https://cdn.sqhk.co/wuzirixowev/ieF4gim/game_voice_chat_app_free.pdf
    • https://cdn.sqhk.co/nemoludajedu/hcfibJF/adversaries_dictionary_definition.pdf
    • https://rilobajivevet.weebly.com/uploads/1/3/1/4/131438099/ravose_seruji.pdf
    • https://cdn-cms.f-static.net/uploads/4413835/normal_6017f89434825.pdf
    • https://cdn-cms.f-static.net/uploads/4469630/normal_603f1c45a4721.pdf
    • https://cdn-cms.f-static.net/uploads/4451365/normal_60210bff01603.pdf
    • https://static.s123-cdn-static.com/uploads/4459794/normal_5ff2f12f5d632.pdf
    • http://help-business-media.com/jusazitq6627.pdf
    • http://akillidestekbasvuruformu.online/rutarujapujasztib.pdf
    • http://nigemutekilum.mypressonline.com/angles_in_polygons_tes.pdf
    • https://cdn-cms.f-static.net/uploads/4450336/normal_6042c35679474.pdf
    • https://cdn.sqhk.co/tedubifo/gjDjdja/nozetikepopobawerarugim.pdf
    • http://musc-media.xyz/mujezagdcm1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://mojogoralil.onlinewebshop.net/kanaputotifikowizid.pdf
    • http://batapijas.myartsonline.com/221b_baker_street_board_game_clues.pdf
    • http://luzojora.atwebpages.com/arita_butterfly_valve.pdf
    • http://xiwozoget.atwebpages.com/ap_english_literature_and_composition_practice_exam_answer_key_2016.pdf
    • http://zedofaxuboz.onlinewebshop.net/noun_phrase_quiz.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_off0000d61f.bin
9569bfa674e255891608f0337b09e4da1750d3f5cb55756fe300560ba7c35bf3
pdf-font-stream PDF embedded font (sfnt) at offset 0xD61F 5456 bytes
font_01_sfnt_off0000e8a1.bin
e72ced8a5ad216eb0124b284980698de1e3a007dae1924ec6bf2d5aada7a5ff3
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A1 10780 bytes