Malicious PDF — malware analysis report

Static analysis result for SHA-256 5108fcb735b2945c…

MALICIOUS

PDF

69.6 KB Created: 2021-03-03 15:40:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b86f5c08bd5d914abf044a3e1efa6d0b SHA-1: 59df19d30388a22b320b12524102906a5d1714fb SHA-256: 5108fcb735b2945cae728498f6656298d4fd9f08eacc8e16eb15071ddc183ec5
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to 'zajinet.ru', which is likely the primary malicious destination. The document body, though heavily obfuscated, contains references to 'Gone tv series full episodes', suggesting a lure to attract user clicks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/strik?utm_term=gone+tv+series+full+episodes
    • http://sokepazetovul.22web.org/fluval_305_canister_filter_setup.pdf
    • https://cdn-cms.f-static.net/uploads/4530171/normal_6035b4bc0c8d7.pdf
    • http://doxisolawasusig.66ghz.com/adobe_after_effects_aegp_plugin.pdf
    • http://itravelgr.com/ubuntu_linux_command_linez0kg8.pdf
    • http://espaceclient-cmb.com/loopback_adapter_meaningly0a6.pdf
    • http://pressit.space/what_does_chi_number_stand_for_in_medical_termsc2w41.pdf
    • http://ledimpress.biz/revefoneratokubarjk5q.pdf
    • http://storergoods.site/how_to_be_an_anime_character_in_google_meet2h289.pdf
    • https://wesuzimowigimeb.weebly.com/uploads/1/3/4/7/134745326/metisugujazoni_teguxegutusor.pdf
    • https://cdn-cms.f-static.net/uploads/4472186/normal_6034f22177921.pdf
    • http://badge-verification-center.com/rewidogatororud8hs2y.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zuraravata.epizy.com/iphone_facebook_messenger_for_android_apk.pdf
    • http://dexedigobejo.rf.gd/the_holy_road_movie_trailer.pdf
    • https://s3.amazonaws.com/matogapibelifiv/nusalitepudajobifeteter.pdf
    • http://kajopulijus.epizy.com/gobefu.pdf
    • https://s3.amazonaws.com/ruzaganog/paper_cutting_art_templates_free.pdf
    • https://s3.amazonaws.com/zemigiduwagafu/game_awards_2020_game_of_the_year_reddit.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_off0000d43d.bin
1ad0ff7c76e8e2f424862441dbb041c6ae880a4075c356ae030045fab42bb788		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD43D 4916 bytes
font_01_sfnt_off0000e512.bin
ebf3330038e199d1cc3f819ce266789bb748e470bf3d018f925ece3d16080ddd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE512 10628 bytes

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