Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba473c7ac86f5ac7…

MALICIOUS

PDF

74.0 KB Created: 2021-03-25 08:26:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e39550aac2cfd0c49ffa5553bf8cd7c4 SHA-1: 7e96a460cf4ebfab90e9d229792a156106040ce3 SHA-256: ba473c7ac86f5ac7ecf68af9b88ef63f6750b838beaf6e8f903a1112f8e3cce5
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that leads to a suspicious domain, identified by heuristics as a potential phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site for further exploitation.

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://kuzutuzo.ru/wix?keyword=xprivacy+pro+full+apk
    • http://f13x.xyz/7909671592fzeo3.pdf
    • http://bopugafuwu.scienceontheweb.net/54685910233.pdf
    • http://bometaximom.scienceontheweb.net/asset_allocation_portfolio.pdf
    • http://jepisafidezegun.scienceontheweb.net/pic_assembly_language_tutorial.pdf
    • http://mowukedova.mypressonline.com/tejose.pdf
    • http://wejnpowk.space/60008222426xixf0.pdf
    • http://fanutoragozogow.sportsontheweb.net/39288021330.pdf
    • http://vupaniseb.iblogger.org/how_to_make_heart_origami_paper.pdf
    • http://copyrightprivacy.site/40915664679xq7pv.pdf
    • http://prosale.company/62679413927kfv05.pdf
    • http://mofonuf.medianewsonline.com/pawukinasuku.pdf
    • http://folejaf.mypressonline.com/how_to_crochet_waffle_stitch_for_beginners.pdf
    • http://xepidenad.scienceontheweb.net/sharepoint_2013_download_a_folder.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d6889edc-a540-4513-a82b-a5392f7e8d77/first_aid_usmle_step_2_ck_latest_edition.pdf
    • https://uploads.strikinglycdn.com/files/39585675-564d-4a6e-8edc-97dc503cb1a3/polk_audio_soundbar_problems.pdf
    • https://uploads.strikinglycdn.com/files/b72cf9cf-9edb-4a23-bddf-4b3d8d774d1a/optiplex_gx620_drivers_windows_xp.pdf
    • http://xenituv.rf.gd/ib_physics_ia_ideas_easy.pdf
    • https://aa6d2f86-95e2-42cc-897e-6bbd71c3a116.filesusr.com/ugd/78daac_02250e96ca8d499ba88a1713fe931eb0.pdf?index=true
    • https://9fc80a0e-b25b-4135-afeb-9811a1ea6bf8.filesusr.com/ugd/91e123_b8305d8e54564ad08283a92326ece357.pdf?index=true
    • https://6184de0c-c318-42a7-882e-c5ddc63b817d.filesusr.com/ugd/1c8c1e_ff1be3c079b24841be23eb32968db3f1.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d1998ff9-6759-41c5-b1c5-5ff4a8d45752/84431223214.pdf
    • https://fb4bdcd3-28a3-4206-a6c3-fb267f511c23.filesusr.com/ugd/0ad562_ffba1d2a783342148307bad4271c9366.pdf?index=true
    • http://finanetut.rf.gd/xopagomiv.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_off0000e524.bin
962774cb4127407c8937c87ade01f72aac605077accc7d5878112830cc701d8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE524 5032 bytes
font_01_sfnt_off0000f664.bin
eca67e791366c95f67e4b926a7f8a7289573e7b4cb0d508d4e62f78eec37ed30		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF664 10728 bytes

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