Malicious PDF — malware analysis report

Static analysis result for SHA-256 54bfb7b0bda2bfb6…

MALICIOUS

PDF

72.9 KB Created: 2021-03-23 12:02:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86854f30d5ad4054369d7d6ce30c21c9 SHA-1: daa959fd71b194086a75d535cf29c067d434b240 SHA-256: 54bfb7b0bda2bfb6dc87663aacf43806b5c90cc4582744d833b15e743f567a1f
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF document contains heuristics indicating it is a browser extension installation lure, a common social-engineering tactic for malware delivery. It also contains an embedded URI pointing to a suspicious domain, likely serving as a download or redirection point for a malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving exploitation and potentially JavaScript execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://druttle.ru/wix?keyword=give+up+game+2
    • http://jemulobapamiwu.mywebcommunity.org/yo_amo_a_juan_querendon_captulo_1_online.pdf
    • http://toselarasomax.iblogger.org/50143983418.pdf
    • https://static.s123-cdn-static.com/uploads/4393019/normal_5ff13a542866e.pdf
    • https://cdn-cms.f-static.net/uploads/4412599/normal_5fd8857bddf80.pdf
    • https://cdn.sqhk.co/josurowelimu/xFxHibn/anime_girl_pose_3d_apk_free.pdf
    • https://cdn.sqhk.co/ximegawaso/hbyUwAj/who_is_the_guy_behind_the_infographics_show.pdf
    • http://tarageleg.iblogger.org/nfhs_basketball_rules_book_2020_18.pdf
    • http://soguged.22web.org/data_security_policy.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vafipisepofowo.epizy.com/employee_cash_advance_form_excel.pdf
    • http://newubopuga.epizy.com/chittagong_university_admit_card_2018.pdf
    • https://6e7ef639-f89a-4701-86f9-710a836f1183.filesusr.com/ugd/12745a_6b95f8d619eb48f48928d038a52d0673.pdf?index=true
    • https://uploads.strikinglycdn.com/files/60dc4101-b287-49c0-a975-58bca13b2a62/oregairu_light_novel_download_sub_indo.pdf
    • https://uploads.strikinglycdn.com/files/44848a7a-b36f-4ab0-a30b-7a0c98dd8324/tanenataxulukivedefuzol.pdf
    • http://xuvuzonixo.onlinewebshop.net/crochet_waffle_stitch_granny_square_blanket_pattern.pdf
    • https://521a9f5b-5c7e-4f25-a9e4-5446fb1b1975.filesusr.com/ugd/c1a494_a8a2b5db8b8447a492754f129759c4c9.pdf?index=true
    • http://kikanelomer.onlinewebshop.net/boy_scout_oath_and_law_meaning.pdf
    • https://uploads.strikinglycdn.com/files/da5bc378-4136-42a7-bc5c-b584349d0538/adele_someone_like_you_piano_sheet_music_free.pdf
    • https://uploads.strikinglycdn.com/files/76aba87c-3e50-4898-91eb-ea1f12dcdd5e/36108411827.pdf
    • https://uploads.strikinglycdn.com/files/3135089b-ed88-41c7-b911-d2dbe0666bdb/casio_5302_battery.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_off0000deee.bin
eed7051a15ef253e756d5229e5fc56699d122ee7b2488a8d9d3788eb6bf106c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEEE 5056 bytes
font_01_sfnt_off0000f025.bin
98612c3b8c49ea2dc53e2fe4a0831d0f122dedd91f335717b6f45f0b0f6fa5c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF025 11412 bytes

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