Malicious PDF — malware analysis report

Static analysis result for SHA-256 be8f5a9b37c553ac…

MALICIOUS

PDF

63.8 KB Created: 2021-01-18 11:35:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 652b5a61399c3d0e00814302e24d8714 SHA-1: b96662f82c5d8c2eaf694d15684de4998325e652 SHA-256: be8f5a9b37c553ac22ccdefb8590bc026ec6a9a027fb5029fc154171096b8195
136 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of external URIs and embedded URLs suggests an attempt to redirect the user to malicious sites. The heuristic 'SE_LOLBIN_RUN_COMMAND' and the numerous URLs point towards a phishing or malware distribution scheme, likely involving the execution of commands or scripts.

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://bologen.ru/123?utm_term=2007+ttr+90+manual PDF link annotation
    • https://cdn.sqhk.co/galemojubemo/gIiaXZl/tic_tac_toe_emoji_game_in_python.pdfIn PDF document text
    • http://lakulikelanu.iblogger.org/word_with_friends_2_cheat_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/luwivimexu/gcMDPZY/lewijun.pdfIn PDF document text
    • https://cdn.sqhk.co/luxixumogez/7IvCqvK/sopajijobubabazapemem.pdfIn macro / runtime command snippet
    • https://cdn.sqhk.co/vujagefamig/23HTnRi/vemulelexibog.pdfIn PDF document text
    • https://cdn.sqhk.co/zifiguwosu/0hijghg/ac_ampere_meter_connection.pdfIn PDF document text
    • https://cdn.sqhk.co/towinomer/gmMhejc/sularokorebusidegetez.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/eggPcji/23629230890.pdfIn PDF document text
    • https://cdn.sqhk.co/noxibogalu/bhesQ9l/super_dancer_chapter_3_grand_finale_performance.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/Oifgjie/fireboy_and_watergirl_4_unblocked_games_66.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/jisejawanid.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/minecraft_1.16.40_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/ley_aborto_argentina_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/kaspersky_antivirus_for_pc_windows_xp.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/torijufojigilesanukopime.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/90650549765.pdfIn macro / runtime command snippet
    • http://nexaware.epizy.com/canterbury_city_council_housing_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/negesofodadiwikimi.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
    • https://s3.amazonaws.com/kewuxejikiwe/torIn macro / runtime command snippet
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE08 5068 bytes
SHA-256: abff7631c68e85cb6d0509cc153a176b89b168d665a7dfc974fa8e3644391548
font_01_sfnt_off0000cf30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF30 10188 bytes
SHA-256: 1b6a928b224c58ca477f6ae3afd096be52ebf431c239e1b5977c8d2f0b7603c0

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