Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa2a514df8bc7975…

MALICIOUS

PDF

76.4 KB Created: 2021-02-25 21:38:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 713abacaad3b373269dfd9b1d8371031 SHA-1: 99c4e5181f3464593abc947bc807b47fde04d6da SHA-256: aa2a514df8bc797578d7394a64de9be6961172e13d734fdce07c966892513c02
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a URL that mimics a search result, likely serving as a lure for users. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/wb?keyword=maytag%20quiet%20series%20100%20accumulator%20filter PDF link annotation
    • https://cdn.sqhk.co/tonufipu/fgcLgfj/ruputodebaj.pdfIn PDF document text
    • https://cdn.sqhk.co/sifalavuxozo/gemxiiE/dragy_gps_performance.pdfIn PDF document text
    • https://cdn.sqhk.co/xamowizaso/5B239gf/stick_shadow_fighter_mod_apk_latest_version.pdfIn PDF document text
    • https://cdn.sqhk.co/lofopapenow/zjeb3gi/fetodolobutajuxaxego.pdfIn PDF document text
    • https://cdn.sqhk.co/zifuvifiweva/nkXhhEg/masterminds_movie_1997.pdfIn PDF document text
    • https://cdn.sqhk.co/wojipezusax/ahjKjab/pizotipuniburesa.pdfIn PDF document text
    • https://cdn.sqhk.co/logubaxe/ghhheid/gooz_io_apk_downloader.pdfIn PDF document text
    • https://cdn.sqhk.co/tumosirewuw/HTGK8ge/suzulumuwabagenawe.pdfIn PDF document text
    • https://cdn.sqhk.co/naxokujim/achgjxQ/nitumaworaritedabir.pdfIn PDF document text
    • https://cdn.sqhk.co/guvawatuzax/BjjghVO/dawnbreaker_skyrim_uesp.pdfIn PDF document text
    • https://cdn.sqhk.co/sutadejuna/hc5djfM/tosejukoragupeneso.pdfIn PDF document text
    • https://cdn.sqhk.co/jarebomu/jcJ7Aig/28688908647.pdfIn PDF document text
    • https://cdn.sqhk.co/xubipoxeguza/icuPQih/how_to_play_brain_it_on_level_55.pdfIn PDF document text
    • https://cdn.sqhk.co/xajamenujo/70ggHje/bigolaremenivor.pdfIn PDF document text
    • https://cdn.sqhk.co/gejupajo/jdhjArg/amc_ahmedabad_corona_positive_list_today.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://texatopewewew.epizy.com/72848581975.pdfIn PDF document text
    • http://pidawuz.epizy.com/whatsapp_free_for_ipad_air_2.pdfIn PDF document text
    • http://wewiritat.epizy.com/fatuxipege.pdfIn PDF document text
    • http://mujunego.epizy.com/how_many_polar_bears_are_in_canada.pdfIn PDF document text
    • http://mirepili.epizy.com/char-_broil_performance_series_t47g_test.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF24 5404 bytes
SHA-256: a1c40b6a0ba626798c67f4c11587dff6c54e33a149e7e8e205b7dc595535f9f0
font_01_sfnt_off0000f19c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19C 10788 bytes
SHA-256: c9da249dbb6a721a1e941e046cca34477dba84dbcfbd643bcd8e850a2fd3a25f
font_02_sfnt_off00011633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11633 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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