Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ed9542584de97cf…

MALICIOUS

PDF

76.6 KB Created: 2021-04-01 16:31:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2522c81ef56a6471e3f79b271de3ee00 SHA-1: 825de8b545b336c952df56393163565c6f77bfd1 SHA-256: 5ed9542584de97cf8574d4cca1134e33c7c26cb8a68790ea1097bdbccdf8105d
96 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, suggests a lure related to religious text ('Moniciones xxii domingo del tiempo ordinario ciclo c'). The presence of numerous external URLs, including one flagged as suspicious ('jumiwimov.ru'), strongly suggests this PDF is designed to redirect users to malicious sites, likely for phishing or to download further payloads. No scripts were extracted, but the PDF structure and embedded URLs are sufficient indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/strik?utm_term=moniciones+xxii+domingo+del+tiempo+ordinario+ciclo+c
    • http://fejoromawefobo.22web.org/50408049404.pdf
    • https://cdn.sqhk.co/biwopeka/hdjdhjN/dilineze.pdf
    • http://kimidenexikox.getenjoyment.net/39849346808.pdf
    • http://senaxemuj.iblogger.org/74385997330.pdf
    • http://mumixeniseja.iblogger.org/english_grammar_test_with_answers_for_beginners.pdf
    • https://cdn.sqhk.co/tezabulaw/chcHihP/dolodepiga.pdf
    • http://jebifawulu.mywebcommunity.org/cc_y_behringer_inuke_nu6000dsp.pdf
    • https://cdn-cms.f-static.net/uploads/4382631/normal_600ab079d6b54.pdf
    • https://cdn-cms.f-static.net/uploads/4446155/normal_6010b2ca752f8.pdf
    • https://cdn.sqhk.co/xuxodokoju/jaFghgk/21064158765.pdf
    • https://cdn.sqhk.co/fuwegamuvev/7WjfieQ/zombs_royale_unblocked_games_66.pdf
    • https://cdn.sqhk.co/pewonogip/ifbNSxC/48838693395.pdf
    • https://cdn.sqhk.co/fafujedajir/f6ibggv/34109354777.pdf
    • http://tofofupetofido.iblogger.org/bunamopogijejofidofu.pdf
    • https://cdn-cms.f-static.net/uploads/4446155/normal_605222bd65ebf.pdf
    • https://static.s123-cdn-static.com/uploads/4393488/normal_5fef0b822014f.pdf
    • https://cdn-cms.f-static.net/uploads/4426423/normal_6052413abb8c7.pdf
    • https://cdn.sqhk.co/xamizine/beUzoZo/gutogadalopegirujipo.pdf
    • https://cdn.sqhk.co/pesasotiro/hjaHjaQ/zudipipop.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://supikovibamukip.epizy.com/pirates_caribbean_sheet_music.pdf
    • http://xedaxabefax.rf.gd/rexiguvizizuzukobu.pdf
    • http://daxijofasazavod.rf.gd/77353595066.pdf
    • http://xigesema.epizy.com/python_format_list_of_integers.pdf
    • http://zagopemolal.rf.gd/karafar.pdf
    • http://fijumusuxolegoj.atwebpages.com/schengen_visa_application_form_vfs.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_off0000e92b.bin
ff0a94460a3e8b47293daa2e7e043636df9f654b593ed74853241d2784d95c43		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE92B 5468 bytes
font_01_sfnt_off0000fbb8.bin
122bad4e4c174304e70c37139b3b29ea05ca86605fa3e1209156e7a683cc8caa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB8 12120 bytes

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