Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ac997cd71b9a1cf…

MALICIOUS

PDF

87.6 KB Created: 2021-05-06 10:07:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e55b1980d59316b2a63a805b3441ef0d SHA-1: 9f093cff1162a04f8b492c0eb21c0ba77a53a4ca SHA-256: 5ac997cd71b9a1cf7dd69ccf9b6dda374df303594b5348a3d029d090099ad52d
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to contain search terms related to a book, suggesting a lure to disguise the malicious intent. The ML classifier and ClamAV detection strongly indicate malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://gimoguvi.ru/strik?utm_term=i+am+malala+book+barnes+and+noble PDF link annotation
    • http://jidonuse.iblogger.org/xikabasizuladozolibabaf.pdfIn PDF document text
    • http://tifusavegapawuf.mygamesonline.org/7569777259.pdfIn PDF document text
    • https://cdn.sqhk.co/gapekozuwa/vnFcLhd/nickelodeon_super_brawl_universe_best_characters.pdfIn PDF document text
    • http://dapurixid.sportsontheweb.net/format_of_experience_certificate_for_civil_engineer.pdfIn PDF document text
    • https://cdn.sqhk.co/xonivozew/djuggjf/it_s_a_22_pew_pew_girl.pdfIn PDF document text
    • http://buvalopexur.mygamesonline.org/diagnosis_of_bacterial_infections.pdfIn PDF document text
    • http://fakurivevid.scienceontheweb.net/sarutawupizidopifer.pdfIn PDF document text
    • https://cdn.sqhk.co/jizuxadif/3vXyBM3/forbes_magazine_cover_today.pdfIn PDF document text
    • https://cdn.sqhk.co/pivokazi/jvhaBhb/gipudumuvudun.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
    • https://s3.amazonaws.com/sixolose/36611165542.pdfIn PDF document text
    • http://genolesatoj.epizy.com/afmc_question_paper.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/tagalog_dubbed_full_movie.pdfIn PDF document text
    • https://5d55c623-01b0-417f-8131-8dfd0334080c.filesusr.com/ugd/9ef046_369bb9c921804db4966a8c09eed9e3ac.pdf?index=trueIn PDF document text
    • http://baverasoge.epizy.com/video_er_for_pc_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/walter_piston_harmony_5th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d49a14b3-209f-434f-bfe6-8606ff1b1574/nevewavuvuzarazevone.pdfIn PDF document text
    • http://xapakiz.rf.gd/93989189996.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bb1b4f8-27d7-426a-b4bd-f492265107e1/nasinijinaminulunom.pdfIn PDF document text
    • http://pemukusa.epizy.com/famopu.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/patovuwela.pdfIn PDF document text
    • http://fazobelo.onlinewebshop.net/myers_briggs_personality_test_free_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2bba5f8-895c-4937-865f-92ac450be8ee/technical_drawing_app_ipad_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d23262b-2036-441b-ab44-129d6d74e6a1/19444229401.pdfIn PDF document text
    • https://d4e73f68-9870-4c81-be0c-0a6dd7607cd2.filesusr.com/ugd/6f53d7_610d3f7e588b45119a139583bc126739.pdf?index=trueIn 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_off00010ad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD8 4772 bytes
SHA-256: 5b9398a40855fb9f2b1d255a4a0dd0dd5a33fa59b0a9829a1a9bc30a979b2849
font_01_sfnt_off00011adb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ADB 11576 bytes
SHA-256: 0b532c49f76803b60140484ef845cb3a8b43ae33931e7f5924ab3fb9938a8bc5
font_02_sfnt_off00014142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14142 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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