Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9596c9c8e685650…

MALICIOUS

PDF

83.9 KB Created: 2021-05-20 15:14:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 78429ce2503e879a3c9a821aadf3309d SHA-1: c474ef3c03e0c56acaa842a48387477e27e76c54 SHA-256: a9596c9c8e6856500bc39ec84bad0297384f002cef3b75e723f8b851389ce3d9
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, likely as part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, and the document body, though heavily obfuscated, appears to be a lure related to finding a specific PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://leonvi.ru/strik?utm_term=al+muqaddimah+ibnu+khaldun+bahasa+indonesia+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413362/normal_5ffe8ced1d424.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366028/normal_5fcb485f27b1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462059/normal_606a140565e81.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366655/normal_5fffa95b78dc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425230/normal_606463e26e52e.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/nonipesikiri/most_difficult_interview_questions_and_their_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/timituvupame/award_winning_ugly_sweaters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f77c0951-caee-4204-8fc2-9c00f03b72ce/minn_kota_ulterra_remote_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fc7e9ee-49f6-471a-950f-bbdde307d4cc/good_nail_salons_open_late_near_me_early_on_sunday.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c55ffb29-d325-48e2-9ba9-d4cf934cd6f0/does_my_2013_ford_escape_have_a_recall.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/xasigisojin.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/luloket.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/asian_airline_stewardess_uniforms.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/tupopakuwuvupefubudufofo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abd17c4c-5bbf-44ce-ac44-015f41c74a8c/kobodejazalor.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/rewape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44d1b310-a357-4606-9cc6-159f6b8b5376/power_book_of_ghost_episode_11.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/24729601658.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/berliner_platz_1_testheft.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97008c8d-0612-4d19-acba-212422413a52/how_to_get_davinci_resolve_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe70decf-b9bc-46ac-b84a-ccfafb305f02/how_to_start_bread_bakery_business_in_nigeria.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/boxuzeba.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF126 5504 bytes
SHA-256: 0c73b861ad8ba1098e699735632ff976c3d692f61150611304241a48afb41e10
font_01_sfnt_off000103b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B5 10628 bytes
SHA-256: c0198f13d0b638d996adbe0e75d054621fee1fedf9d1bb47d2c469993225b8f7
font_02_sfnt_off00012850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12850 17304 bytes
SHA-256: 53b7ce2691ce62df17196d9733714a0224f17e0af46cb0f4c9c38cc99eedbce8

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