Malicious PDF — malware analysis report

Static analysis result for SHA-256 947343f8bf750a6e…

MALICIOUS

PDF

72.8 KB Created: 2021-05-06 16:51:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: fd9bdb5b600dfc6db22e941d006db392 SHA-1: 823729d0d8226866fe3b5cb13f9b79d350e29ac5 SHA-256: 947343f8bf750a6ea07d06defa0ec9c874c05fdc88ef5f832b0c6e2c56506426
96 Risk Score

Malware Insights

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

The PDF file contains embedded URLs, one of which, 'https://mezovuduw.ru/strik?utm_term=personal+math+trainer+geometry+answers', is flagged as malicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to 'math trainer geometry answers'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/strik?utm_term=personal+math+trainer+geometry+answers PDF link annotation
    • http://xogabimodefage.iblogger.org/best_workbook_for_couples.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462345/normal_600cec929d094.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471512/normal_5fcf9e5382704.pdfIn PDF document text
    • http://sunepoxuvigos.66ghz.com/xoriperakopalebabop.pdfIn PDF document text
    • http://doruguduku.iblogger.org/how_to_start_a_reddy_heater.pdfIn PDF document text
    • http://wuxizovawolimo.22web.org/lolitutomev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405642/normal_605a22815f273.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e0a971b2-7104-4718-9e5f-4f17d768618f.filesusr.com/ugd/6d43b6_b32f0a7238254aa4bf9683670c38d4bf.pdf?index=trueIn PDF document text
    • https://46ebecaa-9490-439b-bba6-ee77f1a6ca93.filesusr.com/ugd/cee8a1_84c1ea5a3a164aea885dd13e2f101d4f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/stargirl_jerry_spinelli_plot.pdfIn PDF document text
    • http://besakowipati.rf.gd/2465123007.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/74008225250.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/pafelus.pdfIn PDF document text
    • https://a181bb3e-7445-4f1f-a1cf-b2fe66c13e92.filesusr.com/ugd/91ce54_8643253f382b4f3b968ad52add87e9f1.pdf?index=trueIn PDF document text
    • http://sulowufesesikep.epizy.com/vimaluzegixowagorogataxiw.pdfIn PDF document text
    • https://82cb18f6-4a40-4824-ac11-10070f72ce02.filesusr.com/ugd/5aec95_21f5fd76500b4d7cb3fcc7e5687e1cee.pdf?index=trueIn PDF document text
    • https://748e6e98-33e2-4bd1-95aa-01ea3505a154.filesusr.com/ugd/704f6c_be70ac2c11d54cf881266afcbcba8121.pdf?index=trueIn PDF document text
    • http://xekepet.epizy.com/73817022914.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/jinakejo.pdfIn PDF document text
    • http://lusiromipu.epizy.com/linksys_e8350_router.pdfIn PDF document text
    • https://f3b8d348-8566-49c9-a9f8-a2c3b9e1bc8e.filesusr.com/ugd/f1c748_e6d3938e59204ec7a3674ddeb425a7ce.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD4 5292 bytes
SHA-256: fbd1420a91357a79291ada5595ad8a3db75c31f23238a619a4587eaa635e63c0
font_01_sfnt_off0000edb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB8 11444 bytes
SHA-256: 84ce4fa14261d16069d95ade8ac51e08f1bb4e84a9691cffa8c79476c1bc8087

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