Malicious PDF — malware analysis report

Static analysis result for SHA-256 74e18855fee6322d…

MALICIOUS

PDF

119.3 KB Created: 2021-03-21 00:37:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: b0b94514760b2186f17b48fb93c85d63 SHA-1: 46d3d2b2fac9fa7955759cdc9bed3acefb7d0d95 SHA-256: 74e18855fee6322d6ec8a086272fcace0e9d9850bfe6dd02e0d624cd9d47b282
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that mimics a search result for a software manual, likely to trick users into downloading a malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. No scripts were extracted, but the presence of external URIs suggests a downloader or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nipisod.ru/award?keyword=audacity+2.+0.+5+manual+pdf+download PDF link annotation
    • http://twenty-promo2020.ru/seninirugutuzonzdyc.pdfIn PDF document text
    • http://myirn.icu/zupenigujogalizavumuqf2l1.pdfIn PDF document text
    • http://mosquito.codes/how_much_can_i_earn_while_on_disability_support_pensionz7wmw.pdfIn PDF document text
    • https://cdn.sqhk.co/segevenujuka/Nhje5cH/fopewelovofijuxenegaxe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485457/normal_5fced78646425.pdfIn PDF document text
    • https://cdn.sqhk.co/bularalunop/6s9sjgD/city_train_driving_adventure_simulator_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387702/normal_6023e5c58f0bd.pdfIn PDF document text
    • https://cdn.sqhk.co/xufojidaju/Y8q3hht/34885160791.pdfIn PDF document text
    • https://cdn.sqhk.co/bogulevim/bvbjhtv/baltimore_ravens_bar_san_francisco.pdfIn PDF document text
    • http://taxiralimivi.iblogger.org/sevetijigaralonok.pdfIn PDF document text
    • http://netewe9.xyz/55312310313j287n.pdfIn PDF document text
    • http://zexixojusikor.iblogger.org/aadhaar_enrollment_correction_form_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460477/normal_6018637568e5c.pdfIn PDF document text
    • https://cdn.sqhk.co/jukowejazus/khgiehb/89116717685.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388824/normal_6017d079406d0.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/fifuto/podovowigonubilox.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/guidelines_and_criteria_for_poster_making.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/79112053238.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/poulan_pro_chainsaw_parts_breakdown.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/clinical_endocrinology_diabetes_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/bexolamabad/skyrim_enb_settings_guide.pdfIn PDF document text
    • http://junimuji.rf.gd/abacus_news_china_internet_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/98769410881.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000192ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x192EA 5640 bytes
SHA-256: 6ed5ebe93b6de7eb10b2d2e147d19712fc6eb256eca06514f415387df5177784
font_01_sfnt_off0001a63f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A63F 12108 bytes
SHA-256: 7727c3201b0c8c7de0cb0dccd72bb07eeea51f884206cf5be54d8fef0fa271ce

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