Malicious PDF — malware analysis report

Static analysis result for SHA-256 c899295659aa3f46…

MALICIOUS

PDF

75.6 KB Created: 2021-02-04 11:46:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e475f8766c574e19e339436ce1a70b42 SHA-1: d9bd4522e9d1e84f055860a1714322ffcf5b64f7 SHA-256: c899295659aa3f46e41b16c3a95a1775bb9ac770caa8364be3f30de11bb4e7a8
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL pointing to 'bologen.ru', which is a strong indicator of phishing or malware distribution. The PDF structure and metadata suggest it was generated by wkhtmltopdf, and the presence of an external URI heuristic further supports the malicious intent of directing users to an external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/123?utm_term=xiao+wang+lab PDF link annotation
    • https://cdn.sqhk.co/vuwipabobatu/ibzvC01/rewusefo.pdfIn PDF document text
    • https://cdn.sqhk.co/vemonososepa/g7jcsha/the_factory_at_franklin.pdfIn PDF document text
    • http://lemoxovuv.22web.org/descargar_cheat_engine_para_android_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417405/normal_600e33744f4c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428033/normal_6003b36257d91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414336/normal_600f7f948879d.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/poresi/binding_of_isaac_afterbirth_mom_transformation.pdfIn PDF document text
    • http://xamusewegelaru.rf.gd/90718422455.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/bangor_city_forest_report.pdfIn PDF document text
    • http://kafuxuf.epizy.com/6343768047.pdfIn PDF document text
    • http://gopudagob.epizy.com/paxafunawipijusukuxa.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/woxiwolufugikipomiletu.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/minozatuliwurovivabejabuv.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/vogorivadawi.pdfIn PDF document text
    • http://dosidojabar.epizy.com/color_by_number_for_adults.pdfIn PDF document text
    • http://vawujularow.rf.gd/vocabulary_words_worksheet_for_grade_3.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/bidet_installation_guide.pdfIn PDF document text
    • http://lonidur.epizy.com/bangalore_city_bus_numbers_information.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/tafurumij.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_off0000ebf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF7 4788 bytes
SHA-256: a448b94374d98473d227ac20a52a66d59314cca9bea350d03bef2a0f0b6fe7e2
font_01_sfnt_off0000fc6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6C 10904 bytes
SHA-256: 41fd8b8d421ea05ec9daa069e9967dda347e6a7e0a1ae13822eb015588531980

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