Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb922aa2a38e902f…

MALICIOUS

PDF

75.0 KB Created: 2021-02-10 15:56:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 802e545cade7dd9162236d21dba19709 SHA-1: 98636ece1b0518e50f107c3e0aed901d7c8ae772 SHA-256: fb922aa2a38e902fba86315fc13c9975deb45a00a1dec4d44876d7e62b10765e
96 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious content. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into visiting a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to billing or important notices.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/123?utm_term=bill+c+38+date PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4381090/normal_5ff27fda298af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374360/normal_5ff3f63588121.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413017/normal_60024a9ae55ee.pdfIn PDF document text
    • http://helpcenter.business/66400811975z6vdn.pdfIn PDF document text
    • http://kekebum.22web.org/78543896593.pdfIn PDF document text
    • http://merishwheelrecords.com/prelude_to_programming_6th_edition_chapter_6_answersho82j.pdfIn PDF document text
    • http://mattelipsticks.site/jilirisazupixefijiwaft4ug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489257/normal_600e79f59cd13.pdfIn PDF document text
    • http://pet-guru.shop/jetpack_joyride_free_online_games_to_play7xbmp.pdfIn PDF document text
    • http://microbestdigitalmeter.xyz/writing_checklist_clipart9j8oc.pdfIn PDF document text
    • http://newowoliso.iblogger.org/futiketatejanipemetalot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387698/normal_5fe1ae4a468ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458144/normal_6023976b0c983.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tijibito.epizy.com/proyecto_de_grado_normas_apa.pdfIn PDF document text
    • http://kiganume.epizy.com/vavebakaromewexoja.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_off0000ea93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA93 5068 bytes
SHA-256: adb55ef15a158f84a0d310981f0ec39f673b162346625a1175534b9dfa32f217
font_01_sfnt_off0000fbe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE8 10384 bytes
SHA-256: 6a799799cdd63dc4a6f2cf3718ff0e64efbd17fb15709fa62c72713b37df9b5b

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