Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f201f434fad9b3c…

MALICIOUS

PDF

72.4 KB Created: 2021-02-18 10:19:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 167eedee9d468db803ccbe0fa6d0b276 SHA-1: da8d107e579c1c1db434a910ee798e272b18765a SHA-256: 0f201f434fad9b3cc0abdbea68ade7b317e37f5c7b2c278c62eae7d2a326578f
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical alert for a malicious redirector link and a high ML score. The embedded URL, https://crophysi.ru/123?utm_term=unreal+engine+4+medieval+assets+free, is a strong indicator of a phishing or malware distribution attempt. While no scripts were explicitly extracted, the nature of the PDF and the malicious link suggest it is intended to lure the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/123?utm_term=unreal+engine+4+medieval+assets+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387718/normal_601a364c8cb02.pdfIn PDF document text
    • http://vezdesami.ru/anonymous_text_to_speech_software1e6ed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481695/normal_5fe599fec56f0.pdfIn PDF document text
    • http://alisabor.design/livro_psicologias_gratiseokde.pdfIn PDF document text
    • http://xxlmature.site/213562962212ervc.pdfIn PDF document text
    • http://hellochildren.online/lessee_information_sheet_subsequent_filing78rvx.pdfIn PDF document text
    • http://thedefenseforge.com/64349915749402t3.pdfIn PDF document text
    • http://domavera.ru/interview_with_the_vampirecn6ox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444885/normal_5fcc90e3801d8.pdfIn PDF document text
    • http://fruit-ital.space/jakujebawukadirinuzg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463262/normal_600a93e92bc50.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378834/normal_5ffa264c7946f.pdfIn PDF document text
    • http://merovew.xyz/lenovo_support_center_near_mej69sw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420230/normal_5fca08d9478f8.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/gosete/90385690635.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/95021730800.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/wishfin_cibil_report_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/lunastra_mhw_pc_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/fluoroscopically_guided_lumbar_injection.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/aspects_of_verbs_worksheets_grade_6.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_off0000dba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA9 5368 bytes
SHA-256: 35e87acaa066124b67e66588d5b571ea2a4521975df92968f0ef619e748b729a
font_01_sfnt_off0000ede4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE4 11320 bytes
SHA-256: 9bd1d6bda4a5b7f48f90ba5175b1f8a6597711304f7b237edbeaea3d8b4be36b

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