Malicious PDF — malware analysis report

Static analysis result for SHA-256 995b20650cb14094…

MALICIOUS

PDF

70.1 KB Created: 2021-02-26 02:57:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7cdeda0ed89cbaca4dbbbc7d72133d14 SHA-1: c632b08f8521acf8006dcc53e1c2ad2bab6b1657 SHA-256: 995b20650cb14094b0748af3425ebe3f32100e80d07911524099f5e72561741f
96 Risk Score

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 URI pointing to 'bologen.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to 'worksheets'. No scripts were extracted, but the PDF structure and embedded URI indicate a malicious intent to redirect the user to a potentially harmful external resource.

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://bologen.ru/wix?keyword=the+skin+i%2527m+in+worksheets+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408009/normal_5ffa4282eb522.pdfIn PDF document text
    • https://cdn.sqhk.co/xorunase/ieabkjf/5460433104.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372963/normal_5fc80b57c7cca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445866/normal_5fcce50d924b4.pdfIn PDF document text
    • https://cdn.sqhk.co/rujiwujik/iehcohf/guide_and_tips_for_among_us_free_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403534/normal_5ff80fafd5815.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465559/normal_5fce91bf7d919.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409799/normal_5ff0aa497248b.pdfIn PDF document text
    • http://testrun.ru/download_free_remote_monitoring_app_for_androidgtcam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455914/normal_603835cede1aa.pdfIn PDF document text
    • http://helplnstagramcontact6088758.com/29652061367r0lcv.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/sajezife/csv_to_vcf_converter_online_free.pdfIn PDF document text
    • http://magivaxinel.rf.gd/boronia_park_public_school_uniform.pdfIn PDF document text
    • http://jusowegakero.epizy.com/account_google_manager_apk.pdfIn PDF document text
    • http://gabazozota.epizy.com/54649892428.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_off0000d720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD720 5180 bytes
SHA-256: e966a5bf99588966afc3a0b5273dc38d8b1004909b20875cfa1f4ca1c30d3fdc
font_01_sfnt_off0000e8ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AC 10244 bytes
SHA-256: f1e4935e0f8a7519f40f363cdad6c9e94974c641ee203509bf4353e39d7a5e41

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