Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd4ef5b21fba2032…

MALICIOUS

PDF

82.5 KB Created: 2021-04-05 07:41:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 79cafce9526c63e1123d5ee2a63bef84 SHA-1: c7762708032c902c42e86e849fe87be14e4f8ea2 SHA-256: fd4ef5b21fba203202410a165976b94e95b60f428d18835fae7495416735d247
96 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 ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL points to a suspicious domain, likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it is designed to trick users into visiting a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://soxebez.ru/award?keyword=%25D0%25B1%25D1%2580%25D0%25B0%25D1%2582%25D1%2581%25D1%2582%25D0%25B2%25D0%25BE%25D1%2582%25D0%25BE+%25D0%25BD%25D0%25B0+%25D0%25BC%25D0%25B5%25D1%2587%25D0%25B0+pdf PDF link annotation
    • https://tigibivimibi.weebly.com/uploads/1/3/4/3/134344299/a7391b870e82.pdfIn PDF document text
    • http://lowusonuraku.mygamesonline.org/wall_street_journal_subscription_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492245/normal_600495699f741.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456420/normal_6044775db5136.pdfIn PDF document text
    • https://lameperitilexi.weebly.com/uploads/1/3/1/1/131164355/9318578.pdfIn PDF document text
    • http://jonipifenukiz.mygamesonline.org/sixth_grade_math_worksheets_with_answers.pdfIn PDF document text
    • http://sadinexiwa.mygamesonline.org/how_to_clean_hamilton_beach_coffee_maker.pdfIn PDF document text
    • https://kenuzoba.weebly.com/uploads/1/3/4/0/134017938/f994b0fb7.pdfIn PDF document text
    • https://letogapebo.weebly.com/uploads/1/3/5/3/135320268/604273.pdfIn PDF document text
    • https://lofokuvowuvi.weebly.com/uploads/1/3/4/3/134362742/077d59f97254fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366375/normal_604634c817f58.pdfIn PDF document text
    • https://pujuwofox.weebly.com/uploads/1/3/4/8/134882524/c6d1df3863a.pdfIn PDF document text
    • http://jepenufi.getenjoyment.net/wunelajum.pdfIn PDF document text
    • http://veruvipavopa.getenjoyment.net/ranifafotofojugo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392452/normal_60220f0cba161.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/wutogugej/how_to_fix_ps4_auto_eject.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/25897159116.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/14021933893.pdfIn PDF document text
    • http://lifobem.myartsonline.com/quotations_from_the_works_of_mao_tse_tung.pdfIn PDF document text
    • https://s3.amazonaws.com/gedexim/cheese_in_the_trap_movie.pdfIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/71530651851.pdfIn PDF document text
    • http://muwuvago.atwebpages.com/tetasavofonizelino.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/kixewokipubav.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_off0000f6d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D2 5612 bytes
SHA-256: 04f1a253d291ad0f8e973839f60687fb12140b42ebf2852e80faca45ba8d9579
font_01_sfnt_off00010918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10918 15780 bytes
SHA-256: af7448a88c1badd7aa49e2cde6aebbb468986e54e4b8c071d07dd4b1429bdb67

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