Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fddb6c2bf30d9f4…

MALICIOUS

PDF

80.6 KB Created: 2021-03-18 13:56:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e37a89c55c864d74c0edbcb540c31035 SHA-1: c4a1ed5f47a200ad3585deed86b7a95b68484737 SHA-256: 5fddb6c2bf30d9f44343873aefe0ebb4123529c1d5acf0c849dcb0190fef71f6
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dafemum.ru/123?utm_term=partners+authorisation+letter+format+for+gst PDF link annotation
    • https://cdn.sqhk.co/sejixikerut/pbihhgc/60782576297.pdfIn PDF document text
    • http://huaweistoreukr.xyz/mbti_test_free_online_redditz2139.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499283/normal_5fe7d37e19494.pdfIn PDF document text
    • http://luchdobro.site/dogopigakiditeboduwuwotiakgm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410433/normal_60344b02c2a42.pdfIn PDF document text
    • https://cdn.sqhk.co/tebefaravuz/jcsjaAL/shogun_hibachi_grill_sushi_folsom_ca.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvisisitinu/ailWshS/oklahoma_h._e._r._o_program.pdfIn PDF document text
    • https://cdn.sqhk.co/jujejorule/dAuyjjm/prezi_templates_free_medical.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/e514a4a9-731c-4979-a769-c46e5822e09b/mechanical_engineering_salary_in_kenya.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/shs_reading_and_writing_curriculum_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/61169286774.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/498079f9-728b-49db-ab18-0fd74def5384/how_to_write_a_due_diligence_report_for_investment_purposes.pdfIn PDF document text
    • http://kewivifonawati.epizy.com/medical_virology_free.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/42653990903.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fd5bd7e-8c46-4351-bfd0-54c8c3a1bdfc/big_green_egg_large_nest_price.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/xaganimaxi.pdfIn PDF document text
    • http://dujazenemelix.epizy.com/ruzupavusigugikomisukox.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/denid.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4A 5184 bytes
SHA-256: fedd8b58767c2f49be3a2fcc0efb557b6a956ba97b7cb925061708b5f0701858
font_01_sfnt_off0000fbbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBF 11000 bytes
SHA-256: 5ccfb506aaa55f571fded40f30c833728015a2190ae310f382b891e5202faa9b
font_02_sfnt_off00012166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12166 5404 bytes
SHA-256: b075155b158c9e6ce75d7ecb327131f3f7d8aa0195efd6b7b878048a7c3166e7

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