Malicious PDF — malware analysis report

Static analysis result for SHA-256 791c37b7a678cfa0…

MALICIOUS

PDF

103.1 KB Created: 2021-03-28 09:03:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2eaf8b14984e964ec4f9143ebff649d6 SHA-1: 58e3373c45bca4e8acaba1c4d2c46f68e78a6ba6 SHA-256: 791c37b7a678cfa05ab80691db14eb4523348e9ebca648d2a9d1d87eb7df2c2e
96 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 embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/wix?keyword=54+543+pill+expired PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4365584/normal_60011ec52b3e6.pdfIn PDF document text
    • http://delabozaxexiris.getenjoyment.net/85350686059.pdfIn PDF document text
    • http://sijubuwejipamun.mywebcommunity.org/jeronodifokomor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415937/normal_6007aa1cc4a5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474218/normal_6018dad740b18.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529095/normal_5fde05187b6d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366024/normal_6017beedc800c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368989/normal_60038c7c26a97.pdfIn PDF document text
    • http://desokore.medianewsonline.com/major_issues_facing_higher_education_today.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370767/normal_5fd14c656c09e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450147/normal_60039812cda25.pdfIn PDF document text
    • http://nijaxubazaziw.mypressonline.com/ridugimoraka.pdfIn PDF document text
    • http://liwitesuzemumex.sportsontheweb.net/cost_of_living_comparison_worldwide.pdfIn PDF document text
    • http://bukuxojunuz.mypressonline.com/actus_hominis_dan_actus_humanus.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484355/normal_5fcbc7a077d06.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zupitatip.atwebpages.com/harry_potter_4_movie_quiz.pdfIn PDF document text
    • http://wudemexa.myartsonline.com/dewubexoxawokenuxedefuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e49f5cb6-14da-4271-8743-f73e423a31a9/51815731566.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a82d30f-6f23-4cf6-b793-d81b4192ff55/zozujusukam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b49eff6a-4f3e-42de-897b-e065a9af6c37/what_is_momentum_call_in_stock_market.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb0b3aad-c03a-413b-9515-fdfdef67e55f/sweat_equity_agreement_template.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_off00014907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14907 4408 bytes
SHA-256: b229800b6cf913afda0c4551f342b77901666c88550929b9bb353f3376b47dc5
font_01_sfnt_off00015807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15807 12204 bytes
SHA-256: 66ddc6e7eaa6da14a9669b696afd60592b8c0d72fdd835ce71b5015bf233a8e0
font_02_sfnt_off0001816b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1816B 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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