Malicious PDF — malware analysis report

Static analysis result for SHA-256 b02cfb5ebd3d838c…

MALICIOUS

PDF

67.0 KB Created: 2021-02-26 15:23:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7058ab0f621b839d48542af9244c2f4e SHA-1: 533343d4c5b5fa3c72f7fc7003fa33336e33628a SHA-256: b02cfb5ebd3d838cfc1250ab7606232ad9f7ac40e598f123c95134d0f24cf155
154 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://yafferge.ru/wix?keyword=avengers+tv+theme+ringtone In PDF document text
    • http://nasufulorejuwe.mywebcommunity.org/19841444725.pdfIn PDF document text
    • http://wijetaz.mypressonline.com/what_is_a_business_case_summary.pdfIn PDF document text
    • https://cdn.sqhk.co/gisatajofo/jcXh4Xf/83712111195.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386593/normal_5fe75047b385c.pdfIn PDF document text
    • https://cdn.sqhk.co/bugolajoxodu/jcr7iac/dobosepodoxel.pdfIn PDF document text
    • https://cdn.sqhk.co/kevejonob/gihcttg/10008887152.pdfIn PDF document text
    • http://nekuwagibajese.getenjoyment.net/what_is_the_cub_scout_law_and_promise.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/zetituri/indented_business_letter_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/asbestos_removal_procedures_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/what_is_knowledge_management_software.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/friend_like_me_aladdin_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/piragefowojagimaxesis.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/16900959899.pdfIn PDF document text
    • http://sazasewugekupej.onlinewebshop.net/zuvusuv.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_off0000cd38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD38 4908 bytes
SHA-256: 8f12c43ceb8649eb2b354294eb4e9426cc89c049d921cfca1ad6a3b66d561573
font_01_sfnt_off0000ddcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCF 9672 bytes
SHA-256: cf55203e13b485b02864fac83e01cebdd93245b0c05506701c92b01fd1be984d

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