Malicious PDF — malware analysis report

Static analysis result for SHA-256 0801b4c8152704fd…

MALICIOUS

PDF

81.4 KB Created: 2021-03-24 09:12:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 965d0e26ad1a101781af087ba68c2da0 SHA-1: 22e39f936c26c1821020e20e576813312876978e SHA-256: 0801b4c8152704fd0ae268f027c1780566a9e480b2f36c0a9ab7eaa488e31b54
266 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1071.001 Web Protocols T1553.005 Security Software Tampering

This PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm designed to redirect users to potentially harmful content. It contains numerous external links, some pointing to disposable hosting, and includes instructions to disable security software, indicating an attempt to bypass defenses and facilitate further compromise. The document's content and structure strongly suggest it's part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://lozipotod.ru/award?keyword=3d+pdf+maker+for+revit+crack PDF link annotation
    • https://lomofoxagut.weebly.com/uploads/1/3/4/5/134524577/8cd4833df8.pdfIn PDF document text
    • https://gitutibilaralib.weebly.com/uploads/1/3/1/3/131384503/02553d5295a.pdfIn PDF document text
    • http://zokoxakabu.medianewsonline.com/steps_of_evidence_based_medicine.pdfIn PDF document text
    • http://makelemeg.mygamesonline.org/gifitikevawolixa.pdfIn PDF document text
    • http://trackcreditscore.info/fikategadaba60ciu.pdfIn PDF document text
    • https://nimidakotogala.weebly.com/uploads/1/3/0/8/130874585/a02141a8132.pdfIn PDF document text
    • http://detonic-official.website/xojurunonleoo.pdfIn PDF document text
    • http://bluebadgeapproval.com/44754112246nx5p6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b79f7c8-7903-4cd1-951b-612c5f57d01d/22848560656.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02275660-0a83-4c46-bc83-0e508c997987/32654476333.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06d03241-9174-467d-ae16-184096149cbc/bissell_proheat_power_steamer_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/350a559f-92dc-4688-8359-a33f0057a72e/siwisexutajemagomirurik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9f100d3-b934-43f7-b4e2-b509e0e05081/51301458391.pdfIn PDF document text
    • http://xoxekojut.onlinewebshop.net/kazebux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c2d2670-b3a9-4a75-8e31-57abf460310b/gotiduwexijukudovif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d20d1f4-9279-4cbc-8065-148569d49879/hp_photosmart_c3180_paper_error.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ac14079-1a9b-4111-b579-87e68967be7c/apc_back-ups_xs_1300va.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48731693-211a-439e-901a-19d7a90200db/jepomipubipibiwevufufur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4e5b89e-61a4-4c60-a5fc-ac5f127033fc/how_to_read_electrical_drawing_and_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcafbc7c-d097-42f5-92c0-c157ce7c49a4/kurixiwawemedufozobaje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d69437c5-bdd7-4b3b-8137-fe1cfb469bff/94860641540.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_off0000f431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF431 5284 bytes
SHA-256: 32290f290dc677ed9f4b36164a9ee9c56bcb08300daff29e55f40968d2c45e92
font_01_sfnt_off0001061c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1061C 1592 bytes
SHA-256: 236c006f8ac502fe18ab0d85e79ad2d5ec9825334f2d94bc7ca77080c2049286
font_02_sfnt_off00010e3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E3B 11744 bytes
SHA-256: 2b2161aa31b343e6e1a4e302a01b6ddb5cf4606469b8c34db83f68ec2b1a1b78

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