Malicious PDF — malware analysis report

Static analysis result for SHA-256 93757d00f8b25d7e…

MALICIOUS

PDF

69.4 KB Created: 2021-03-31 14:35:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 89f22e4caba9a9cb8c9cfdedc7a86bb3 SHA-1: 27b9af2117d833fad5e35a7fbbea1ab262c63dbd SHA-256: 93757d00f8b25d7ed3a40cccbd55cdc9232499f81c8a1b60acf27b0beb320a7c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://soxebez.ru/strik?utm_term=el+libro+de+thoth+aleister+crowley+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4455208/normal_60465dda5a600.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403936/normal_5ffbfd5d19a44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482228/normal_603fdab2ef5ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368486/normal_5fe793a9e9668.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412900/normal_6028a3bf1e928.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415527/normal_601cb096a5146.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387565/normal_6021f648e53be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481852/normal_605ff7aa03260.pdfIn PDF document text
    • http://jidugisukeranav.iblogger.org/quantum_physics_quiz_questions_and_answers.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/sinadi/team_leader_housekeeping_job_description.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/what_does_god_say_when_you_feel_alone.pdfIn PDF document text
    • http://wamamun.rf.gd/group_personal_accident_insurance_policy_sbi_form.pdfIn PDF document text
    • http://towupew.epizy.com/kawimipewuv.pdfIn PDF document text
    • http://xorifexudizig.rf.gd/categorias_gramaticales_y_ejemplos.pdfIn PDF document text
    • http://kopujujezi.rf.gd/77757152436.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/darkest_of_days_save_game.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/mugisedekobowit.pdfIn PDF document text
    • http://nabesazuxipuf.epizy.com/2021_toyota_camry_se_nightshade_black.pdfIn PDF document text
    • http://towuvoti.epizy.com/96817370272.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/jorewanu.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/robert_greene_the_48_laws_of_power_download.pdfIn PDF document text
    • http://gejuzimeru.rf.gd/nodijozisaxamadelamawa.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_off0000cc53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC53 5536 bytes
SHA-256: 0dbe24718801c6c0a7e136e820a3a2a0dc14bec44e8eb4fd342d0d6699828126
font_01_sfnt_off0000df30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF30 11972 bytes
SHA-256: 4c7f7ace8781dc36d05858e5d21a7a9ee4c3320f4a6f56adae2682afb11e2d04

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