Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed2b2a581b1d3bfb…

MALICIOUS

PDF

78.4 KB Created: 2021-06-06 14:09:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 68e17f65e907e64abc11bb7608657050 SHA-1: 50f7478fceb72d0f2db432f96164ca5134f5cd04 SHA-256: ed2b2a581b1d3bfb8ded89f5dfe19dc6c19c9dae77784f80109779a1179b2275
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal or Forge Credentials

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier. It exhibits characteristics of a credential harvesting lure, specifically targeting multi-factor authentication or one-time codes. The embedded URL points to a suspicious domain, likely serving as part of the phishing infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://mezovuduw.ru/123?utm_term=free+auto+tune+without PDF link annotation
    • https://maviwodoke.weebly.com/uploads/1/3/1/6/131606431/xanabu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408864/normal_6025b644b93ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415962/normal_5ff9819def818.pdfIn PDF document text
    • https://lutapusudifo.weebly.com/uploads/1/3/1/0/131070527/5579119.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419430/normal_6000237911408.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://paderukut.pbworks.com/f/how_often_do_i_need_to_empty_my_septic_tank.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ea7b475-5c02-4a31-8acf-0183644c321c/craftsman_ys4500_riding_lawn_mower_blades.pdfIn PDF document text
    • http://wurutaw.pbworks.com/w/file/fetch/144508173/it_program_manager_interview_questions_and_answers.pdfIn PDF document text
    • http://buxozobodu.pbworks.com/f/adobe_acrobat_7_professional_keygen_paradox.pdfIn PDF document text
    • http://mifimoruzuwo.pbworks.com/f/47132085588.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13d569ab-aca7-48f7-a598-f36738c25a50/mojujanixitusi.pdfIn PDF document text
    • http://pamotekegopa.pbworks.com/f/mabigubalujuzufar.pdfIn PDF document text
    • http://xagewip.pbworks.com/w/file/fetch/144722433/ableton_live_10_suite_serial_number_generator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2195d4ee-9ddd-4865-b969-6a24a43e7e62/68624687718.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/679c7714-df83-4c31-a457-a9750dba302c/jack_reacher_2_full_movie.pdfIn PDF document text
    • http://bezagodo.pbworks.com/f/the_house_on_mango_street_what_sally_said_summary.pdfIn PDF document text
    • http://sulegiwi.pbworks.com/w/file/fetch/144621780/30408261755.pdfIn PDF document text
    • http://gazoridixilu.pbworks.com/w/file/fetch/144524211/rigefujoxeneduwefif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35862ff3-f54a-484f-ac6a-f39c030f6035/67697276526.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_off0000f4b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B9 4612 bytes
SHA-256: da2600aab281462c191eec285d94700fd7f07cca72a9ace9d26db69d86eb8e8b
font_01_sfnt_off0001046f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1046F 11716 bytes
SHA-256: 239b8797eeea82b7ff1fd5b5072402b9b7ea8fa8cecbce5bbcca6af95d04e908

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