Malicious PDF — malware analysis report

Static analysis result for SHA-256 06b2f16927f079a0…

MALICIOUS

PDF

75.6 KB Created: 2021-03-09 04:47:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6f0728ecf438203658e8bf0c10344989 SHA-1: ee618c0046df05a4056e6e25c1650887efa485bb SHA-256: 06b2f16927f079a047bd6ac3f7431179bbccd19f0075e4e08fbb26960175c13c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, many hosted on disposable domains, indicating a link farm designed to redirect users. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/strik?utm_term=does+furnace+have+a+pilot+light PDF link annotation
    • https://welusagosa.weebly.com/uploads/1/3/4/3/134355806/fujebalanejij.pdfIn PDF document text
    • http://normal-id.com/philips_norelco_multigroom_5000_guard_lengthd1wi5.pdfIn PDF document text
    • http://herss.space/45459684359lhsuf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369333/normal_5fc8e5b68c715.pdfIn PDF document text
    • http://disajawamiwa.iblogger.org/tipos_de_esquemas_o_mapas_conceptuales.pdfIn PDF document text
    • http://bukezisafa.iblogger.org/learn_hangul_in_15_minutes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446017/normal_602e1d645cd87.pdfIn PDF document text
    • https://zujuwedidikaf.weebly.com/uploads/1/3/4/3/134375258/mexuge.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421630/normal_5fc9e2b25abb9.pdfIn PDF document text
    • https://lepamume.weebly.com/uploads/1/3/4/8/134882258/424081ed0670.pdfIn PDF document text
    • http://pro-komp-master.website/nozukasuvavcsq60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385011/normal_6040ad6a6e315.pdfIn PDF document text
    • http://zeropium.com/instructions_for_sony_dream_machine_auto_time_setopbw2.pdfIn PDF document text
    • http://lapuxuzogu.22web.org/corning_cell_counter_manual.pdfIn PDF document text
    • http://nujatofu.22web.org/online_graphic_design_courses_with_certificates_south_africa.pdfIn PDF document text
    • http://doctorzlo.com/28842553543a2aiw.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/wonumafubij/foxajus.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/41563247962.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/john_deere_d170_deck_parts_diagram.pdfIn PDF document text
    • http://refaruzevogot.epizy.com/91717914086.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/ppt_aircraft_hydraulic_system_full_report.pdfIn PDF document text
    • http://dobejul.epizy.com/ultimate_ninja_blazing_mod_apk_2019.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_off0000ea3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3D 5336 bytes
SHA-256: f247230396304835ae5b50908fccae86a8a92fb8e66120f4aa75f2fa1fba28e3
font_01_sfnt_off0000fc76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC76 10724 bytes
SHA-256: 99f62238c89304f9c53d63d6ce641365400e29ec1d48b03887787bfb52818b67

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