Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c062e7d27f049b1…

MALICIOUS

PDF

87.2 KB Created: 2021-03-14 13:18:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c116c1bafd79f778975c5c55346c9d9 SHA-1: 962d930faa9803babb13e76d0bbd22eab27cae61 SHA-256: 4c062e7d27f049b1bcc6b9b4957926950809a0de1792e0c7f53d2801ad41b3b4
166 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is part of an advance-fee scam, specifically a lottery or parcel delivery lure. It embeds multiple external URIs, including one pointing to a link farm on disposable hosting, suggesting an attempt to redirect users to malicious content. Although no scripts were extracted, the overall structure and embedded URLs strongly suggest a phishing or scam attempt.

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://pelibifir.ru/award?keyword=chapter+3+research+design+and+methodology+pdf
    • http://lebanage.iblogger.org/the_longman_anthology_of_world_literature_2nd_edition_volume_d.pdf
    • http://mowogaw.mypressonline.com/doderi.pdf
    • http://nokasosozigof.mypressonline.com/40584273794.pdf
    • http://lifolibi.sportsontheweb.net/paviwejukanil.pdf
    • http://visionnew.xyz/automobile_automotive_mechanics_technology_technician_salary5dl1f.pdf
    • http://vefuxeromuriwir.iblogger.org/do_garbage_disposals_have_a_reset_button.pdf
    • http://zugugalepew.mypressonline.com/bijamilaponumuw.pdf
    • http://mokaxizekebade.scienceontheweb.net/applied_multivariate_statistical_analysis_johnson.pdf
    • http://white-x.fun/currency_trading_app_androidlc92l.pdf
    • http://nopadejitakuf.22web.org/xibof.pdf
    • http://tukazijib.22web.org/manager_position_job_interview_questions_and_answers.pdf
    • http://dominis.xyz/taditarizol2vcvn.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pirofopafu/rulagaxelefeviwi.pdf
    • http://gefuxexo.epizy.com/cashflow_pc_game_free_full_version.pdf
    • http://toxukofotu.rf.gd/allison_transmission_3000_rds_service_manual.pdf
    • http://pulitisagot.atwebpages.com/61845178670.pdf
    • http://forezepolutaju.onlinewebshop.net/tipos_de_funciones_lineales_cuadraticas_etc.pdf
    • http://badokelo.rf.gd/blastoid_transformation_follicular_lymphoma.pdf
    • https://s3.amazonaws.com/tiduro/ap_seminar_stimulus_material_2019.pdf
    • https://s3.amazonaws.com/moduxanakuri/thule_roof_rack_parts_near_me.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011670.bin
55950a4899dc98034f5bcbe2214afc2b42614e574f0bcf74bb44b28db4837069
pdf-font-stream PDF embedded font (sfnt) at offset 0x11670 5740 bytes
font_01_sfnt_off000129d8.bin
81fb172116d1aa596f02e3da4dac0fe76f316ec3491b2b2d638e0323009ddcf4
pdf-font-stream PDF embedded font (sfnt) at offset 0x129D8 11024 bytes