Malicious PDF — malware analysis report

Static analysis result for SHA-256 287e9d9e8f5824d5…

MALICIOUS

PDF

82.4 KB Created: 2021-05-06 05:12:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: a15a81e2474a9797755b0c726176c21a SHA-1: 3fc47d9fc6fb917f5b84a2809cfc86e887467fa9 SHA-256: 287e9d9e8f5824d5b7e536dfe12ff14f85645da18f4912d46f791e7c57e0a965
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating it is likely a phishing or trojan delivery mechanism. It contains numerous embedded URLs pointing to various domains, suggesting a link farm or redirection scheme to host malicious content. The PDF's structure and the presence of external URIs strongly suggest an attempt to redirect the user to potentially harmful websites.

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://baarspo.ru/strik?utm_term=iso+31000+risk+management+pdf PDF link annotation
    • http://baltika-trans.com/is_rock_band_on_xbox_oneb52lb.pdfIn PDF document text
    • http://ukranews.icu/jabulozogusibisoxgnqje.pdfIn PDF document text
    • https://motanaweda.weebly.com/uploads/1/3/4/3/134316912/napup_tesofaruf.pdfIn PDF document text
    • https://pukegivox.weebly.com/uploads/1/3/1/8/131856392/2585797.pdfIn PDF document text
    • http://reduslim-shop.website/59096129233t9sgl.pdfIn PDF document text
    • http://bridgecommerce.com/the_attraction_code8bemp.pdfIn PDF document text
    • http://topdiscount.pro/ceinture_orange_krav_magafm8w5.pdfIn PDF document text
    • http://idealica-ufficiale.site/miku_hatsune_episode_1hixe5.pdfIn PDF document text
    • http://figedizizexi.22web.org/apics_supply_chain_management.pdfIn PDF document text
    • http://timecodes.net/404830804135hg61.pdfIn PDF document text
    • http://ryursew.space/font_hanacaraka_palsu1j7r0.pdfIn PDF document text
    • https://wolunogejafijut.weebly.com/uploads/1/3/4/6/134649672/wutafusinufituvusap.pdfIn PDF document text
    • http://insta-sale.site/adobe_indesign_tutorial_in_tamil8bncp.pdfIn PDF document text
    • http://urott-hu.com/zebomudoroscxlgp.pdfIn PDF document text
    • http://zespodsvetkoy.site/74361767522qw64v.pdfIn PDF document text
    • http://senteber.site/what_does_it_mean_to_have_scheduled_maintenance5vsf9.pdfIn PDF document text
    • https://givigifug.weebly.com/uploads/1/3/4/8/134858651/soleli_gisowapasuzujas_xisel.pdfIn PDF document text
    • http://petersikdar.com/blood_pressure_by_age_calculator_australiabn64t.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://godutugogusapa.rf.gd/how_do_i_program_my_directv_remote_to_control_the_volume.pdfIn PDF document text
    • http://ladiretivivanij.epizy.com/riturijon.pdfIn PDF document text
    • http://jumebesatupa.epizy.com/que_es_enfermedad_anemia_falciforme.pdfIn PDF document text
    • http://tizebowikono.rf.gd/ccleaner_app_for_android.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_off0000f569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF569 5476 bytes
SHA-256: 0e4325dc307984efbf1acae643d559bed07ec284bff786961effa1d21a28a74c
font_01_sfnt_off000107e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E6 11324 bytes
SHA-256: 1c63cf08e8f9f30125be9e1889e260161200d7affae2a4df0129d2ebf8160217
font_02_sfnt_off00012e2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E2A 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3