Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e44fa9be2a6ab6f…

MALICIOUS

PDF

75.7 KB Created: 2021-04-05 20:01:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4903156debe38afe2c434501438bfb79 SHA-1: 21b7e3cbaf36eca7e1a33862e25ced17e1337737 SHA-256: 6e44fa9be2a6ab6f248b0493746de8576d72e5b040f60f1160401cdc468039dd
166 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, and one URL is specifically crafted to appear as a software download lure. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may be part of a multi-stage attack where the actual payload is hidden and requires a password, likely to evade initial scanning.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://seumenha.ru/strik?utm_term=java+8+free+download+for+windows+32+bit PDF link annotation
    • http://olivamebel.com/acr_birads_atlash159l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496577/normal_60544a8a57790.pdfIn PDF document text
    • http://constructionhouse.info/vijasatwowqz.pdfIn PDF document text
    • https://kidubaviputotej.weebly.com/uploads/1/3/4/5/134520398/7461557.pdfIn PDF document text
    • http://delaem-sami.online/bachelor_degree_in_information_technology_south_africab51jl.pdfIn PDF document text
    • https://cdn.sqhk.co/wavafinudow/fgfCjdh/cv_template_for_pharmacist.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408851/normal_5fe27f6169b83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418197/normal_6011928624e6f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496005/normal_60093b457552e.pdfIn PDF document text
    • https://cdn.sqhk.co/weruvewo/fEwihio/survivalcraft_2_pc_crack.pdfIn PDF document text
    • https://cdn.sqhk.co/xuluriwu/cqNSrjs/gijudixivufep.pdfIn PDF document text
    • http://discount50.pro/what_is_a_specific_purpose_statement_for_a_persuasive_speech5g3fo.pdfIn PDF document text
    • https://cdn.sqhk.co/viwitukaz/fidgjav/aion_2_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/patemugimej/Rha2oie/corrugated_sheet_standard_width.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444875/normal_5ffe0a2a32494.pdfIn PDF document text
    • https://tixosame.weebly.com/uploads/1/3/4/5/134523113/4995930.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1b60544-6050-4971-80ec-0cac18ae4a79/vapagabaza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/754ab720-7429-44df-9492-c7d4783bdf66/difference_between_linear_and_nonlinear_regression_in_data_mining.pdfIn PDF document text
    • http://palojolasorut.rf.gd/freeman_guerrilla_warfare_unit_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2430fb0-5dc1-49d3-8f33-28bed6eb4c54/call_of_duty_modern_warfare_3_glitches_xbox_360.pdfIn PDF document text
    • http://pezigofujisi.rf.gd/specialized_business_information_systems.pdfIn PDF document text
    • http://bemeridalazobox.epizy.com/principles_of_access_cavity_preparation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d254aa63-24f8-45ad-baab-02f4b5e3fab3/hp_deskjet_3052a_connect_to_wifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0ea1946-7b37-4258-a3bc-e7e1e6a13967/homedics_lithium_electronic_scale_battery.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_off0000eb70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB70 5672 bytes
SHA-256: 0eb38fc1377f1acc977f47a4d35f2f03eac226c5cc57d5f245b29050b511b5f8
font_01_sfnt_off0000feea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEA 10000 bytes
SHA-256: 5194981be6299d37a20c81b61b91782f5c2b949846d745bc3e34b5dd67b9045b