Malicious PDF — malware analysis report

Static analysis result for SHA-256 84b78039be8077bb…

MALICIOUS

PDF

71.0 KB Created: 2021-03-04 01:01:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 11b8e0d0d4b2990f1243a128b27aac20 SHA-1: 595a87b8858e5a8832c0901d0ccb2e1e374523ad SHA-256: 84b78039be8077bbdef2e28b9f5cc73ae82ea224216a48fcd664ec96e1dc4d69
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/wb?keyword=indian%20air%20force%20ranks%20and%20salary In PDF document text
    • https://cdn.sqhk.co/nakunadubux/bpQogg6/city_taxi_bike_driver_3d.pdfIn PDF document text
    • http://sumomubidisuwo.iblogger.org/all_time_favorite_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/3hdtwmY/nisoresax.pdfIn PDF document text
    • https://cdn.sqhk.co/sesumaku/XlQljhy/playtube_ios_app_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460706/normal_5ff2adb2a8ccf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408460/normal_602459084bdd7.pdfIn PDF document text
    • http://wozilimesiz.mypressonline.com/what_does_it_mean_to_dream_about_zombie_apocalypse.pdfIn PDF document text
    • http://sexugaweguko.iblogger.org/ket_exam_listening_answer_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/vadavenaw/CjcbEif/coloring_by_numbers_pages.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367959/normal_5fe8500cea069.pdfIn PDF document text
    • http://bewudup.iblogger.org/rujamozola.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wekolaxoretewov.epizy.com/rozajufowipa.pdfIn PDF document text
    • http://fofifalog.rf.gd/automatic_transmission_vs_manual_transmission_ppt.pdfIn PDF document text
    • http://ruxurosagogaru.epizy.com/billie_s_bounce_bb.pdfIn PDF document text
    • http://nesasodatujor.epizy.com/get_my_life_together_quotes.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_off0000d917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD917 5116 bytes
SHA-256: b1d2e608806380b9a8f16de6d71cd612d937f65e1f6312623cb0956ca5a2a803
font_01_sfnt_off0000ea9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9D 10828 bytes
SHA-256: cd9b87121bf13104c2c371a543a07f43e3804ebb840d1a517f2e0db68be6482d