Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb3bc147ea79369c…

MALICIOUS

PDF

68.9 KB Created: 2021-02-11 20:31:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 23a75f98dc31f6eb93528ec55f23d4aa SHA-1: 2c913c70ec1ebc48799427a5471e7c52a7ac32c7 SHA-256: bb3bc147ea79369c50a9b6a92ba4abf866a9b3cee8d239306f3835e6d4292982
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://crophysi.ru/wix?keyword=stateless+nation+definition+ap+human+geography In PDF document text
    • http://iwhite.space/risesobug5amau.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389366/normal_5fdf7e6e35b08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480595/normal_60235b2408ab6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421944/normal_5fdc601a26734.pdfIn PDF document text
    • http://teksalon.xyz/13948351908bko4x.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451563/normal_5fee744e7a54e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475737/normal_5fff521b196ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451941/normal_5fe04118c99bb.pdfIn PDF document text
    • http://jafetezaki.iblogger.org/common_core_sheets_money_word_problems.pdfIn PDF document text
    • http://closemaze.com/faith_family_medical_brownsville_tnraedl.pdfIn PDF document text
    • http://italdom.fun/shin_megami_tensei_gba_rom_englishae2dj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xutarefes.epizy.com/fitumizaze.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/sound_effects_free_for_video_editing.pdfIn PDF document text
    • http://nekogepi.epizy.com/neonatal_resuscitation_guidelines_nz.pdfIn PDF document text
    • https://s3.amazonaws.com/zubata/desierto_informacion_en_ingles.pdfIn PDF document text
    • http://susejukeb.epizy.com/prognosis_filariasis.pdfIn PDF document text
    • http://fazafowunop.epizy.com/kerrville_tx_accident_report.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/7639394401.pdfIn PDF document text
    • http://zunuwovadete.epizy.com/ap_calculus_bc_logistic_growth_worksheet.pdfIn PDF document text
    • http://wadusobu.rf.gd/lady_bird_deed_template_florida.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/kugonavixu.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_off0000c6fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6FC 5660 bytes
SHA-256: 3b5e0cdab77c28ad2f0aa5af8c238dc2d6560871ed860086d4d707767c6c89da
font_01_sfnt_off0000da10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA10 1716 bytes
SHA-256: c0e39f44321a474cc328806e737293db5bfd2873d0430c567f64257ef24eb06f
font_02_sfnt_off0000e29b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29B 10120 bytes
SHA-256: 9f00b45cf610e9d6ef120b3d3967c378e89e6b473142632fab4e5d28ba8ab7eb