Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b33e0d0dc98f029…

MALICIOUS

PDF

66.6 KB Created: 2021-02-09 16:18:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: d6c2ad56541477834ec11c227e9e1208 SHA-1: cf8eb27eb3e70d8cbbe220258cb0a82d36836cde SHA-256: 3b33e0d0dc98f02902ca7ec918d5db7f0289c94d318384901a8cdc6752d00802
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://yafferge.ru/shook?utm_term=maze+runner+3d+mod+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4448539/normal_5fe8e623614b7.pdfIn PDF document text
    • https://sinukofulav.weebly.com/uploads/1/3/4/6/134634738/8624216.pdfIn PDF document text
    • http://sberbank.link/knockout_pressure_points_chart9921c.pdfIn PDF document text
    • http://gramnews.xyz/weekly_meal_planner_freesclhi.pdfIn PDF document text
    • https://jupepirime.weebly.com/uploads/1/3/4/3/134313464/soporaduxawen-mijejudidakizuf-rowaz-jefek.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393362/normal_5fffaa149be41.pdfIn PDF document text
    • https://sulezesolujoseg.weebly.com/uploads/1/3/1/4/131452841/nenuvekadilufa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463791/normal_6002b7855e967.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409826/normal_5fd3cd221b907.pdfIn PDF document text
    • https://fakebomazeb.weebly.com/uploads/1/3/1/4/131453402/vetevas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379483/normal_602199da6b587.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367922/normal_5fef7af39fafa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/fuvixaxowas.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/sway_app_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/phone_answered_remotely.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_off0000c82b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC82B 5180 bytes
SHA-256: c68620d3c4fd1b00a71aa29d295259a20bedff16155b0201933355974e6f3e89
font_01_sfnt_off0000d9cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9CD 10532 bytes
SHA-256: 539cba2ad8dfd85ab1408129ba5417f158c0dcb4e2a526538a6912855819bac0