Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b7565a166809ad0…

MALICIOUS

PDF

75.9 KB Created: 2021-04-21 01:49:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f5bf476f88ade57ebf56801910ac764e SHA-1: 2f3cd1fb691ad731b894b7da592ca706f169e8d7 SHA-256: 0b7565a166809ad0298c5be58e7885153a177f52e5d36cff34117f9da3d6756e
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The primary lure appears to be a search result for a common query, directing users to a suspicious domain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/strik?utm_term=how+long+does+it+take+to+fall+asleep PDF link annotation
    • https://xuwovovap.weebly.com/uploads/1/3/1/6/131607152/lurozovu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381104/normal_5fd14f18cb0c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370542/normal_5fc6cd59f3bb4.pdfIn PDF document text
    • http://tisorojeta.iblogger.org/betigijixobixawupiwa.pdfIn PDF document text
    • https://matatotasewitux.weebly.com/uploads/1/3/1/3/131384286/883dbc.pdfIn PDF document text
    • https://cdn.sqhk.co/suvotoruwot/gegjhh0/weather_appleton_maine.pdfIn PDF document text
    • http://detomebokiv.iblogger.org/ganesh_atharvashirsha_gita_press.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413468/normal_606d5a6fc05f5.pdfIn PDF document text
    • https://cdn.sqhk.co/ludozenidi/6gg0ihx/69540793256.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443804/normal_5fcd3e8835c33.pdfIn PDF document text
    • https://cdn.sqhk.co/lokutibu/Z9GjjBk/44349819769.pdfIn PDF document text
    • http://visobuwulogej.22web.org/sig_sauer_p229_legion_compact_concealed_carry.pdfIn PDF document text
    • https://gabofulonu.weebly.com/uploads/1/3/4/7/134730366/fubisoneremejo-timamigez.pdfIn PDF document text
    • https://vekosafadowob.weebly.com/uploads/1/3/4/8/134868088/vajemulevuv.pdfIn PDF document text
    • http://fuluwube.22web.org/senepinekunobapawe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gajutar.onlinewebshop.net/core_java_coding_interview_questions_and_answers_for_freshers.pdfIn PDF document text
    • http://folalolitawos.epizy.com/29428055710.pdfIn PDF document text
    • http://zenakezogutomu.onlinewebshop.net/65695410747.pdfIn PDF document text
    • http://rinurevidipefiv.rf.gd/hyundai_creta_features.pdfIn PDF document text
    • http://zakagoxufi.epizy.com/mufuv.pdfIn PDF document text
    • http://jetotajasavesi.atwebpages.com/arbitration_act_1996_bare_act.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_off0000ed82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED82 5228 bytes
SHA-256: 5f2f5bd6d0daa4a14b17e279a1607a4b347b706a774de6d294ee4ad1520b5e83
font_01_sfnt_off0000ff7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7F 10332 bytes
SHA-256: dd1c4fe5534153afc537e53e40b14b50de4bb39fb249417b4d535ef1a90cd976

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