Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4cd0a92911b8cd6…

MALICIOUS

PDF

71.6 KB Created: 2021-01-25 09:42:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 851209e1c28e345731442c3553bd8c7b SHA-1: a970be1e34bba43311fd6b0ab46ffccca9b6acb2 SHA-256: d4cd0a92911b8cd6adf84368d68530aa9349e926b33bbd74fee3c5fc8d8c1981
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were directly extracted, the PDF structure and URL distribution suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wb?keyword=vegetable%20chop%20suey%20calories PDF link annotation
    • https://butevexonukuzi.weebly.com/uploads/1/3/2/6/132681970/2351219.pdfIn PDF document text
    • https://cdn.sqhk.co/gimexigerub/Ya4xrhh/occupational_therapist_near_me.pdfIn PDF document text
    • http://dsv-trening.ru/microban_24_hour_sanitizing_spray_canadan118m.pdfIn PDF document text
    • http://yoga-fitness.space/87219041687wjzfd.pdfIn PDF document text
    • https://cdn.sqhk.co/joxomawezu/Zhehi4q/murupidosajoximunaxufa.pdfIn PDF document text
    • https://cdn.sqhk.co/dokukavifig/ggWvgdr/tazimiburu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475219/normal_5fc590c481398.pdfIn PDF document text
    • https://cdn.sqhk.co/rufosopufu/hcKhfNP/telugu_detective_novels_free_download.pdfIn PDF document text
    • http://gedawuxofawu.iblogger.org/belfast_telegraph_business_reporter.pdfIn PDF document text
    • http://qwonder.space/how_many_levels_are_in_cube_surferqok8j.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xegilejefaga.epizy.com/free_trial_vpn_for_windows.pdfIn PDF document text
    • http://fopagozijudiri.epizy.com/escape_room_game_answers_level_137.pdfIn PDF document text
    • http://wuvasof.epizy.com/70996180016.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_off0000cd75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD75 5180 bytes
SHA-256: ded9cfe5f783e64f4295c85e6f781ef967398e669e5497add297a97b9782d9ff
font_01_sfnt_off0000df2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2E 10668 bytes
SHA-256: e8d385daa68f7ba5920140a44a787e6f292f8f933ff16d076605d8229c334d50
font_02_sfnt_off000103bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103BF 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

Open this report in the interactive analyzer, or submit your own file for analysis.