Malicious PDF — malware analysis report

Static analysis result for SHA-256 e833b79719cb935c…

MALICIOUS

PDF

81.6 KB Created: 2021-04-23 13:45:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f0cbdd618fe3c05b5f346eaee8480b7f SHA-1: a93ef1fc33f5e8bde1a331fde097fbd512af31cc SHA-256: e833b79719cb935c086b7e0e92e13550013ddf7fff9008aeb0801f21323c0be9
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating it is a phishing or trojan delivery mechanism. It contains numerous embedded URLs, many pointing to disposable domains, and one specifically lures users with a 'Dwarf fortress adventure mode' theme. The presence of multiple external URIs suggests an attempt to redirect the user to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • 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://jumiwimov.ru/strik?utm_term=dwarf+fortress+adventure+mode PDF link annotation
    • http://otshelnik.net/66894889248g7zt2.pdfIn PDF document text
    • http://voiprormul.xyz/jisasineyw5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367680/normal_604b3af5e1ebc.pdfIn PDF document text
    • http://momentikshop.space/peerless_2300_transaxle_manualek0no.pdfIn PDF document text
    • http://formverifiedbadge.com/73573490321eyexz.pdfIn PDF document text
    • http://runmasten.online/mabowujekaperovaden0hwa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473890/normal_5fcbdd9ba0ca6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410190/normal_604d0d622c55d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481999/normal_5fc7d6325c942.pdfIn PDF document text
    • http://trikolor.site/wuwexonopivoifqu0.pdfIn PDF document text
    • http://fitdieta.com/why_wont_my_gas_oven_not_stay_lit1ejpk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481836/normal_60480c1cb52a3.pdfIn PDF document text
    • http://eagleaff.com/what_is_the_molecular_structure_for_o2ryna6.pdfIn PDF document text
    • http://edaruzal.xyz/clinical_pharmacy_walker32o8q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389085/normal_5fe8b1d2ab730.pdfIn PDF document text
    • http://soldatskaya6.ru/54863479859g0m97.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420760/normal_5fcb05a79d7a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375077/normal_600cd1fe654a6.pdfIn PDF document text
    • http://lnstagramcopyrighthelps.com/the_american_dream_by_edward_albee_themesfzoya.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366316/normal_60563b0e53d49.pdfIn PDF document text
    • http://reabook.online/jipodufetodatatobmkxba.pdfIn PDF document text
    • http://abanca-electronica.com/80270613114ugku3.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/wozoxub/84991472821.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/23779242126.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/what_is_wd_tv_live_media_player.pdfIn PDF document text
    • https://s3.amazonaws.com/dosipive/73668305257.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/19508974290.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_off0000f65b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65B 5172 bytes
SHA-256: 2dfb410e6585545f65b3e0aee35c1b675dcc5693392e2cf9132af88d88ff1dc8
font_01_sfnt_off00010800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10800 15792 bytes
SHA-256: 4a92478a8b593ecda9fc1acce781a3f21106001f781305124bc2c17e7347e9f1

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