Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6050e267c088d1e…

MALICIOUS

PDF

74.8 KB Created: 2021-03-12 03:01:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 0e5041bef67c7de2139c353b0887baa3 SHA-1: 52bda8ace3b01f68fe44bb377ce564a301b0eb9b SHA-256: b6050e267c088d1ee77bb7f9da09c858f282f2c59e68cc50cfa60d91ee95064c
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains references to 'Bible concordance' and 'wkhtmltopdf', likely a lure to disguise the malicious intent of directing users to external sites.

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://resalured.ru/aws?utm_term=bible+concordance+esv PDF link annotation
    • https://cdn.sqhk.co/lamijaluxeso/g0jdhdp/67449536982.pdfIn PDF document text
    • http://kalidejomepajo.scienceontheweb.net/52984949168.pdfIn PDF document text
    • http://rupaduwovuw.getenjoyment.net/30812803270.pdfIn PDF document text
    • http://badoxik.scienceontheweb.net/how_to_lean_body_mass.pdfIn PDF document text
    • https://cdn.sqhk.co/bamebuxi/aigGTig/clock_weather_widget_ios_14.pdfIn PDF document text
    • http://kkkirrreeee.space/punifejiwapaak49b.pdfIn PDF document text
    • https://cdn.sqhk.co/tororukiwuri/sA1F5jf/fill_foreground_color_photoshop_shortcut.pdfIn PDF document text
    • http://wumewil.sportsontheweb.net/espresso_english_grammar_level_2_free_download.pdfIn PDF document text
    • http://kefets.xyz/bexogsp550.pdfIn PDF document text
    • http://pozijuza.scienceontheweb.net/bezojajotanufafafesibu.pdfIn PDF document text
    • https://sekagerufelijet.weebly.com/uploads/1/3/5/9/135965199/5592820.pdfIn PDF document text
    • http://waxedeb.getenjoyment.net/wakarol.pdfIn PDF document text
    • https://fexalikinuzumow.weebly.com/uploads/1/3/5/3/135324316/56106.pdfIn PDF document text
    • https://cdn.sqhk.co/dubikureta/ha6hbhe/instasquare_photo_editor_apk_download_uptodown.pdfIn PDF document text
    • http://wejuveziwep.mypressonline.com/62783344468.pdfIn PDF document text
    • http://lezeninimi.medianewsonline.com/cold_war_vocabulary_worksheet_answers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6d251753-49d0-4f5b-a278-10ed1cacc9d0.filesusr.com/ugd/5c139a_1bfa713be68f448ab2c32863345416ca.pdf?index=trueIn PDF document text
    • https://5ee0d2ad-6486-47ce-ab7d-0e7b2bae4193.filesusr.com/ugd/bc0d1e_0548f856ea3e4d66bcd3144b170ac4a5.pdf?index=trueIn PDF document text
    • https://0a3c8164-ddd9-4522-8472-457ce31ece15.filesusr.com/ugd/d32f78_c4a7aa11f533455a9729ed425fd8ca89.pdf?index=trueIn 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_off0000e848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE848 5184 bytes
SHA-256: 93ad7066ffb58a436b1e5c558f6c1be93984d8f1e2bb1206c099e9d3d5d6cf17
font_01_sfnt_off0000f9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F6 10276 bytes
SHA-256: f030dc379f2da04c95ea4b8756e977841d7aba2a76a7ff57bfcb5f0343f19ab7

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