Malicious PDF — malware analysis report

Static analysis result for SHA-256 5017fc8b18793f22…

MALICIOUS

PDF

75.2 KB Created: 2021-04-04 09:24:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 3d0f959e160de2a826b159b157fa32cf SHA-1: 5b0af0f58964cb04e33db31436c3a91a5c636492 SHA-256: 5017fc8b18793f22b9f259d13ce5f2b846c1fa6b9f026b348bb1bdc2d3eb5270
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains multiple embedded URLs, with at least one pointing to a domain associated with link farming and disposable hosting. The document body, though heavily obfuscated, appears to be a lure related to 'training plans', suggesting a phishing or social engineering attempt to redirect users to malicious sites.

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://jumiwimov.ru/strik?utm_term=how+to+create+a+training+plan+in+garmin+connect PDF link annotation
    • http://lamaded.mywebcommunity.org/lspdfr_crash_callouts.pdfIn PDF document text
    • https://cdn.sqhk.co/liregevo/CggOqgd/what_chart_categorizes_information.pdfIn PDF document text
    • https://cdn.sqhk.co/furugilenu/jcjhOha/shopping_list_app_that_can_be_shared.pdfIn PDF document text
    • http://wugafis.66ghz.com/24636074723.pdfIn PDF document text
    • http://rijebipimaba.getenjoyment.net/blogs_de_libros_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/mevexobuzur/iejdheA/14455095027.pdfIn PDF document text
    • http://rekijiwowak.scienceontheweb.net/andres_segovia_libro.pdfIn PDF document text
    • https://cdn.sqhk.co/sepunaro/hgjibiJ/ib_chemistry_ia_guide.pdfIn PDF document text
    • http://nazawate.iblogger.org/free_printable_fourth_grade_geometry_worksheets.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d14fea8-6a0a-4932-8494-c939b4208f27/will_there_be_a_5th_eragon_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe225e9f-bd3e-4a30-bddd-4383b46e9098/red_sun_rising_uninvited.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/240a6c51-c988-42f0-89fa-6c761a807940/36028117272.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eafb0c49-7ff7-4636-a28c-63f8693b4ad0/63640130147.pdfIn PDF document text
    • http://jojasodux.epizy.com/tukopisafavat.pdfIn PDF document text
    • http://rulenanevatetid.epizy.com/sitidenagazugixaze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47fac88b-7784-4aed-9b50-fdc35adaf121/80353737937.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f722763f-ea04-427a-a7b8-0cc138d964c6/books_like_power_of_now_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16de9530-5f6a-43d4-a8b2-67afe663580e/wayne_dyer_quotes_on_death.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20481fcf-8dfe-4706-ace1-3a7ef327310f/how_much_does_a_monthly_nj_transit_bus_pass_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0683f620-28ae-4909-9df2-b780bf1e54d9/61746238016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/731ffee3-217d-45b7-b95a-8119d079539f/why_does_my_lorex_dvr_keep_rebooting.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_off0000e882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE882 5128 bytes
SHA-256: 980795292bb6bb84d2117f3b585d316ca6b920d199fcdee957b745e4ea33806e
font_01_sfnt_off0000f9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F6 10896 bytes
SHA-256: f4a0340f6649d3618122da3195141eae68426fd100ef34752959031dfaf06765

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