Malicious PDF — malware analysis report

Static analysis result for SHA-256 e788ce9995789234…

MALICIOUS

PDF

84.6 KB Created: 2021-04-03 12:25:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0f4317938cffdb26ab4e1ceadb159eeb SHA-1: 15718cc8aa3087a89be26f982811a7f1d70bdc13 SHA-256: e788ce999578923442e53f634fcfda7c0eb200d71c6072a92158599a97f9ed2b
134 Risk Score

Malware Insights

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

The file is a PDF that contains numerous links, many pointing to disposable hosting, suggesting a link farm designed to obscure malicious activity. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' point towards an attempt to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/award?keyword=pdf+bhagavad+gita+in+telugu+free+download PDF link annotation
    • http://gifazat.iblogger.org/bahubali_movie_2_telugu_free.pdfIn PDF document text
    • http://neyroskakalka.site/zilisojexiwumonikufizozyhl8r.pdfIn PDF document text
    • http://lidlid.xyz/lego_batman_2_movie_dc_superheroes_unitea6rla.pdfIn PDF document text
    • http://bcpzonasegur4viabcp.com/tattooist_of_auschwitz9sy8z.pdfIn PDF document text
    • http://leoidet.xyz/golenji90v.pdfIn PDF document text
    • http://amsidgi.xyz/athiran_movie_songs_starmusiqnbrtx.pdfIn PDF document text
    • http://nazhivy.net/38992058484voshv.pdfIn PDF document text
    • http://luwazesoj.22web.org/fokugepalin.pdfIn PDF document text
    • http://tumerasiwabuzip.22web.org/epson_l805_id_card_tray_template.pdfIn PDF document text
    • http://fovagenifozemub.iblogger.org/foodservice_organizations_a_managerial_and_systems_approach.pdfIn PDF document text
    • http://theraisins.pro/excel_get_data_from_another_sheetzhe0b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://fewetero.epizy.com/wotadawilojosiluxe.pdfIn PDF document text
    • https://6d5fec37-5936-4ae8-8938-03a86e982f09.filesusr.com/ugd/d4da64_3637885fe0824e60a38b4e69e4b3946c.pdf?index=trueIn PDF document text
    • http://sufazomewugexu.epizy.com/79330494454.pdfIn PDF document text
    • http://vitupofelomar.epizy.com/88365512377.pdfIn PDF document text
    • http://sesunofopum.epizy.com/rachmaninoff_vespers.pdfIn PDF document text
    • http://najevepa.epizy.com/4814599521.pdfIn PDF document text
    • http://kejarajavamoge.epizy.com/is_nordictrack_s22i_worth_it.pdfIn PDF document text
    • http://doroxepazu.epizy.com/how_much_to_start_a_pawn_shop.pdfIn PDF document text
    • http://doruxexim.epizy.com/how_to_spell_be.pdfIn PDF document text
    • http://wunorewotiv.epizy.com/tufigome.pdfIn PDF document text
    • http://gixisenusadat.rf.gd/forawave.pdfIn PDF document text
    • https://b01ec662-dec5-4f54-b977-8708717d6054.filesusr.com/ugd/07e02c_d4a252c03186435c8ee95d7e011b2bb1.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D7 5284 bytes
SHA-256: 6c201a8a4d2634ded1f01092e658b59b0169157cb507a85f3f91f6eee1594780
font_01_sfnt_off0000e6e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E1 25368 bytes
SHA-256: 52027d4c4354fa66ebb64a9ebb36625f863974b8180edf17a92288a9d5270e9b
font_02_sfnt_off00011f77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F77 10352 bytes
SHA-256: 1657dfced6bfdf8ec77b0d06e7fc5f31d674d64ce2c0387eb070049038498b17