Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee3788f343294854…

MALICIOUS

PDF

79.0 KB Created: 2021-03-28 16:11:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7188ed00be9514b35c95ff3e398e6302 SHA-1: 15d7192afe7be2feebe60cb0eece3f64bc5b7785 SHA-256: ee3788f34329485441869d02575dc965654f9dcf0821676106e24eb63ac3bd46
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan and an ML classifier indicating maliciousness. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The presence of external URIs and the overall structure strongly indicate an attempt to redirect users to malicious websites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xezojetit.ru/wix?keyword=tm822g+max+speed
    • https://lurevovikofa.weebly.com/uploads/1/3/4/6/134693735/nesaleveje.pdf
    • https://cdn.sqhk.co/soxesemu/fM3BRji/31206666171.pdf
    • http://jobediniberine.scienceontheweb.net/77235578185.pdf
    • http://vimabanu.sportsontheweb.net/what_type_of_oil_to_put_in_a_generator.pdf
    • http://warupipujamoru.sportsontheweb.net/7534337332.pdf
    • http://femuxeririta.mygamesonline.org/54078991571.pdf
    • http://tuzogat.sportsontheweb.net/foxconn_n15235_vga_drivers_windows_xp.pdf
    • http://jevafurevozu.mygamesonline.org/fovaxurebutufukuwora.pdf
    • http://rajeziriga.scienceontheweb.net/bacteriologia_general_evelyn_rodriguez_cavallini.pdf
    • http://xakaderinetatu.mygamesonline.org/fekulokipakamanufinoj.pdf
    • http://dujegud.getenjoyment.net/avon_brochure_august_2020.pdf
    • https://cdn.sqhk.co/juvebuzizej/hahbabD/82144364225.pdf
    • https://josafobuwevaj.weebly.com/uploads/1/3/4/4/134464642/984217.pdf
    • https://cdn.sqhk.co/govupasuti/hiiaMf2/88551585066.pdf
    • http://tulumiv.medianewsonline.com/vodok.pdf
    • http://zovofuti.mygamesonline.org/bayesian_and_frequentist_regression_methods.pdf
    • https://cdn.sqhk.co/gopuxipo/27ifhdY/31781449644.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://muvipej.atwebpages.com/icao_annex_10_vol_4.pdf
    • https://855e1e5b-0daf-4dce-aa73-dfad2bfec5df.filesusr.com/ugd/ced2dc_dfd45295cd954d2ba2f98efc40913c6f.pdf?index=true
    • https://46c19374-600d-43be-a5f2-d8bf07c6fddf.filesusr.com/ugd/cc94a4_a11095dde81c4d83964eab4e36ceac11.pdf?index=true
    • https://696f1bd8-06c3-47a7-a8f7-e83e17ec8d18.filesusr.com/ugd/5ad03d_04acaddca4354f0faf613bf4ef7c3b29.pdf?index=true
    • http://judiserod.onlinewebshop.net/galumimulufasitofu.pdf
    • https://be934b08-0dcc-4e2e-8de1-c3c1c32dbfab.filesusr.com/ugd/d5415a_c389db5e3cf744d39bad1da7899d3376.pdf?index=true
    • https://9f5bcc56-a059-4f00-ae85-604acd6a3d2d.filesusr.com/ugd/ac9354_ea21fc0f37504a21978b05e9082e5480.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f566.bin
4b54771504d94069e9b393afc798a4c4041bb81ccc03c5739e46daaf99d02ed3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF566 5492 bytes
font_01_sfnt_off00010809.bin
87f18496c7e5d8b013fabdfc3f0ba1eaad1deeb3d50accc5b6a2853877ccdcd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10809 12256 bytes

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