Malicious PDF — malware analysis report

Static analysis result for SHA-256 4786bf547b5d294a…

MALICIOUS

PDF

76.3 KB Created: 2021-04-08 06:56:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cca16ba16211869202c50c1c40a44686 SHA-1: b1d0a7ec3d8f1ab9748b514ed7f9996227b6bc3c SHA-256: 4786bf547b5d294a44dca2e1bd49d201695f9cbe98477acbd94cf7c0615e562d
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, suggesting it is part of a link farm or designed to redirect users to malicious sites. One of the primary external URIs points to zajinet.ru, which is likely part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/wix?keyword=springfield+xdm+manual+safety
    • https://cdn.sqhk.co/gijosevozu/jUjfie5/make_ice_cream_in_a_mason_jar.pdf
    • https://zivexipoter.weebly.com/uploads/1/3/1/4/131483036/zegirapuwavaw.pdf
    • https://cdn.sqhk.co/liminekaj/IF09ghY/93994167572.pdf
    • https://cdn.sqhk.co/moviferu/djifNBc/retro_space_phoenix.pdf
    • https://cdn.sqhk.co/rarukaboz/hjlrA2x/reebok_zigtech_football_referee_shoes.pdf
    • https://vusowosunuk.weebly.com/uploads/1/3/5/9/135975823/rifazid_xujavexed_zodipepedifi_fovepisot.pdf
    • https://cdn.sqhk.co/dodirorip/hfjhpSM/george_adamski_livros.pdf
    • https://cdn.sqhk.co/vekudaselux/ygjthgi/aliens_drive_me_crazy_apk_mod_download.pdf
    • https://gatepeduvemixif.weebly.com/uploads/1/3/4/6/134669895/zuvir.pdf
    • https://nolobatunu.weebly.com/uploads/1/3/0/7/130740420/xozixoxav_dokof.pdf
    • https://cdn.sqhk.co/jotepomi/jiijeLx/10099736720.pdf
    • https://xopuwofotore.weebly.com/uploads/1/3/1/8/131871456/jomixewiw_tujepujusul_tojowumuti.pdf
    • https://cdn.sqhk.co/duporetixi/Vm0VggG/aashiqui_2_movie_pagalworld.pdf
    • https://bozuwosumexoxal.weebly.com/uploads/1/3/2/6/132682772/zusalok-zazunatitiba-tafud.pdf
    • https://cdn.sqhk.co/jupujezaxa/bjg2CBB/tornadoes_pizza_in_belleville.pdf
    • https://gawosiluzetur.weebly.com/uploads/1/3/4/6/134631715/zagevesezasolewexor.pdf
    • https://cdn.sqhk.co/tedogegez/VieDNhi/neogeo_battle_coliseum_xbox_360.pdf
    • https://kefagifugujog.weebly.com/uploads/1/3/0/8/130813645/46417a468.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://61069a5e-3c5f-4884-a3c7-8c7552058b74.filesusr.com/ugd/0789d5_0481e94ea1b348f6972f320730cfe3ef.pdf?index=true
    • https://45180a89-8b92-4d54-a4c6-cdf0ad6af3c7.filesusr.com/ugd/2b98a3_756e98f7651941179e43824af0a72be0.pdf?index=true
    • https://fa3f2985-242d-4a4c-93c0-6adbfb259eaf.filesusr.com/ugd/8dbe7a_f5b5c49e145f47629609c6717d72d37e.pdf?index=true
    • https://6c49ff76-e13b-46da-8354-2e633d56f736.filesusr.com/ugd/211c2d_36abb95489c848a1b168a868b97ca6ed.pdf?index=true
    • https://6cf80756-66c2-4d2e-b15d-ff1677cb7115.filesusr.com/ugd/2257e8_dff1d042058b4378b118338f5ea82571.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_off0000ea45.bin
7e6d85dcfd55db3cdd1ba195be225dc07c2bcd49074c1d40a4147cc47a374db5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA45 5632 bytes
font_01_sfnt_off0000fd6e.bin
cb33eaf7f27c073260254915052de34c82c534cf190ea1a68b75321a91acc9a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6E 11120 bytes

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