Malicious PDF — malware analysis report

Static analysis result for SHA-256 3be178560acc572b…

MALICIOUS

PDF

87.2 KB Created: 2021-04-19 08:33:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e56dadf8ea27c83e7ff8094fa7242e30 SHA-1: 56a34e8e020a7c21707eb29952fe378fdea30c1f SHA-256: 3be178560acc572b353f933a33e5cf2378d6f2abc2a8c5b8b54080e2aa5c33c9
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to domains commonly used for phishing and malware distribution. The heuristic PDF_SEO_LINK_FARM indicates a deliberate attempt to create a link farm, likely to improve search engine ranking for malicious content. The embedded URL and the ML classifier strongly suggest malicious intent, likely to redirect users to phishing or malware sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/strik?utm_term=is+tokyo+ghoul+on+netflix+australia
    • https://cdn.sqhk.co/wofunukasu/MJ2igSq/11747886998.pdf
    • https://cdn.sqhk.co/wezikinupig/heghiiH/ragujotapanefokosired.pdf
    • https://cdn.sqhk.co/tefulobesa/4jzmSib/limbo_walkthrough_ch_26.pdf
    • http://rivafigikiwax.medianewsonline.com/57521585865.pdf
    • https://cdn.sqhk.co/razulati/V1bhghh/electric_bass_guitar_for_sale_near_me.pdf
    • https://cdn.sqhk.co/pixorikibam/jRqFfig/lasipun.pdf
    • http://suporefebakibur.mygamesonline.org/vomusijaniviwusigod.pdf
    • http://vumonivaxozutod.mypressonline.com/ruvusu.pdf
    • https://cdn.sqhk.co/vorowobenune/ijmTYRU/zegaxe.pdf
    • https://cdn.sqhk.co/vojofarakiva/ieAGzij/97446438854.pdf
    • https://cdn.sqhk.co/towafeniruje/icpHp8Q/hexagon_board_game_cafe_kensington.pdf
    • https://cdn.sqhk.co/femelofep/ibhc8Vz/lexinezateluragikikiwiwu.pdf
    • https://cdn.sqhk.co/jemajujo/ZOJKMjc/rayman_jungle_run_mod_apk_data.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://8ed6bd9f-de2b-4923-b7df-82f95eb18a03.filesusr.com/ugd/7fa32f_59d565900c7b4604acdecc25ddd0684f.pdf?index=true
    • https://s3.amazonaws.com/pomaxa/worship_house_7_songs.pdf
    • https://a7da3e60-63c8-46c1-a846-eab7df628ed2.filesusr.com/ugd/bba345_51a183c98f9e4ce0b5309ae7b9b57094.pdf?index=true
    • http://gutekuretejapoj.onlinewebshop.net/20369952937.pdf
    • https://f200304d-316b-45a9-b05c-680123ec6d1a.filesusr.com/ugd/aad1a2_3679c64f0fce4d088695ab34c69cd55d.pdf?index=true
    • https://s3.amazonaws.com/veledabejufi/63587427463.pdf
    • http://bipegokatif.onlinewebshop.net/xizewusevogazupubaxutif.pdf
    • https://s3.amazonaws.com/xijalovelokolep/best_cracked_android_games.pdf
    • https://8546b567-499d-44cb-812b-f4cb210fa0cc.filesusr.com/ugd/1f0b74_5b39bd2d327e431dba28a37b2b6d5a75.pdf?index=true
    • https://s3.amazonaws.com/xebuvuwov/worksheet_in_periodic_table_of_elements.pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104e7.bin
694fcfc5bc2205e22c4b278547de1feddb4f0a3a851324ba4b112490014dcc5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104E7 5020 bytes
font_01_sfnt_off00011643.bin
91d511ad25fdc1b84fb5a1a4da2a4ef50e78223c24c1b857f65262f5e52fcd46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11643 5200 bytes
font_02_sfnt_off00012803.bin
bf6360eeafe3b79ada0abac527093a9088377cbf803faedff4ec3210032fff95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12803 11412 bytes

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