Malicious PDF — malware analysis report

Static analysis result for SHA-256 36a3f03cde8d4c6e…

MALICIOUS

PDF

76.0 KB Created: 2021-03-15 23:39:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d75c4983fb02e82ffffe6b57e429a978 SHA-1: bf994374b0e44dac5aa13d82ea835f622b81f363 SHA-256: 36a3f03cde8d4c6e97995e2d3caded0a7529538171a6e918416dc0a304df1eac
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a malicious domain, likely to trick the user into downloading malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains keywords related to game downloads, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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://nipisod.ru/wix?keyword=agario+apk+private+server
    • https://cdn.sqhk.co/zudilubal/ZSoRijY/kubojewaxedegikipeve.pdf
    • https://cdn.sqhk.co/barugogip/hhZEKhc/stick_tennis_mod_apk_revdl.pdf
    • https://cdn.sqhk.co/satofapo/jjghrgh/fusevoroxufelidopodusi.pdf
    • https://cdn.sqhk.co/viwiratoposu/giaoghb/blue_bottle_sting.pdf
    • https://cdn.sqhk.co/xenudipu/uNhhThh/infected_2008_full_movie.pdf
    • http://design-kvartira.info/tujixevitepajwe68a.pdf
    • http://organicnu.info/cnet_iphone_8_plus8oyim.pdf
    • https://cdn.sqhk.co/tavevalurov/BifiaPm/dark_grey_metro_tiles_300_x_100.pdf
    • http://nakrutkavk.site/town_hall_11_baseezvzs.pdf
    • https://cdn.sqhk.co/fomezawelud/gjdihT7/guremuzoj.pdf
    • http://ritual-venki.online/bms_system_in_hvaci0dq4.pdf
    • https://cdn.sqhk.co/vopofuxo/ThiTiiJ/can_you_download_rise_of_kingdoms_on_pc.pdf
    • http://creditreportfast.info/skyworth_55ub5500_review99qzx.pdf
    • https://cdn.sqhk.co/dojidavos/dhbHhdK/amazeballs_downtown_plano.pdf
    • https://cdn.sqhk.co/ketusugedi/LvjhggB/memixagudedosiligok.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c1c2ab80-a4df-49f2-809e-6400e043686b/maxiscan_ms300_manual.pdf
    • https://uploads.strikinglycdn.com/files/a7302723-7092-4585-b6fc-f68d3b239a22/luniz.pdf
    • https://uploads.strikinglycdn.com/files/bc2d772c-cef8-4a9a-8583-5c32f3000b0f/mordheim_core_rulebook.pdf
    • https://uploads.strikinglycdn.com/files/17105deb-5f56-4e83-a819-a8ffdf8ca5bd/spiritual_meaning_of_colours_in_the_bible.pdf
    • https://uploads.strikinglycdn.com/files/c816ba08-42f1-4c6a-8e81-6ee0b0bb76d1/kosaketodiduzu.pdf
    • https://uploads.strikinglycdn.com/files/fde266ab-8fa7-46fe-818c-34a47bd21991/dunir.pdf
    • https://uploads.strikinglycdn.com/files/cce1ffaf-b99c-47d4-b589-71243283bb21/89053367457.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edbc.bin
873f9ba7b1b01cb99d65fa4fc9cf666b0e4309260092427fd661ed2fbcea4f4f
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBC 5068 bytes
font_01_sfnt_off0000ff17.bin
1d56cba8a42a99c963d085255e3da83b0b37c5a7b433f11f488fbc8e59fbcd51
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF17 10576 bytes