Malicious PDF — malware analysis report

Static analysis result for SHA-256 47f75fd84443d83e…

MALICIOUS

PDF

79.6 KB Created: 2021-03-29 11:53:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8f22ea448fc9ecc12745ae35a5f7b13b SHA-1: 36330e4be51bb6468ef627546458dfce17761690 SHA-256: 47f75fd84443d83e219063f9686daf34b28cb5518889bec83762fa9936b3848b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/strik?utm_term=cub+scouts+cyber+chip PDF link annotation
    • https://cdn.sqhk.co/foropogajag/jNrijhf/44666794942.pdfIn PDF document text
    • http://lnstagramverifiedsbadgesforms.com/36439908181n6s6n.pdfIn PDF document text
    • https://cdn.sqhk.co/xurakipigub/f6EmjjN/vegoxilenugobuwomerexazis.pdfIn PDF document text
    • http://ig-about.net/star_wars_ahsoka_book_barnes_and_noblee8j7w.pdfIn PDF document text
    • https://cdn.sqhk.co/vobevufubito/N26HhgX/84006659043.pdfIn PDF document text
    • https://cdn.sqhk.co/tamenotu/djcijif/batua_sa_muh_song_pagalworld._com.pdfIn PDF document text
    • http://moymagazin.xyz/can_i_have_this_dance_piano_sheet1vt8r.pdfIn PDF document text
    • http://jukavoluv.iblogger.org/22914388493.pdfIn PDF document text
    • http://tcerkovniekupola.space/causal_factor_tree_analysis_examplenmv6r.pdfIn PDF document text
    • http://liketime.online/pugoxetuzobunivor7vzx0.pdfIn PDF document text
    • https://cdn.sqhk.co/pananumujo/HhigiCe/botoburesima.pdfIn PDF document text
    • http://buylettersonline.com/flir_one_pro_lt_thermal_imaging_camera_attachment_micro_usb_w_usb-c_adapterie908.pdfIn PDF document text
    • http://italysummer.space/73750178435lo5kc.pdfIn PDF document text
    • http://ionatr.fun/40601765487a7z9v.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/28731989983.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/cuisinart_dcc_1200_vs_3200.pdfIn PDF document text
    • http://xafejebefejo.epizy.com/bolotemusupuw.pdfIn PDF document text
    • http://xejotapawadi.epizy.com/como_hacer_archivo_comprimido_en_zip.pdfIn PDF document text
    • https://s3.amazonaws.com/zowibatev/siladakarunakojubilol.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/conjugaison_avoir_a_tous_les_temps.pdfIn PDF document text
    • http://rajokawaxes.rf.gd/94363879442.pdfIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F3 4928 bytes
SHA-256: fb52c1a8434e2adcc427bb1dac1747942d62c1963a44bf1d11fa7671cd6b4b66
font_01_sfnt_off000107b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B1 11824 bytes
SHA-256: e91a3b608d4f5f44d267a13fa05a56ae58591d9867f28b23a1f28a2fbdb099b0