Malicious PDF — malware analysis report

Static analysis result for SHA-256 a569bdba3e108661…

MALICIOUS

PDF

71.3 KB Created: 2021-03-01 21:56:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: b828bfa2da24d009cdd133cfa98bccbd SHA-1: 63be4bd543e19a1c80e7f4fb0c0ddd3536ebaaaf SHA-256: a569bdba3e1086613fd487ec1d1aaea414eb75de22993d92c08d3f0131a8f8ca
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML and ClamAV, as malicious. It contains numerous embedded URLs, with a primary one pointing to 'soxebez.ru', likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains text related to an audio software manual, suggesting a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://soxebez.ru/strik?utm_term=m+audio+keystudio+49+manual PDF link annotation
    • http://roxelejabojafe.scienceontheweb.net/xifeg.pdfIn PDF document text
    • http://xuxetosufuzo.getenjoyment.net/online_quran_text_with_urdu_translation.pdfIn PDF document text
    • http://vazawujuzu.sportsontheweb.net/12916448890.pdfIn PDF document text
    • http://jalazekesofijot.medianewsonline.com/dabasiwevaxowuvoz.pdfIn PDF document text
    • https://cdn.sqhk.co/dijabidasu/0szogdu/friend_search_tool_for_social_media_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471481/normal_60258da2a8dab.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/jjQfhji/school_management_system_wordpress.pdfIn PDF document text
    • https://cdn.sqhk.co/valujoper/gcPifgf/72401_zip_code_state.pdfIn PDF document text
    • http://derilezin.sportsontheweb.net/netgear_n150_wireless_router_firmware_update.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443595/normal_5ffb147d431a9.pdfIn PDF document text
    • http://kixurox.getenjoyment.net/what_is_the_best_color_of_the_year_2021.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447087/normal_5fd7f9af5536f.pdfIn PDF document text
    • https://cdn.sqhk.co/bebomopakax/dtiiNFY/zedge_app_download_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dezoruxeg.epizy.com/sulija.pdfIn PDF document text
    • http://zimopup.myartsonline.com/zafipuvom.pdfIn PDF document text
    • http://gurabagoderes.atwebpages.com/do_not_drink_wine_bible_verse.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_off0000d888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD888 5288 bytes
SHA-256: f17518e4d06121f06e057564ce4a0a540bedc90b952f6b32704394307a272b91
font_01_sfnt_off0000ea93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA93 10660 bytes
SHA-256: 5c386b1b3f96218f50cdee232bed116fa6d4b51d638b6fe639651cd2e8848a69

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