Malicious PDF — malware analysis report

Static analysis result for SHA-256 7de24350cf072947…

MALICIOUS

PDF

76.5 KB Created: 2021-03-10 05:13:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c3ee45d60f27aa2990107417576088fe SHA-1: cd87a731dcf59735476b11cc2b8ad27bd7dda95f SHA-256: 7de24350cf07294721fb6b7773fdec5fff77c297546288f7f7d2359685cdc000
126 Risk Score

Malware Insights

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

The file is a PDF identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs pointing to potentially malicious domains, suggesting a phishing or malware distribution attempt. The PDF structure and embedded links are indicative of a link farm used to obscure the final malicious destination, a common tactic for initial access via spearphishing.

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://zajinet.ru/wix?keyword=mpsa+2020+coronavirus PDF link annotation
    • https://zipixaxunisegon.weebly.com/uploads/1/3/4/6/134625234/9950d59.pdfIn PDF document text
    • http://fomamiforepu.22web.org/7649472456.pdfIn PDF document text
    • http://gidpopiteru.com/murebizebolupemeropo4imwy.pdfIn PDF document text
    • https://fipogelijemebu.weebly.com/uploads/1/3/1/3/131398193/954896.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407084/normal_5fee83b403d14.pdfIn PDF document text
    • https://gonagulinifuf.weebly.com/uploads/1/3/1/8/131856247/wuwokibu.pdfIn PDF document text
    • http://bobr.space/download_chilton_manual_freefxnh8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474457/normal_600fbffd1014b.pdfIn PDF document text
    • https://cdn.sqhk.co/kepilujofeje/jgtgdic/tamil_love_whatsapp_status_video_download_mp4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393515/normal_5fd2abb969cd7.pdfIn PDF document text
    • https://cdn.sqhk.co/xeviremal/XGhjyk3/43655165140.pdfIn PDF document text
    • http://fojozefamofu.22web.org/94498103420.pdfIn PDF document text
    • http://pihodze.com/agfa-_gevaert_annual_reportnsfi9.pdfIn PDF document text
    • https://cdn.sqhk.co/vemetafije/hitgg4J/flow_chart_vector_free_download.pdfIn PDF document text
    • http://atomyimperial.ru/33465265272epi1y.pdfIn PDF document text
    • https://cdn.sqhk.co/wodelaganav/ch3c08T/love_quotes_for_wife_in_spanish.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://relimimukavewuj.rf.gd/game_bleach_brave_soul_terbaru.pdfIn PDF document text
    • http://pazizota.rf.gd/cuales_son_los_tres_tipos_de_ecuaciones_cuadraticas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc5d1733-fa25-4738-bfdc-45743284fb0b/present_simple_and_continuous_exercises_upper_intermediate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ff8b30c-8126-4dd5-bee6-7a004088a558/windows_10_free_upgrade_2020_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DB 4916 bytes
SHA-256: 9c192c8ddbaaaf4f5a99828df1bccb9c36512f4105173d53bc1ac7e984e48569
font_01_sfnt_off0000f495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF495 10028 bytes
SHA-256: fd0ccb6c8f5fc4ddfb6b8ef8e2092ee6641381c966e0cc3a76ac4908112c317a
font_02_sfnt_off000116da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116DA 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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