Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8c767a50eaa2f25…

MALICIOUS

PDF

87.5 KB Created: 2021-03-22 23:22:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1ae1d02f193a021482109234bec5a4d9 SHA-1: 8759b8b4b5d2afcb77a22c2adadc1db8fcac255e SHA-256: c8c767a50eaa2f25e37ef53dfbf4cfd8585b53f3b267dcd42fe8d1d3ecb531d3
186 Risk Score

Malware Insights

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

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 0.9998

Heuristics 6

  • 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 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.
  • 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://mezovuduw.ru/wix?keyword=botanist+leveling+guide+shadowbringers PDF link annotation
    • https://cdn.sqhk.co/dubeminap/g89leNA/61184586797.pdfIn PDF document text
    • https://cdn.sqhk.co/jopubelo/Bjdiaol/rapul.pdfIn PDF document text
    • https://cdn.sqhk.co/nebemina/4iaOhdm/796334986.pdfIn PDF document text
    • https://bojufare.weebly.com/uploads/1/3/1/0/131070992/6a1370c92a14eba.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwoxebu/Cii2oij/playstation_store_ps5_console.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/MQSieqf/pong_king_party_3d_debug_code.pdfIn PDF document text
    • https://molavose.weebly.com/uploads/1/3/5/3/135350427/vunimamimixetutesab.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/Rv4WjaA/tefimelomepuwu.pdfIn PDF document text
    • https://befugusugub.weebly.com/uploads/1/3/2/6/132683140/c579d267d5fe8ff.pdfIn PDF document text
    • https://cdn.sqhk.co/vujaderaz/jheDTcX/zuzirorimuxaxamupot.pdfIn PDF document text
    • https://gilijopagexoda.weebly.com/uploads/1/3/4/7/134713479/cf70b9a7d.pdfIn PDF document text
    • https://fatitabo.weebly.com/uploads/1/3/4/7/134757356/futedozidenavuvab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tulifal.onlinewebshop.net/waniwojokikod.pdfIn PDF document text
    • https://s3.amazonaws.com/jigezilor/18753747078.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/najuf.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/cinema_4d_r20_anleitung_deutsch.pdfIn PDF document text
    • http://gumomexad.onlinewebshop.net/total_azolla_zs_32.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/moputikemasidirobogapid.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/11945826106.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_off000115a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A7 5428 bytes
SHA-256: 66cc65f3e0b373a498b8a9cf21e53feac2b8975d06b3a6793b8b6ed6fda8f824
font_01_sfnt_off00012825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12825 11736 bytes
SHA-256: d087de33adcc659e7b8c6bc0bad8dfa3aedf68333406c60ae6f6c674614eb864

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