Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ee319d49ba7483e…

MALICIOUS

PDF

80.8 KB Created: 2021-02-25 05:51:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: e4214c41bc6b5ae18d78d218ab467e77 SHA-1: 576677d89c9d5d03f1cbe9eda6bec161a5f26134 SHA-256: 2ee319d49ba7483ef1fcd8141e91728c42a8ea1d9c2d9ed33b8036d75a498f90
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains numerous embedded URLs, with one prominent URL, 'https://jacksth.ru/strik?utm_term=orbit+57896+user+manual', identified as a potential phishing or malware distribution point. The presence of external URIs and the link farm heuristic suggest an attempt to redirect users to malicious content.

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://jacksth.ru/strik?utm_term=orbit+57896+user+manual PDF link annotation
    • http://lisulav.iblogger.org/papupirudemetufupipudeso.pdfIn PDF document text
    • https://cdn.sqhk.co/suwapipejob/bhh0XcS/the_arcade_rabbit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407331/normal_5ff1bc6a9c704.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371498/normal_5fe349617bfb9.pdfIn PDF document text
    • https://cdn.sqhk.co/xawowatu/GriaXuM/usher_top_songs_youtube.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463809/normal_5fd3ac0fda0b6.pdfIn PDF document text
    • https://cdn.sqhk.co/letaziseb/aiihgii/2185737072.pdfIn PDF document text
    • http://devlp.club/151229634222h8kd.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/lotibabakuj/araro_ariraro_thalattu_video_song.pdfIn PDF document text
    • http://kusofiwu.epizy.com/carousel_templates_bootstrap_4.pdfIn PDF document text
    • http://rutipozi.epizy.com/pokemon_ruby_gba_emulator_for_android.pdfIn PDF document text
    • http://weverikovufom.rf.gd/betowudolaligibikode.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/dofe_assessors_report_card_gold.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/50507701909.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/ylang_ylang_fkj_piano_sheet_music.pdfIn PDF document text
    • http://jusarif.rf.gd/28667457589.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_off0000fe1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE1E 5704 bytes
SHA-256: 77ad201861db1b8e3210d6b99a3f303b831bb9613b65819b880ad1442f5998bf
font_01_sfnt_off0001116d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1116D 10968 bytes
SHA-256: 1c1c8354823d6984aad6d3708b9fa440a80d31e52e3a8128cbceedc46ff80e9d

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