Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e67c682ab153273…

MALICIOUS

PDF

87.9 KB Created: 2021-02-20 12:46:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5c86060a8cecc09a414457f47cebf6da SHA-1: 7ad4c3d2014eb6fbf4ba44cdb665046c25fc1b02 SHA-256: 5e67c682ab1532731ed03f49c82127848b920a48c9afab4c6b67d73b22989ad6
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains or link farms, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the ClamAV detection 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0' strongly suggest malicious intent. The primary URL, 'https://jottigo.ru/strik?utm_term=que+significa+super+way+en+espa%25C3%25B1a', is likely the landing page for the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/strik?utm_term=que+significa+super+way+en+espa%25C3%25B1a PDF link annotation
    • http://ecoservice-vlad.ru/myers_briggs_personality_meaningfo0op.pdfIn PDF document text
    • https://cdn.sqhk.co/puburikob/Jjbib4J/29893349330.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/verhcye/dead_trigger_2_pc_game_download.pdfIn PDF document text
    • http://bhd-management.space/bmw_r1250gs_owners_manuallfmxs.pdfIn PDF document text
    • http://jasavutarapif.22web.org/90458499921.pdfIn PDF document text
    • https://cdn.sqhk.co/rogekanus/YQhiig9/nvidia_shield_gamestream_review.pdfIn PDF document text
    • http://bemixenorekuji.22web.org/xesupedegamuwepadojaseli.pdfIn PDF document text
    • https://cdn.sqhk.co/sigidezok/hfOOqii/28814541368.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kunivoji.epizy.com/practical_research_planning_and_design_7th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/aws_cloudformation_s3_bucket_yaml.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/88561283286.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/70410640345.pdfIn PDF document text
    • http://josisuvo.epizy.com/xeruzulevaxulupuv.pdfIn PDF document text
    • http://jezawirigi.epizy.com/fanabuxoluzaribaralixe.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/fibivanamewepos.pdfIn PDF document text
    • http://vuxikujare.epizy.com/40903870746.pdfIn PDF document text
    • http://pokizepifowuw.epizy.com/playstation_2_emulator_android_tablet.pdfIn PDF document text
    • http://patemud.epizy.com/jusevuretutitivolizok.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A8 5620 bytes
SHA-256: eaf5571dce05cf5971fe9e48dcd9fdc80400aa64c7e14dc792e016e5b825b7c3
font_01_sfnt_off00010aba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABA 12900 bytes
SHA-256: 68c5b31aab288699eb443ff41a0c24ef73b7091627119ce6a37e158284a38c03
font_02_sfnt_off00013487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13487 17812 bytes
SHA-256: 0ad35c37963116a57df71eddb60bbb75537b59044f9d77a8f051476b5f1b6638