Malicious PDF — malware analysis report

Static analysis result for SHA-256 913654d5be8245e4…

MALICIOUS

PDF

74.0 KB Created: 2021-02-20 17:57:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 589c511fbaaab931cbf3436a82572331 SHA-1: e3598c196cf4e5a05bbfa7ae3f70c8154f4a48a8 SHA-256: 913654d5be8245e41d9dd38d184d4b993205b4bf404f28d4d6409d239b34b95d
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with a prominent one leading to 'jottigo.ru', suggesting a phishing or redirection attempt. The PDF structure and embedded links point towards a tactic of using deceptive content to drive users to external, potentially harmful, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://jottigo.ru/strik?utm_term=dyson+dc25+animal+filter+pops+out PDF link annotation
    • https://cdn.sqhk.co/nifodotiriru/ricjcWC/texas_holdem_poker_house_of_pokerist_ps4.pdfIn PDF document text
    • https://cdn.sqhk.co/savageven/agihehc/kadilezutudozagezobovul.pdfIn PDF document text
    • http://copyrightmediahelp.com/45443258865qdi5v.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/hbXGjet/smart_care_hand_sanitizer_recall_usa.pdfIn PDF document text
    • http://hookup154.online/xolafuxatunibasuvaginob63kdp.pdfIn PDF document text
    • https://cdn.sqhk.co/nivurerazusa/Shcmfhc/lighthouse_point_yacht_club_jobs.pdfIn PDF document text
    • https://cdn.sqhk.co/pojukitogex/fjaajdB/vaxufepuvaji.pdfIn PDF document text
    • http://vajununer.iblogger.org/pujifij.pdfIn PDF document text
    • https://cdn.sqhk.co/xiroxozalal/h5DLcja/forozoni.pdfIn PDF document text
    • http://50offstore.info/85277966059wsyyt.pdfIn PDF document text
    • https://cdn.sqhk.co/suxavawudomo/5hdxgxr/republique_android_game_review.pdfIn PDF document text
    • http://karnaval.host/vokezifotilewilie9qqu.pdfIn PDF document text
    • http://raxijinerig.iblogger.org/graph_paper_printable_template.pdfIn PDF document text
    • http://fredo.run/packers_news_bleacher_reportpf5cc.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/safago/nageboko.pdfIn PDF document text
    • http://kudogal.rf.gd/integrated_math_1_final_review_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/blank_sheet_of_paper_images.pdfIn PDF document text
    • http://xojapenekoxij.rf.gd/4411984204.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_off0000df5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5D 5660 bytes
SHA-256: d3c6e3d9c4b10349139963be2aeb52aac722ecf80eaee7664368d254c78529b8
font_01_sfnt_off0000f298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF298 12604 bytes
SHA-256: 4462a78f4c91f318d96b31e8261fbb3b537de1527310ad24715f14fb3004fcd3

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