Malicious PDF — malware analysis report

Static analysis result for SHA-256 68154e3097226eef…

MALICIOUS

PDF

111.6 KB Created: 2021-05-04 03:53:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c5de2ad85e42abd9ab54a6ef8d74fc75 SHA-1: d71c0c3040ab6b8789543e6edfd7f88fc184a53c SHA-256: 68154e3097226eeff80d6185c0616f17fb266b2cfab993741a6cda209e256348
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. 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 0.9997

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/strik?utm_term=player%2527s+handbook+1+4e+pdf PDF link annotation
    • https://cdn.sqhk.co/jawutuwek/9Cjh0QS/lisovobivuximaka.pdfIn PDF document text
    • https://nolipugi.weebly.com/uploads/1/3/4/6/134652161/82cf72b3435.pdfIn PDF document text
    • https://dowisapi.weebly.com/uploads/1/3/4/2/134266119/ruvivozelunaz.pdfIn PDF document text
    • https://cdn.sqhk.co/suwezuzifu/zYhciie/jomenus.pdfIn PDF document text
    • https://dadekubezaxinis.weebly.com/uploads/1/3/2/7/132740399/femomobekivad.pdfIn PDF document text
    • https://cdn.sqhk.co/pulununese/ib3PiTX/xamin.pdfIn PDF document text
    • https://cdn.sqhk.co/nebuwaxisiw/ijjdhj2/sakisutejelopije.pdfIn PDF document text
    • https://cdn.sqhk.co/dilujuzaga/Fnvjcha/packer_game_today_score.pdfIn PDF document text
    • http://hdvideo.design/6207009455lw692.pdfIn PDF document text
    • http://goldstein.capital/hp_10bii_financial_calculator_clear_memorya6zi0.pdfIn PDF document text
    • https://cdn.sqhk.co/rarukaboz/jewjajb/80054854093.pdfIn PDF document text
    • https://cdn.sqhk.co/pafatewodoju/fgchc8o/pagige.pdfIn PDF document text
    • http://alsamcctv.com/mixixeminunaxidaf0cjof.pdfIn PDF document text
    • https://nigusejokolutat.weebly.com/uploads/1/3/4/6/134688827/rekawiwijom_mafos_puvil.pdfIn PDF document text
    • http://poopo.ru/jaxabogokebisamogonn0qnj.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/xisakazelelinim/harmonize_kainama_video.pdfIn PDF document text
    • https://67dbe094-6b68-4a2c-870f-9bd980043d88.filesusr.com/ugd/cff74a_356874f3cd894e6b8a1213a1c47ee4e1.pdf?index=trueIn PDF document text
    • https://18e99e0c-7034-4a8c-9069-267580a295b8.filesusr.com/ugd/b337f5_a5e1b955237940c5860f1a1e0af4551e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/jadubabo.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/67883009040.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/mares_puck_pro_wrist_dive_computer.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_off00017892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17892 5612 bytes
SHA-256: eca3e4361040d7c669457e365ebb3544fa4c463bafc36c21d7550df71cb4872c
font_01_sfnt_off00018bb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18BB6 11032 bytes
SHA-256: 48972b24cbe1b2dbdeea9faba52ced8652181327b770552904d91a6fc0e02822

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