Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2cacaed9a084ac9…

MALICIOUS

PDF

75.0 KB Created: 2021-04-08 09:50:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0b92de69c22180a1bf543b3bbba686e3 SHA-1: 1888c8afa5a80597c40be79e8c8a40d39da3dc92 SHA-256: e2cacaed9a084ac9c08560205d4caeb3c83f52b53b9a515f538a8f09ad243774
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

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://jacksth.ru/strik?utm_term=tarot+xyz-m+software PDF link annotation
    • http://xelipev.22web.org/notification_center_android_settings.pdfIn PDF document text
    • http://govazibibili.22web.org/add_and_subtract_decimals_worksheets.pdfIn PDF document text
    • http://badge-verification-center.com/us_navy_atlantic_fleet_ships8hinm.pdfIn PDF document text
    • https://cdn.sqhk.co/xegigujatefa/uieOja6/34270502584.pdfIn PDF document text
    • https://cdn.sqhk.co/vetukalujir/hhJfihd/playstation_plus_monthly_games_january_2020.pdfIn PDF document text
    • http://smeshnoykir.space/520253339603imdk.pdfIn PDF document text
    • http://zobotalemogi.sportsontheweb.net/is_an_ear_thermometer_more_accurate_than_a_forehead_one.pdfIn PDF document text
    • http://ziximotizaned.medianewsonline.com/pdf_to_word_converter_google_chrome_extension.pdfIn PDF document text
    • http://gidonuvawugirid.medianewsonline.com/spanish_food_vocabulary_activities.pdfIn PDF document text
    • http://heliusdesign.ru/geronuxumefijeumo3g.pdfIn PDF document text
    • https://cdn.sqhk.co/gosukutusu/5ZibggX/ruwaxewevovinabuda.pdfIn PDF document text
    • https://cdn.sqhk.co/nubavojek/rn1Aqge/dixevobipamutekifatoxula.pdfIn PDF document text
    • http://copyright-infringement.business/niliguz9po69.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wufagezigedo.onlinewebshop.net/13756115965.pdfIn PDF document text
    • https://6cdb29d4-22ce-4aaf-9e51-562b59d50851.filesusr.com/ugd/1b20fb_5af15c60dfb5423ab6b609fa159ba4f1.pdf?index=trueIn PDF document text
    • https://cb71deac-5427-4a11-aec2-6feec017c243.filesusr.com/ugd/4cd983_39cca3ded6df4c108a9cc9382d84856b.pdf?index=trueIn PDF document text
    • http://zaduzos.myartsonline.com/71755450197.pdfIn PDF document text
    • https://c1d61d78-9bae-425c-b347-ee91470fe4f1.filesusr.com/ugd/60933b_f4b77ed1cfd5467db32cdbe863e695ff.pdf?index=trueIn PDF document text
    • https://f904ef53-caa1-4f0f-8a97-c50675c03ece.filesusr.com/ugd/2f8cea_74acc9bba99f4fae901ee751ab24cf72.pdf?index=trueIn PDF document text
    • http://fisowafoz.epizy.com/heap_analyzer_tool.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_off0000e894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE894 5176 bytes
SHA-256: f56746ebaa88fa30d78a9702615622fc06039629a2b40ce1629c0233c5756cf8
font_01_sfnt_off0000fa47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA47 10792 bytes
SHA-256: fb6312db3d363941fcf795238bd185a48e6ad237a41e6b84ebd5ffa9f923a233

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