Malicious PDF — malware analysis report

Static analysis result for SHA-256 8861d36b5dbd5998…

MALICIOUS

PDF

116.9 KB Created: 2021-03-12 21:12:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e5927631c004ada8bd73b6550741b7b0 SHA-1: 58fda55ac011a85bab466ff4ca69fdd0a49e5f88 SHA-256: 8861d36b5dbd599845181c7264eb4e0e265beb21297f446b164ebcadae1c92f6
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9994

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 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.
  • 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://mezovuduw.ru/wix?keyword=majora%2527s+mask+randomizer+rom PDF link annotation
    • http://wwnews.site/lyskamm_4000_guide_alpineg9u5c.pdfIn PDF document text
    • http://a1metromovers.com/toduwenugibakegedpiup.pdfIn PDF document text
    • http://libralab.digital/897086615235749n.pdfIn PDF document text
    • http://kismyketio.com/bitaxexebopepbh9.pdfIn PDF document text
    • http://igcopyrightforhelps.com/164524084262gf3c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://42f4b946-f871-4f2a-a73e-6571c6569919.filesusr.com/ugd/e20521_f07cf508d89942c384c79851bc73e28a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f07e9dd4-8781-42d9-9875-58b239f5308c/how_to_find_acceleration_due_to_gravity_at_different_altitudes.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/guided_reading_level_app.pdfIn PDF document text
    • https://cf21b241-1edd-4e7a-8b85-4b7fa12bec5a.filesusr.com/ugd/835652_2a544d65fe114c7582e48286e26e43f3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/24bf08f8-954f-44ef-ab68-0e38a7e22f77/nc_paralegal_certification_study_guide.pdfIn PDF document text
    • http://xadatadute.epizy.com/latest_android_for_tablets.pdfIn PDF document text
    • https://a161ff94-1a6f-4367-b6f8-8e513a5e676d.filesusr.com/ugd/4c7633_b694d57964ee451186a2501b3da66794.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/12f18d33-80ba-4a19-9fdd-1d117ac76ca7/25914962.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/leapfrog_my_own_leaptop.pdfIn PDF document text
    • http://bopufadepop.epizy.com/fotevaseguxile.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/consumer_reports_best_suv_tires.pdfIn PDF document text
    • https://0c7ecde5-8d52-4b6d-bf00-bcb9beb5fd3c.filesusr.com/ugd/b6f5a5_df0fdee879bb4bd79f603a025ed733fc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/vegetarian_diet_chart_for_weight_loss.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/67404643302.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/26915658463.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/nudonuzadugo.pdfIn PDF document text
    • http://mafefelanepule.epizy.com/muslim_baby_girl_names_2020_with_meaning.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001827d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1827D 4876 bytes
SHA-256: 68dfc71c5d22a63657ddd3fe72eaaadf0f44e75b2ea9c076f3d2ddf22c8ef4f6
font_01_sfnt_off00019304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19304 10760 bytes
SHA-256: 8a167eddec8afbc221551acbf12078fe874d964669e1bc7ea5e5cdb27bbee064
font_02_sfnt_off0001b78c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B78C 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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