Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ce6ce85d3e61c72…

MALICIOUS

PDF

104.2 KB Created: 2021-02-28 05:16:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f34085953cecf07b9edae95038ca9f3b SHA-1: 51176b7596aff34decdb983d3cc36781565ee8f7 SHA-256: 4ce6ce85d3e61c7227af36d2c7ba2f41ce5117166cf315711f0ec024e1bbdc31
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 0.9995

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 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://dugedepap.ru/123?utm_term=what+is+the+10th+dimension PDF link annotation
    • https://cdn.sqhk.co/pejinijew/hNgjhhj/30123775289.pdfIn PDF document text
    • http://porizaritofo.mypressonline.com/how_to_start_learning_mobile_app_development.pdfIn PDF document text
    • http://nemosixumeki.mypressonline.com/parabody_350_workout_chart.pdfIn PDF document text
    • https://lefiluke.weebly.com/uploads/1/3/4/8/134887161/d4008401f1bfdc.pdfIn PDF document text
    • https://cdn.sqhk.co/togodawexu/ghiejal/26442843024.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447467/normal_5fd265d7549fd.pdfIn PDF document text
    • http://jaxagogilexet.sportsontheweb.net/does_vroom_negotiate.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471275/normal_60142f8a630fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373297/normal_5ffa8a899183a.pdfIn PDF document text
    • http://wifunagidoli.mypressonline.com/wobipiwim.pdfIn PDF document text
    • https://cdn.sqhk.co/rasepotobami/ejbgjhf/pokemon_the_movie_detective_pikachu_download.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
    • http://lojabupabavize.onlinewebshop.net/element_4k_tv_remote_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/gulupunenedewir.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/wagekewugokupub.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/contemplated_black_s_law_dictionary.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/motokozukipuri.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/missguided_lace_up_flared_jeans.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/jonudetusaxar.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000134a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134A4 4932 bytes
SHA-256: b3340eb4e08329e618128e9592463aa944528c75537a599af1c112ad869d30dc
font_01_sfnt_off0001454d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1454D 13156 bytes
SHA-256: e6cb3e69bd4904ee71a227920e8923c54d143ce10dd8573002b40bf071e785c9
font_02_sfnt_off00016f77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F77 16200 bytes
SHA-256: 09af706f735e7630b57d5fb4c4388afdd2afd860837c2f627842bb33ddf8652a
font_03_sfnt_off000184bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x184BD 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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