Malicious PDF — malware analysis report

Static analysis result for SHA-256 717a97734f5de6bf…

MALICIOUS

PDF

77.0 KB Created: 2021-04-01 09:26:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 884f0c60eed0dd189b8f70044a05e619 SHA-1: 54a32f1163cb24a4d39085dd215de1524d2b754c SHA-256: 717a97734f5de6bfb03accac9730f911116451a9b32071eaa7b04874e7b1c6b9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9991

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://baarspo.ru/award?keyword=bremsstrahlung+x+rays+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475215/normal_6055cfd8dabc3.pdfIn PDF document text
    • http://agencymedia-ig.com/28822558765aocs1.pdfIn PDF document text
    • http://semengergel.ru/primavera_p6_software_free_download_64_bitx9fww.pdfIn PDF document text
    • http://ruszaimclub.ru/best_i_robot_20205aupe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485578/normal_605cdc862644d.pdfIn PDF document text
    • http://sumapewub.getenjoyment.net/938331479.pdfIn PDF document text
    • http://godotobekof.scienceontheweb.net/rodefizibakaxabumi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367687/normal_5fef14dd0e452.pdfIn PDF document text
    • http://liketsven.xyz/gimumolosup7aod.pdfIn PDF document text
    • http://juwupexutaval.mywebcommunity.org/attachment_styles_adults.pdfIn PDF document text
    • http://strahuemsya.info/2020_toyota_camry_xse_hybrid_for_saledlydg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482230/normal_5fd8dea3c9a1f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/767e02d7-fc1f-48f0-98de-b41006c09d06/sebipofevu.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/2nd_class_maths_textbook_telangana.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/what_will_a_honda_3000_generator_run.pdfIn PDF document text
    • http://laxolagodofomug.onlinewebshop.net/medical_terminology_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e10314fe-9c75-4378-898c-3db6404242e9/cuisinart_coffee_grinder_dbm-8_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8739b96-9259-4b9f-80ac-d6e43857220f/peavey_bandit_112_solo_series_scorpion_equipped.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e628388-6c9e-4598-ab48-be969b47e114/how_to_do_quantitative_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/1861633799.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/53375621332.pdfIn PDF document text
    • http://liraperuwuw.atwebpages.com/39054536523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12aa8e55-e7f6-404b-ad30-dee4e4ab3c9d/jojuliwovetazuri.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/sukoxixiwifex.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_off0000ef93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF93 5676 bytes
SHA-256: 4df33afe314a1abaf4ab5792564dc6a7f50d45887df430d3e7193044ea82c4f4
font_01_sfnt_off000102cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CD 10512 bytes
SHA-256: 39f035ed847aa0e0fc29e2f3ecf47d4aa5f4a81e063418e92d6e21f32a797a3e

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