Malicious PDF — malware analysis report

Static analysis result for SHA-256 14df5eca42826d97…

MALICIOUS

PDF

83.1 KB Created: 2021-03-05 12:52:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6194c9c55723f539ffaeab179336b1eb SHA-1: 5fe14ce9e1a99dfd1fab6f8fed7ba2a590d065d7 SHA-256: 14df5eca42826d9737adb378ec999e98984cecc2edfd2f44c5c09fd7ef173b31
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 0.9997

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://mezovuduw.ru/123?utm_term=what+is+seeding+process+in+bod+measurement PDF link annotation
    • http://fakaripeti.xyz/96908403133gevw1.pdfIn PDF document text
    • https://cdn.sqhk.co/pigajifaw/ggfJgit/tebomupakuxakefobori.pdfIn PDF document text
    • https://cdn.sqhk.co/lojumisebu/iigjcFE/fozakemaduj.pdfIn PDF document text
    • http://nikomodemudajo.iblogger.org/google_sheets_api_append.pdfIn PDF document text
    • https://cdn.sqhk.co/dodipenameki/hjjcigZ/penalty_kicks_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kupejabel/jg69giB/business_management_definition.pdfIn PDF document text
    • http://goldotzyv.ru/honeywell_hcm_350_humidifiern0rtd.pdfIn PDF document text
    • http://help-feedback-amzn6.xyz/setewakevobevowihqxd.pdfIn PDF document text
    • https://cdn.sqhk.co/lusesito/rhbggVi/84940173919.pdfIn PDF document text
    • http://profaudit32.ru/89686801582z53ib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://baduwujik.rf.gd/22014648994.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/novomeruvevoxesozisiw.pdfIn PDF document text
    • http://sadabodavezuzi.epizy.com/writing_matters_2nd_edition_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/puwafisifuvejelopunefawaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd2eb185-09f0-479f-b111-5c2ed1010e60/19635461279.pdfIn PDF document text
    • http://sajumapudetuji.rf.gd/edexcel_a_level_economics_textbook_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b4720c7-75f7-4a37-8935-866f1dd0f3a7/bluebook_citation_format.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/how_to_reset_daikin_error_codes.pdfIn PDF document text
    • http://wiwedekepumepup.epizy.com/how_to_draw_a_turkey_with_your_handprint.pdfIn PDF document text
    • http://xuwugufufokiti.epizy.com/vpn_android_gratis_china.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_off00010782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10782 5608 bytes
SHA-256: 2b1784e58bb5fdb5cf3f114d67eb5cb4b4fef4f08d279c316088d30109c28422
font_01_sfnt_off00011a78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A78 10680 bytes
SHA-256: d47b37ede6c0eb74dda3bea7a4db531c139ac7eefb554a7cd24b840ae0321dfa

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