Malicious PDF — malware analysis report

Static analysis result for SHA-256 d19691a756f92e31…

MALICIOUS

PDF

83.1 KB Created: 2021-03-21 05:58:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d9bf2c5fdecf123c982ed5d5a4b7077b SHA-1: 5b17f3ec6842a5fb7b520deb3ea7a7b572f1f2a8 SHA-256: d19691a756f92e313b8373c33d36dd2e5a0cf754d02e8c909607967b93b640a1
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://xezojetit.ru/123?utm_term=calendar+2018+excel+template PDF link annotation
    • http://confirmyourverifiedbadge.com/nikon_coolpix_s3300_specst7c02.pdfIn PDF document text
    • http://voxovisigad.iblogger.org/how_to_make_a_fitted_face_mask_pattern.pdfIn PDF document text
    • http://gejokakop.mygamesonline.org/7144940630.pdfIn PDF document text
    • http://mejumeroxara.mywebcommunity.org/faruweg.pdfIn PDF document text
    • https://jamolirotiwe.weebly.com/uploads/1/3/4/6/134693152/d84b5c20.pdfIn PDF document text
    • https://fodolirikixubug.weebly.com/uploads/1/3/5/2/135297927/5889262.pdfIn PDF document text
    • http://jekefidaz.mygamesonline.org/how_to_do_calligraphy_with_normal_pen.pdfIn PDF document text
    • http://okclub.org/58888066783xtka5.pdfIn PDF document text
    • http://tixshopclub.space/how_to_access_wd_my_cloud_from_amazon_fire_stickrjnpu.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/4624fa3e-f081-48e9-a94d-56c435ca7c58/vodopujufinusoxozefufeved.pdfIn PDF document text
    • http://viwudajokufado.atwebpages.com/sample_contract_agreement_for_services_rendered.pdfIn PDF document text
    • http://zikimopotefeva.epizy.com/taunton_prep_school_uniform_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a116eb75-3bb4-4dda-b4e7-78d60be399b6/hp_deskjet_ink_advantage_2545_driver_download_windows_8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61cff24a-3a00-446c-afc6-1a46cd8517d3/xokorolozuzomire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8556bf53-369a-4154-872a-5714b72f636d/mean_median_mode_and_range_worksheets_grade_8.pdfIn PDF document text
    • http://xegilejefaga.epizy.com/zimavit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebbbf6f1-c55d-4be8-9e6f-e67289166f82/49587883426.pdfIn PDF document text
    • http://maxumuvekem.epizy.com/jososofegokemipa.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/jkbose_datesheet_10th_private_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/torugoxoruvuwovegiduvowex.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_off00010668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10668 5532 bytes
SHA-256: 3f2740cf3cf32a318107f34c70c06721c45f8f0d0e820913e9ef1b04be833bfa
font_01_sfnt_off00011924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11924 11108 bytes
SHA-256: 542d1b96b39e3f308d35c0e401176cb14b33e31188b6c6251907d0f73b261682

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