Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a34ebfbd82436ef…

MALICIOUS

PDF

74.0 KB Created: 2021-03-10 20:27:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e5fcb1d26c78a5e8d20b2045bfb56c78 SHA-1: 206c0457fac2d83e70904be859a897a7ad2aa9de SHA-256: 2a34ebfbd82436efb29fa5aa7aaac8c1abcc3d5b26c6ef5ad258a1c9e69e21f9
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 0.9995

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/wix?keyword=finn+balor+contract+chaos PDF link annotation
    • http://frontglass.xyz/9029558098onkzr.pdfIn PDF document text
    • http://sagedix.medianewsonline.com/how_do_you_draw_out_a_blind_pimple.pdfIn PDF document text
    • http://ontrade.top/40582826066o2p2x.pdfIn PDF document text
    • http://zabolojisag.getenjoyment.net/symbolic_form_logic_calculator.pdfIn PDF document text
    • http://fdvsefwfrw.space/emotions_vocabulary_sheethom0d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458824/normal_5fe44a9537aff.pdfIn PDF document text
    • http://resipowepo.getenjoyment.net/41320853429.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380859/normal_6019352e42ea8.pdfIn PDF document text
    • http://pazadixokumox.sportsontheweb.net/management_science_and_engineering_degree_undergraduate.pdfIn PDF document text
    • http://veruvipavopa.getenjoyment.net/the_merry_adventures_of_robin_hood_chapter_4_summary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444104/normal_60379259ba4fc.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/1465c074-807a-4cef-98a9-e9cf6656ae2c/cbt_therapy_activities_for_depression.pdfIn PDF document text
    • http://kusofiwu.epizy.com/benaam_badshah_hd_video_songs.pdfIn PDF document text
    • http://vatetore.epizy.com/noronegariloxusefu.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/ncaa_division_2_womens_basketball_tournament_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a94bed6-1387-41ed-b47e-c470810b9274/best_books_for_12_year_olds_classics.pdfIn PDF document text
    • http://nenujogi.rf.gd/beyond_brawn_download.pdfIn PDF document text
    • http://lozefedewi.rf.gd/91902872911.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd3c62dc-3cc1-4dc2-867f-aaaf5991fa75/lexus_rx_350_price_in_nigeria_2012.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/cognos_report_studio_11.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88bd914f-f2f3-45f6-a8a3-f4f1d08cfa80/88405322385.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cb00a9b-de70-49e0-9762-5882022be43f/20506030817.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_off0000e5f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F1 4980 bytes
SHA-256: 8a6b0570086316d1a957e65eb489dfc160278dcfe6bb8793c47980cc9d57e3dd
font_01_sfnt_off0000f6da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DA 10492 bytes
SHA-256: b7066c14523f52da36fc029c3fe7368c4d923f2938b81c0a6a7aff8510d50120

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