Malicious PDF — malware analysis report

Static analysis result for SHA-256 0493edba8cb56876…

MALICIOUS

PDF

74.3 KB Created: 2021-03-18 01:53:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 20787f72573385ac683e169b45db93d9 SHA-1: 2054776bd02d6a7a5ca9fd57c37d67eebe014467 SHA-256: 0493edba8cb5687657d722b91b65be6e8560131f1f0781c871d8c9feeff7bdff
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous embedded URLs, with a primary focus on redirecting users to `https://nipisod.ru/strik?utm_term=schlage+deadbolt+lock+battery+replacement`. The document body, though heavily obfuscated, appears to contain keywords related to the lure, suggesting a phishing campaign disguised as a search result or informational document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://nipisod.ru/strik?utm_term=schlage+deadbolt+lock+battery+replacement PDF link annotation
    • http://senogibe.iblogger.org/death_note_live_action_2015.pdfIn PDF document text
    • http://xajoraxi.22web.org/afro_asian_literature_download.pdfIn PDF document text
    • http://jezonikiroka.mygamesonline.org/weputoz.pdfIn PDF document text
    • http://sabujunakeves.iblogger.org/3544794465.pdfIn PDF document text
    • http://nemugub.mywebcommunity.org/collinearity_diagnostics_of_binary_logistic_regression_model.pdfIn PDF document text
    • http://sokixatov.mywebcommunity.org/nutritional_information_on_taco_bell_chicken_chalupa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e0eedba4-cf99-4c42-97f5-d3f9ae5832dd.filesusr.com/ugd/e36ea7_ae816f7a21f04bd292c628d960070f7d.pdf?index=trueIn PDF document text
    • http://tuzotulerijenej.rf.gd/6592957075.pdfIn PDF document text
    • http://gafomawonerif.rf.gd/statistical_process_control_charts_template.pdfIn PDF document text
    • http://winikejotediteg.rf.gd/how_to_fix_the_brake_on_a_poulan_chainsaw.pdfIn PDF document text
    • https://88749095-6fd7-453f-8e8a-15b48fe47dd1.filesusr.com/ugd/e4d7df_3ba6aec0f1f045778921b0ee4a1fb564.pdf?index=trueIn PDF document text
    • https://9f7573d5-7b83-49a5-9b97-b0679d2fa1e3.filesusr.com/ugd/891219_cab9badabbfe4eb2848e3e3378b7a2c5.pdf?index=trueIn PDF document text
    • http://bexufomadixin.rf.gd/hp_photosmart_d110a_driver_windows_7_64_bit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9132688c-ef74-42f1-ab19-380adb04c4f9/subshell_electronic_configuration_of_first_20_elements.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9f56d54-fbe9-4879-9663-a0757d945032/26143642284.pdfIn PDF document text
    • http://nekumimo.epizy.com/bissell_symphony_pet_all-in-one_vacuum_and_steam_mop_canadian_tire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a72860f-fdef-4761-8417-916394fde3f9/wd_my_passport_ultra_not_showing_up_windows_10.pdfIn PDF document text
    • http://konevimojo.epizy.com/best_ebook_reader_for_pc_free.pdfIn PDF document text
    • http://jawafezirosozo.epizy.com/64375908058.pdfIn PDF document text
    • http://gosaduzunake.myartsonline.com/que_significa_taller_en_espaol.pdfIn PDF document text
    • https://53f03ce6-db0b-4f41-9bfc-6956ba41e1f4.filesusr.com/ugd/727e0f_480471d1fed946e68e54f73c569b459a.pdf?index=trueIn 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_off0000e5fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FD 5720 bytes
SHA-256: bfb13b4930fb31bf246eb2291930b2439213b2384ab3162689028c3e034dde7e
font_01_sfnt_off0000f94c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94C 10032 bytes
SHA-256: c88fb9fc5b7e9426d4a16174d560a42aa605b4523e170bc97baeb9ed3d338021

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