Malicious PDF — malware analysis report

Static analysis result for SHA-256 21ad31119e6a635d…

MALICIOUS

PDF

74.1 KB Created: 2021-03-31 08:10:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: bb28c335de780e47ad921c43637be81e SHA-1: 48af4fba9dd30cc87055f41494596bb379251f96 SHA-256: 21ad31119e6a635d42ec6686c632aa92f52d4cb4c8e4c69e7b52ecbb1e7f074d
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, with one specifically pointing to 'bologen.ru/wix?keyword=pikachu+mascot+costume+japan', suggesting a phishing or redirection attempt. The PDF also functions as a link farm, hosting many links on disposable domains, which is a common tactic for distributing malware or conducting phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://bologen.ru/wix?keyword=pikachu+mascot+costume+japan PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415045/normal_6044dd6ccdc0d.pdfIn PDF document text
    • http://rejemezurufoveg.mywebcommunity.org/34241940036.pdfIn PDF document text
    • http://moxilekulina.getenjoyment.net/download_oxford_english_arabic_dictionary.pdfIn PDF document text
    • http://nejevefivi.mypressonline.com/jogamerirak.pdfIn PDF document text
    • http://poxumanavofeboz.scienceontheweb.net/11826842041.pdfIn PDF document text
    • http://befotuke.mywebcommunity.org/is_the_galaxy_a10e_a_good_phone.pdfIn PDF document text
    • http://zopesozali.mypressonline.com/70636262271.pdfIn PDF document text
    • http://kunozoxutokusu.mygamesonline.org/manual_formulas_excel_2020.pdfIn PDF document text
    • http://tawaguf.scienceontheweb.net/three_quarter_view_face_drawing.pdfIn PDF document text
    • http://mevesepegubisis.scienceontheweb.net/add_bookmark_mac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420902/normal_6057efcabf006.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450151/normal_5fed53478c5a3.pdfIn PDF document text
    • http://wobafobigo.mywebcommunity.org/corporate_social_responsibility_and_stakeholders.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://supajiwa.myartsonline.com/data_mining_techniques.pdfIn PDF document text
    • http://doxokalisawe.myartsonline.com/evicted_book_genre.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/965c7de3-e248-4ae9-adde-77683021a107/81931815426.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f05d998-7177-4463-b351-acda2500c6e8/detoli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3712ef6-d8f7-4d8d-bd5a-c561d6f663f4/siwokozogopojefobebo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea485743-1847-4a6a-b8a1-e127ab96b347/riburiruvufanomu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2a1d1d9-73eb-43d4-9752-bd4515a14699/21591035894.pdfIn PDF document text
    • http://sarutufasiko.atwebpages.com/dakur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/634529fc-e014-4a01-bb16-34ceb5156f0e/sopinizovufumipika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c90fdc09-acaf-4258-9da9-d28bc8f6ffa4/how_to_light_pilot_on_gas_water_heater_honeywell.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2388a8b0-c608-4646-a105-22dbe5155bab/wazunutosufibexize.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43d1fb0e-9b4b-4cd0-a10d-e2053c36b485/what_is_it_called_when_you_have_no_conscience.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_off0000e323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE323 5188 bytes
SHA-256: 11419fd28d32d2648e90ca9a8e8fa3ab05b49e7cf9ec86d36ca2fabcacc219b9
font_01_sfnt_off0000f4ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AD 11300 bytes
SHA-256: 46082691ccb3cd69d9fb5c8710a133221cf52cd3bc6bbf2b67773e75070084bd