Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bfeb84082788039…

MALICIOUS

PDF

79.1 KB Created: 2021-03-14 14:44:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 49faba2118b89eaba6d48effc83d1b53 SHA-1: 96d9f1de333d3d197a6a86b055b12aa469c6b3fe SHA-256: 0bfeb8408278803933086ad1182d4849efb8810e5e815488164c4bdbfaa10f37
126 Risk Score

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 0.9998

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/strik?utm_term=2019+gartner+magic+quadrant+for+analytics+and+business+intelligence+platform PDF link annotation
    • http://sunugukumota.getenjoyment.net/the_art_of_communicating_thich_nhat_hanh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462730/normal_5fd3407cd90cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476270/normal_5fd64da674ee4.pdfIn PDF document text
    • http://kitukotobov.medianewsonline.com/ez_bow_maker_instructions_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383450/normal_5ff41fc413f18.pdfIn PDF document text
    • http://tamekawarol.66ghz.com/incident_report_example_writing_childcare.pdfIn PDF document text
    • http://bosuxezaxad.mypressonline.com/larumivapuwedibabenilix.pdfIn PDF document text
    • http://bajelow.iblogger.org/ctfa_microbiology_guidelines_2013.pdfIn PDF document text
    • http://rejasikega.scienceontheweb.net/sonic_sausage_breakfast_toaster_nutrition_value.pdfIn PDF document text
    • https://cdn.sqhk.co/rekutadis/iOZgfwj/singing_in_the_rain_full_movie_free.pdfIn PDF document text
    • https://cdn.sqhk.co/kajutizikodu/o3A7Hge/35260077912.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mofomunor.rf.gd/zuvibuvuxisep.pdfIn PDF document text
    • http://sefibonep.rf.gd/excel_vba_message_box_yes_no_options.pdfIn PDF document text
    • http://zokitamuna.epizy.com/43112866465.pdfIn PDF document text
    • http://suzowow.rf.gd/65694982599.pdfIn PDF document text
    • http://butaxogusevi.epizy.com/20952947110.pdfIn PDF document text
    • http://sukuvafeliji.epizy.com/chogada_with_lyrics_song_free.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_off0000f0fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FC 6232 bytes
SHA-256: 7f164354644d9e0316e0dac171fc0f71b158ce8b0e8d12e740804982eb49db68
font_01_sfnt_off00010619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10619 11792 bytes
SHA-256: 1e72bc984102817b3db86ef80968cb0de79a250a3f9a244b1e38c7be2c68a575