Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1e18b85177a1379…

MALICIOUS

PDF

78.1 KB Created: 2021-03-29 16:36:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d96bb8c9d465540ad0ac63e8a5387a9a SHA-1: 17912a85ea3eab785807f81339a7ab33fb8405bc SHA-256: b1e18b85177a1379370cb2b73337ba899a4d12f67591d7ac235858806d9ccc80
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 0.9998

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://lozipotod.ru/123?utm_term=%25D1%2581%25D0%25BA%25D0%25B0%25D1%2587%25D0%25B0%25D1%2582%25D1%258C+%25D0%25B2%25D0%25B7%25D0%25BB%25D0%25BE%25D0%25BC+bonetale+android PDF link annotation
    • http://gerda-msk.ru/hildegard_of_bingen_alleluia_o_virga_mediatrix_listening_guides1it1.pdfIn PDF document text
    • http://igme.site/weraxagiwuvc993.pdfIn PDF document text
    • http://mon-compte-cmb.best/film_basara_heroes_24fn6e.pdfIn PDF document text
    • http://vabademajelid.iblogger.org/treatment_for_auditory_hallucinations_in_the_elderly.pdfIn PDF document text
    • http://vanlit.ru/walls_of_babylonax92q.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/aeefa8d8-1f94-4ea0-9b08-2f616d826eaa/71193854294.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d24b1017-7f61-4d6a-b2d7-40e9fe9b5209/how_to_program_a_tork_rz307_timer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/482f02f6-ef89-47a9-96e0-153e2ab14c7e/how_to_download_gta_5_on_xbox_one_for_free.pdfIn PDF document text
    • http://ludilisi.epizy.com/weromelusela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73228e59-3d2d-404f-8a2b-82a6ccc8d127/19926281472.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abf44fe2-b369-4555-9a27-b041cb047ad6/20233744101.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f7d098f-45e1-4adc-b9a3-01731a5ba21d/body_champ_inversion_table_setup.pdfIn PDF document text
    • http://wanukunu.epizy.com/53379527554.pdfIn PDF document text
    • http://kukuvil.epizy.com/catalog_design_template_free.pdfIn PDF document text
    • http://vufositediv.epizy.com/fuvumusiwabi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92b450db-e9f0-4594-ae04-b81513f1e217/hp_officejet_6500a_plus_web_service.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed1daf20-3333-4e92-85bd-fd1a1c0ee7b2/the_main_idea_and_supporting_details_in_nonfiction_text.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e09980a-ef9f-42cc-ad71-65c13279131d/99527749374.pdfIn PDF document text
    • http://wilurimidolajej.rf.gd/neil_degrasse_tyson_ice_age_character.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE845 5916 bytes
SHA-256: 3344e67bc79319b48a82090f8a2f6980e7cb81b5168f27923ee20c3aeb996930
font_01_sfnt_off0000fb48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB48 14576 bytes
SHA-256: b7131d208174c12d012097efc8c2c8b0c5bde2c1fb959ff4a4a0fc25c7db9625

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