Malicious PDF — malware analysis report

Static analysis result for SHA-256 020e2b83bbcc7731…

MALICIOUS

PDF

73.1 KB Created: 2021-03-28 17:08:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 3b70a1a2fb8b8f62ed34df60af63d9f0 SHA-1: 522ac774fdd12883ef986e5c3b06cadf45181436 SHA-256: 020e2b83bbcc77318ea96dc387464e7a9b01045d5642882cf5c5c9642c2b5905
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 an embedded URI pointing to 'kuzutuzo.ru', which is likely part of a phishing or malware distribution scheme. The PDF's structure and embedded links suggest it's designed to trick users into visiting potentially harmful external sites, masquerading as legitimate content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://kuzutuzo.ru/award?keyword=sqlite+complete+tutorial+pdf PDF link annotation
    • http://tarigutese.mygamesonline.org/takubefigoxemajabimof.pdfIn PDF document text
    • http://mozujana.22web.org/flight_simulator_free_for_windows_7.pdfIn PDF document text
    • http://kakorezikudu.mypressonline.com/gedomutatakedaramuvere.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/54f7a8a2-e5d2-4e3d-853e-2c6ea4aeaa35/probability_and_statistics_for_engineers_and_scientists_9th_edition_solutions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a78c1944-bd15-470a-8338-04df8bd82fa4/why_is_my_verizon_router_flashing_red.pdfIn PDF document text
    • http://bitines.myartsonline.com/supewizigiwikamugetifuw.pdfIn PDF document text
    • http://xipudabokodem.epizy.com/how_to_start_modeling_in_blender.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33fcec43-3aa6-4004-b808-5440bba1477a/laduxase.pdfIn PDF document text
    • http://nalejunubotuw.rf.gd/62241164390.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2dcf9d8-d04a-4640-b3d3-85bbbf996f25/dowanekorabirekakejo.pdfIn PDF document text
    • http://wotirazobobag.epizy.com/living_clean_the_journey_continues_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/relative_clauses_exercises_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ecb1e89-1e21-4401-9a04-ec62ff833fce/traxxas_tq_2.4_ghz_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/19436215791.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fd843ae-7446-4758-ba94-31c4cf5bc2a4/fishing_tackle_box_for_crappie.pdfIn PDF document text
    • http://bojedujob.rf.gd/basevamu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e6dfcda-88bb-4cf7-a46a-4636f289b311/family_feud_game_template_online.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/captive_prince_volume_three.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f20e3d51-81b3-490b-8910-2e696c6524e9/ross_carbonite_solo_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/dulevujibukumavobag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4811daf0-e809-4f1f-99d2-c70773381791/7916460269.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/zuworurorivixi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bd6eb67-c886-4e1c-8638-a9caf6c84c76/94190612021.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_off0000de65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE65 5352 bytes
SHA-256: 9016a86861ba057ce99203278ac8b242096e4e9644122f61ea47f303fe08195f
font_01_sfnt_off0000f086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF086 11348 bytes
SHA-256: 8c22e0de0e3b51c8577d5194330a7f9a2244b9a8a05fcbacbba767ce118907ef