Malicious PDF — malware analysis report

Static analysis result for SHA-256 0de279aedcff5781…

MALICIOUS

PDF

65.5 KB Created: 2021-06-11 05:02:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 1a17295b89326c9e34a7b6944f17527a SHA-1: 15342c8464b6e4fedb6c63a418faa7dec288f83d SHA-256: 0de279aedcff57812ecacae324d161472613b11e3293a47720b613093a2f4b74
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the presence of external URIs and the overall structure point towards a phishing or malicious redirection attack.

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://druttle.ru/123?utm_term=song++mr+jatt+kabir+singh PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4459036/normal_6002d0f0c0961.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413454/normal_60b8c56ab6bdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_604b208d47190.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4462339/normal_60b2f5bb03f05.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fevuxowina.pbworks.com/w/file/fetch/144805563/how_to_get_free_v-bucks_in_save_the_world.pdfIn PDF document text
    • http://votekotokuz.pbworks.com/w/file/fetch/144842199/31158018766.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06c31d45-3055-4e94-bb1b-82c3de2f85c3/81036597510.pdfIn PDF document text
    • http://gakuwibed.pbworks.com/f/vizanobobasezimaposixoded.pdfIn PDF document text
    • http://wuwazilizos.pbworks.com/w/file/fetch/144425409/66104599247.pdfIn PDF document text
    • http://ruwezebom.pbworks.com/w/file/fetch/144627471/48250908329.pdfIn PDF document text
    • http://dobifapig.pbworks.com/f/toomics_hack_mod_apk_1.3.3.pdfIn PDF document text
    • http://zajozote.pbworks.com/f/10114421545.pdfIn PDF document text
    • http://risanafupek.pbworks.com/w/file/fetch/144887541/basic_kanji_book_vol_1_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39889da6-b7b2-4a0e-b4d6-cd4781338695/80901628765.pdfIn PDF document text
    • http://gafuxexosaru.pbworks.com/w/file/fetch/144899007/gta_san_andreas_apk_mod_cleo_download.pdfIn PDF document text
    • http://nilanom.pbworks.com/f/3834721541.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a712a137-591f-419b-baaa-590a0fe3455f/balancing_chemical_equations_worksheet_answers_1-25.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/179c555c-d516-4f5e-aac0-7ad57cc401cd/bible_study_quiz_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d8568fc-5b8b-4182-9369-dbe4f243b922/smart_converter_full_version_free_download_with_crack.pdfIn PDF document text
    • http://fisukafetif.pbworks.com/w/file/fetch/144425178/how_to_adjust_resolution_on_lg_monitor.pdfIn PDF document text
    • http://genarozep.pbworks.com/w/file/fetch/144637092/how_to_use_a_canon_mp11dx_calculator.pdfIn PDF document text
    • http://togusan.pbworks.com/f/85491153343.pdfIn PDF document text
    • http://fesatisobif.pbworks.com/w/file/fetch/144960417/17362536845.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_off0000c63a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC63A 5448 bytes
SHA-256: 42f82cb6ea862e1b9cb6d3610ccd26187b2b9acc1549d00aea5faeb7fc1bc39c
font_01_sfnt_off0000d899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD899 9424 bytes
SHA-256: d7d21c8ab02817a916ae984a83e66b7f99f9fc2fb78832c94e08f0b00eb04472