Malicious PDF — malware analysis report

Static analysis result for SHA-256 5718f50321505e29…

MALICIOUS

PDF

79.3 KB Created: 2021-04-05 13:50:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 582a2160194e3f3aace0e5b10e8d43e8 SHA-1: d3a96d13e4b71ba230b9d1e1e5fd195fc83d853c SHA-256: 5718f50321505e29f3378c9aa259549808b949af250f5beb9cd83e6e873338ab
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with a primary suspicious URL pointing to 'maypoin.ru'. The PDF's structure and the presence of multiple disposable hosting links suggest an attempt to obfuscate the true malicious destination and evade detection. No scripts were extracted, but the overall pattern indicates a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://maypoin.ru/123?utm_term=admin+template+github PDF link annotation
    • http://giwitijudaleka.mygamesonline.org/nadokupibilina.pdfIn PDF document text
    • http://forovasax.medianewsonline.com/54335865652.pdfIn PDF document text
    • https://cdn.sqhk.co/sobekalob/mOgduhg/nyc_traffic_cameras_gw_bridge.pdfIn PDF document text
    • https://cdn.sqhk.co/vawapisoxe/nKjjhhc/bike_race_king_game_free_download.pdfIn PDF document text
    • http://posebakuxosafod.getenjoyment.net/60006582380.pdfIn PDF document text
    • http://zawuruliwisevo.iblogger.org/lol_adc_advanced_guide.pdfIn PDF document text
    • http://dizurexemubegog.mygamesonline.org/85755473293.pdfIn PDF document text
    • https://cdn.sqhk.co/gejupajo/jgjhgeJ/236975467.pdfIn PDF document text
    • https://cdn.sqhk.co/vefapatape/f4YijYX/43074126861.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kopuperoki.epizy.com/remogeju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aba325c4-8369-4e32-a07c-3a63fc173ec4/how_to_make_price_comparison_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b32e5cdd-0a51-4248-965c-215a59a4c4f7/85616555564.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29fb7a1d-5e85-40bc-b46e-a37c5064520d/55603063139.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9e0d6e1-4eef-4d47-bec0-d4fea16a27cb/was_catholicism_or_christianity_first.pdfIn PDF document text
    • http://fijoxim.epizy.com/84584824612.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f899cd17-d76c-46a7-bcf9-972607335bf9/trigonometry_formulas_table_properties_and_how_to_solve_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b3f04e2-d0f0-4331-a1ca-c9f18361b0c7/satipatthana_sutta_analayo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21dfae6e-35df-45a5-8481-ca00258c75d1/nalig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ee5c67c-37aa-49db-90ad-4e3a7d57e0a6/what_are_the_five_books_of_the_torah_in_hebrew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b558421b-8a05-4972-89c6-4126a2f70bca/52118781446.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bace25aa-07c0-48ab-9274-7e9735f53245/war_horse_cast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0567ef90-4ae2-4210-b6ea-0a6e4e80bd83/the_distance_between_us_chapter_6_summary.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE829 3912 bytes
SHA-256: 5364a1919c144a76f4e26c8119d0979e2c41cde2685cd19c5d54f639302e6aca
font_01_sfnt_off0000f605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF605 5228 bytes
SHA-256: 4be6ff8e83933c3f0699008b6e09b4356818744bee4b9fe7d2faedde8090ac81
font_02_sfnt_off0001079f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079F 11676 bytes
SHA-256: 52eab93f4f082ab2e90918b2dfc403509e12ef69a0fd0a301d7c915b1866724b