Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eae358d7b8ae014…

MALICIOUS

PDF

76.2 KB Created: 2021-03-17 08:24:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 70ffa2e6e4cff35585834500ba9b6fbf SHA-1: 27d60334d0338bb68d660c7c1a5fafcc95e6cced SHA-256: 2eae358d7b8ae0147729e7a255875fc705f29ea7182d15fc47face6d7c96d248
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to disposable domains and are likely used to redirect users to malicious content or phishing sites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a pattern of using numerous links on disposable hosting, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/award?keyword=geometric+figures+and+formulas+pdf PDF link annotation
    • http://rmk4sale.xyz/kifosomajmri7j.pdfIn PDF document text
    • http://hookup754.fun/what_is_the_moral_of_the_lion_the_witch_and_the_wardrobes69w1.pdfIn PDF document text
    • https://cdn.sqhk.co/niturunajik/XjalCs5/author_website_templates_wix.pdfIn PDF document text
    • http://mujabelor.mywebcommunity.org/contabilidad_de_costos_industriales_ejemplos.pdfIn PDF document text
    • https://cdn.sqhk.co/boxepupovemu/jggZkUj/89197943223.pdfIn PDF document text
    • https://cdn.sqhk.co/tifapoxur/iVhfPii/87540720560.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/dpRSepr/nalomumi.pdfIn PDF document text
    • http://mandarins.space/tewowalorekibam0t6ce.pdfIn PDF document text
    • https://cdn.sqhk.co/mofekuma/hogfhed/bowl._com_log_in.pdfIn PDF document text
    • http://haifaiv.ru/53876489098hbi43.pdfIn PDF document text
    • https://cdn.sqhk.co/nupasoxure/XXGrgdu/roblox_zombie_games_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/rawuredilu/3MjbWqw/semicolon_and_colon_quiz.pdfIn PDF document text
    • https://cdn.sqhk.co/wafexumu/z4chfhh/clown_neighbor_granny_escape.pdfIn PDF document text
    • http://rineset.xyz/wiberifalutujedqelb.pdfIn PDF document text
    • http://kixiwogazu.sportsontheweb.net/beats_studio_wireless_3_price_philippines.pdfIn PDF document text
    • http://lapiwudoxavov.scienceontheweb.net/a_case_in_point_book.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/561f8d76-ca5f-4808-bfef-16bf34377756/basic_wireless_communication_system_block_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/tilokobapiziz.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/how_to_connect_plantronics_c054_to_laptop.pdfIn PDF document text
    • http://wutejaxevewef.myartsonline.com/63061581267.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0833e436-454d-49ac-870b-0312916c2a01/irobot_roomba_670_robot_vacuum_r670.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe26dbe9-7854-442d-a10a-e887d06ee5b1/bidomerowakozewa.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/how_long_does_it_take_to_learn_3d_modeling.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/dexofuke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dec09e4-9f15-4593-b504-369be42fc704/how_to_lose_weight_by_cutting_calories.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/xuputeluzeneb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fbb90d8-53ac-4bfc-a8ce-3512212f8309/true_colors_personality_test_green_meaning.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_off0000eb41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB41 5508 bytes
SHA-256: 88b7abde6956fd3d23a52d92a03f0273a6d829be4a4ff584ed235d2371cc95d1
font_01_sfnt_off0000fde9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE9 10740 bytes
SHA-256: 9203f3066c5fa71cb36fab85f570426f0cda9177a177a3f75d9bc5b2ee5f7aa8