Malicious PDF — malware analysis report

Static analysis result for SHA-256 a48a975eef13b9da…

MALICIOUS

PDF

74.5 KB Created: 2021-03-16 09:18:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 98bb1c632405a062c584d777aeef2742 SHA-1: c40aba2655803af53ab4e999505254b3bb910155 SHA-256: a48a975eef13b9daa3a832957b7d379d7300cd8e3a8735fcda7566af717bba0f
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain ('leonvi.ru') that is likely used to host malicious content or phishing pages. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to appear as a link farm on disposable hosting, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://leonvi.ru/wix?keyword=cambridge+latin+answers PDF link annotation
    • http://mumolazesinidix.getenjoyment.net/14559685944.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489422/normal_5ff977f257517.pdfIn PDF document text
    • http://neo-tp.ru/231238552392eic8.pdfIn PDF document text
    • http://duvejajenivogik.getenjoyment.net/maytag_maxima_x_washer_manual.pdfIn PDF document text
    • http://gnoogle.site/best_female_names_in_ethiopia8i8z6.pdfIn PDF document text
    • http://jotitojimo.mygamesonline.org/betes_2_mg_bula.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479446/normal_600a3e79e3b98.pdfIn PDF document text
    • http://lg-supportteam.com/521771824336vw7t.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446773/normal_60009f682688c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369522/normal_5fced65cc092d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/0a567836-fd33-4c19-865a-75848ae0e2e4/the_art_of_acting_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe991c88-c1d2-4f5c-b7f3-a1fab1e39435/the_raven_poem_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39b71421-40d1-43cf-923f-d42c5bb1f583/1994885843.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5a470ed-044f-45b2-a3d5-969a20f932af/how_to_get_free_final_cut_pro.pdfIn PDF document text
    • http://vakogez.myartsonline.com/16650396645.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1f0b930-61b2-4d54-bf55-eaa2cdb9ce0d/red_hot_itchy_spot_on_leg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/960cc868-6785-4288-9bf9-8eaca6d94c2f/12905052780.pdfIn PDF document text
    • http://wewamamewiler.atwebpages.com/inteligencias_multiples_definicion_y_caracteristicas.pdfIn PDF document text
    • http://sisufovofow.atwebpages.com/aroma_6_cup_digital_rice_cooker_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a75d19d-c83f-4d41-81ea-7556f3cb4135/what_to_give_for_boss_birthday.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9aef0af-9798-4ae5-88fd-3331ab161b00/c_programming_program_design_including_data_structures_8e_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a5950d3-6560-49de-b984-a0898909e85e/jeganafedepezusepedekit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27a37c91-7553-417f-a7a7-80e5403ce250/kumolexatik.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_off0000d63c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD63C 5080 bytes
SHA-256: 513224bd89d36e620fd2324abdf171c09967e2f96a18c7261ebfbe29df53d5ed
font_01_sfnt_off0000e775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE775 10988 bytes
SHA-256: 8ac23a0e30f6695539f2bf0da2b1389b3e8c0315c793b49125dace1dbd530e62
font_02_sfnt_off00010cd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD7 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3