Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dffaa23bdf2d2ba…

MALICIOUS

PDF

70.7 KB Created: 2021-04-05 22:46:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 5ab5f72b9eaf874f41fbee85d157378d SHA-1: 98871bf751e96bd7cfeb0de0901417d244936f71 SHA-256: 7dffaa23bdf2d2ba0ef9efd2a7adf04d80ba2a80375e47e82ed1c78a2a445464
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of external links, with one prominent URL pointing to 'dugedepap.ru', suggesting a link farm or redirection mechanism. The presence of numerous PDF links and the file's structure strongly indicate an attempt to direct users to potentially harmful websites.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dugedepap.ru/strik?utm_term=dark+souls+2+gold+pine+resin PDF link annotation
    • http://optamorem.com/kodak_easyshare_dx6490_manual7s7sr.pdfIn PDF document text
    • http://ibkreactiva2020.com/fotokelabupy10su.pdfIn PDF document text
    • http://zeropium.com/how_to_see_formula_in_excel_2010er8a1.pdfIn PDF document text
    • http://iclod.tech/warcraft_3_reforged_vs_frozen_thronei6cxc.pdfIn PDF document text
    • http://salebox.shop/closed_syllable_worksheets_for_3rd_gradekiorl.pdfIn PDF document text
    • http://mini-cam-v2.club/advanced_excel_books_free_download_in_hindi1zrfp.pdfIn PDF document text
    • http://wegansit.space/was_it_a_dream_guy_de_maupassant_answer_key8c64b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2f60c0de-bae8-48d8-8f3f-ce7907f87c52.filesusr.com/ugd/badafb_d55cd5baeced484db8bf76cc693892fb.pdf?index=trueIn PDF document text
    • https://66547991-fb4b-492c-b271-2b6457db34f0.filesusr.com/ugd/a98e70_e605ab38881d40e3a426b59d1a9ceade.pdf?index=trueIn PDF document text
    • https://98e80eac-0673-4bf9-a3de-4132461903b3.filesusr.com/ugd/1acd69_1e5a5e016d0e44619339a52bae174fd4.pdf?index=trueIn PDF document text
    • https://98e80eac-0673-4bf9-a3de-4132461903b3.filesusr.com/ugd/1acd69_a5f3eb775f5240fa81dd48d05f2c70b5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wozoxub/life_fitness_9500hr_elliptical_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/hmdx_jam_party_speaker_charger.pdfIn PDF document text
    • https://8a6b9437-e7f2-49d7-8c24-351b272aa67a.filesusr.com/ugd/b18e4d_2bf03899c96d4d8e8b4c6fb4660ab212.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pafexegud/lista_de_verbos_mas_comunes_en_ingles_y_espaol.pdfIn PDF document text
    • https://f8ba888e-8f71-4fde-8303-550399648f4e.filesusr.com/ugd/17ce20_d1735c92f42e4687abfda9abff7caaa4.pdf?index=trueIn PDF document text
    • https://4e33067b-0f13-4bed-bb9c-ea95f768fd7c.filesusr.com/ugd/23924c_fa422a30b94a4adc8252398bebf03e29.pdf?index=trueIn PDF document text
    • https://98be45bc-63b9-4117-aff7-84a3d4f2c4a0.filesusr.com/ugd/90c678_c88d6e4163ee4c75bab6dec82301aee5.pdf?index=trueIn PDF document text
    • https://4dcfe184-cd6c-48f8-9f23-5461c743a1d4.filesusr.com/ugd/cc8533_0cfe318a022e45dbaea806a946c21368.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/learn_english_feel_good_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/metallica_movie_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/lavirozineta.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/gikuwegopubalan.pdfIn PDF document text
    • https://952d9f4b-853a-4e85-af28-23c4d489d487.filesusr.com/ugd/8db125_cfd6239024224bd39669cf6e08e02dde.pdf?index=trueIn 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_off0000d5fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FC 5320 bytes
SHA-256: 09c43813070f4b881c1ff77a6e8682d7ac4e9a8763be317d37491d8211af2cba
font_01_sfnt_off0000e831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE831 11228 bytes
SHA-256: 72d174fab10e6e3f3119807fd70c78d44068c10a983ba91f6551e344ee47772d

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