Malicious PDF — malware analysis report

Static analysis result for SHA-256 1da5ff45cb69c5df…

MALICIOUS

PDF

71.9 KB Created: 2021-04-30 05:22:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f2c6c29a9f1f44ec706ffa08827ff57 SHA-1: ede703fd7192a19aeb76693568dd1f2b1a14d315 SHA-256: 1da5ff45cb69c5dfeb99a7ea5990db29b1424caa97aa59a01904f64c053d867d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by heuristics as a link farm. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware distribution. The presence of external URIs suggests the document is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://dafemum.ru/strik?utm_term=stand+by+me+%2528spanish+lyrics+pitingo%2529
    • https://cdn.sqhk.co/suwapipejob/ujiibA5/world_cup_2026_tickets_packages.pdf
    • http://dimifepovez.22web.org/29582678138.pdf
    • http://mihetos.xyz/sodulukakogetebodv0tp1.pdf
    • https://cdn.sqhk.co/lomekojop/f1ioiaf/bapumubogu.pdf
    • http://idealica-italiaufficiale.site/12704477858nvnvi.pdf
    • https://dizakevusarebiz.weebly.com/uploads/1/3/4/5/134581037/ximinu.pdf
    • http://boldly-grow.com/nordictrack_audiostrider_800_manual0if7t.pdf
    • http://fallofelin.online/probiotics_for_metformin_diarrheaer2lo.pdf
    • http://gusudula.iblogger.org/dogenezupafufomokezad.pdf
    • https://diwijavel.weebly.com/uploads/1/3/4/6/134691177/45384.pdf
    • https://cdn.sqhk.co/lakekomum/hjddrij/64184019935.pdf
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdf
    • http://bibopasaxuvibu.mypressonline.com/anthropological_foundation_of_physical_education.pdf
    • https://cdn.sqhk.co/gilubibawi/hKhbOYP/62674214501.pdf
    • http://lapivakop.getenjoyment.net/syllabus_of_airforce_x_group_2020_download.pdf
    • http://zazuvivilug.iblogger.org/difitajijabuxuxatogoxij.pdf
    • https://jowewuxutezu.weebly.com/uploads/1/3/4/6/134632231/neroxogewe.pdf
    • http://rajelakitapeki.iblogger.org/ridetumoratumanonas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fozosoripivo.epizy.com/sunosevisa.pdf
    • http://wiwosotu.myartsonline.com/passive_voice_tenses_exercise.pdf
    • http://vepunip.rf.gd/cuento_las_medias_de_los_flamencos_con_imagenes.pdf
    • http://gifidabula.atwebpages.com/how_to_clean_a_clogged_bunn_coffee_maker.pdf
    • http://fijazatomowov.epizy.com/ativador_office_2016_baixaki.pdf
    • http://nerezusilanake.atwebpages.com/finuniditinoba.pdf
    • http://bunisanabasa.epizy.com/bus_game_for_pc_windows_10.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d61e.bin
d3cfffae5338f60929d4dbc131b608f0b69a5fe01fd7d769d1afd35427d2a120		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD61E 5988 bytes
font_01_sfnt_off0000ea62.bin
4ee59fcc9a4ce1a8c26a7d7f0516999af203a3ed9716ebeb428cfbf24caf0fff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA62 12660 bytes

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