Malicious PDF — malware analysis report

Static analysis result for SHA-256 8108f25b17e018a7…

MALICIOUS

PDF

76.0 KB Created: 2021-06-07 04:08:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9f8e28cd126447dbe7fded4299f7ff8e SHA-1: 5014c6199cd34f66262088072e3ec6f5eef62e0d SHA-256: 8108f25b17e018a79aebe6b55e81b75ca3d59aa9761a6578e035ee40d5a4b6c9
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable hosting, suggesting it functions as a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://medvor.ru/pbw?utm_term=how+to+link+two+sheets+in+same+workbook PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378836/normal_602eba9e82a23.pdfIn PDF document text
    • https://mowolonob.weebly.com/uploads/1/3/4/8/134874237/fb8b773d.pdfIn PDF document text
    • https://vipamabukaxeban.weebly.com/uploads/1/3/0/8/130874648/livorafazudek_pideniresur_turivafuzasus_wifexuvetubu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368242/normal_602201f92a6b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420600/normal_60160aa233392.pdfIn PDF document text
    • https://wivapofeselaf.weebly.com/uploads/1/3/5/3/135317026/tewosapujurofatatape.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462694/normal_60427d5026535.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374521/normal_5fed06f4b2310.pdfIn PDF document text
    • https://nezemugobif.weebly.com/uploads/1/3/4/5/134519414/7345defea627a0.pdfIn PDF document text
    • https://wededizopi.weebly.com/uploads/1/3/3/9/133986349/moruwenaze_negowatukakadav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kigijujozi.pbworks.com/f/the_tragedy_of_romeo_and_juliet_act_1_cloze_activity_answer_sheet.pdfIn PDF document text
    • http://nusuwoxub.pbworks.com/f/counting_quarters_nickels_dimes_and_pennies_worksheets.pdfIn PDF document text
    • http://ridelox.pbworks.com/f/magifome.pdfIn PDF document text
    • http://jobagej.pbworks.com/f/how_to_connect_presonus_audiobox_to_garageband.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a12a67d-f836-4006-aef6-6bdbff3812f4/kinemaster_diamond_mod_apk_download_free_2019.pdfIn PDF document text
    • http://kokoxudalux.pbworks.com/w/file/fetch/144426942/59937605181.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef7d9251-b1da-4467-bcea-6b09b8694606/principles_of_design_unity_art.pdfIn PDF document text
    • http://polubisoxuwo.pbworks.com/f/tchibo_cafissimo_mini_manual.pdfIn PDF document text
    • http://funesut.pbworks.com/w/file/fetch/144699870/timejujufobowidifunezoj.pdfIn PDF document text
    • http://zapibibilubo.pbworks.com/f/92977329908.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e6c958a-2a38-4dce-b4be-f44aebd0992e/bissell_powerforce_helix_bagless_upright_vacuum_parts.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_off0000eb98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB98 5180 bytes
SHA-256: a6477a729de5266539c0c9fee927f4c6bc7ea0da714e27ae18c2b016212e68a5
font_01_sfnt_off0000fd14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD14 11124 bytes
SHA-256: 532b557d3183ccdbc979a92b1c423db7dd3ff6f0cfcf36c6200de4da9f2812eb

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