Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccee10cd8e73b6c1…

MALICIOUS

PDF

68.6 KB Created: 2021-04-01 13:49:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: da2cf1539ec620915e4b0850309b2fc2 SHA-1: 2d164fab818b44d7a13c5cc2b0119949028baf0e SHA-256: ccee10cd8e73b6c14a470d549160b4612681a8d7839681fe913254a3235cff5f
126 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 numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to a search query, aiming to trick users into clicking on these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jumiwimov.ru/strik?utm_term=does+lenovo+tablet+have+bluetooth PDF link annotation
    • http://pudumumununi.22web.org/body_for_life_diet.pdfIn PDF document text
    • http://4338bacchus.com/91934722455ik3hi.pdfIn PDF document text
    • http://rawoferifexa.22web.org/3d_effect_video_clips_free.pdfIn PDF document text
    • http://tepugorotewole.medianewsonline.com/how_to_lose_weight_fast_with_indian_diet.pdfIn PDF document text
    • http://kixurox.getenjoyment.net/lozosipu.pdfIn PDF document text
    • http://euroshopme.site/autodesk_3ds_max_2010_crack_freewzqao.pdfIn PDF document text
    • http://naworigexoz.iblogger.org/que_es_uniformemente_acelerado_en_movimiento.pdfIn PDF document text
    • http://kivedunorujuw.66ghz.com/approaches_to_the_study_of_leadership.pdfIn PDF document text
    • http://pakirekugep.scienceontheweb.net/52472858251.pdfIn PDF document text
    • http://ru-dev.xyz/a_child_s_christmas_in_walesg335h.pdfIn PDF document text
    • http://exampl1214.com/example_referee_report_for_job_applicationwn5o9.pdfIn PDF document text
    • http://odemebayisitrafik.com/private_international_law_textbookn7d1d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5a11eff3-0c7a-45dd-bb89-060d4d4d2060.filesusr.com/ugd/72216b_c888b871991141ed957b07cc7d86640f.pdf?index=trueIn PDF document text
    • https://88211235-bf86-4d40-a6ec-a052db2f682e.filesusr.com/ugd/94e5ef_605d3502f39f4935a440161901974fee.pdf?index=trueIn PDF document text
    • https://8a5a474a-a671-4857-921d-d1df0ee72544.filesusr.com/ugd/523716_75efd3a1932841d58092a8889f64be9b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4afce83-95c4-4e3e-84b8-ab957c205ed8/panchatantra_stories_book_in_telugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3eb72ed9-d1a8-4191-819d-29320e77943e/astro_a20_wireless_headset_setup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67a25aef-c994-4f3a-9484-19ee79783db6/vunidesumupixezanenuvus.pdfIn PDF document text
    • http://zepizevut.atwebpages.com/carbon_cycle_worksheet_ks3.pdfIn PDF document text
    • http://kexafaxepel.epizy.com/ahmadou_kourouma_livres.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/545ba312-70a1-4e72-85c6-4ebfe5c7d606/17_indisputable_laws_of_teamwork_workbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8fd3794-e91d-4d57-a5f0-2f12ab35caec/what_is_solvency_ii_pillar_2.pdfIn PDF document text
    • https://203e60c5-e32a-4587-ab6d-31d66de6d5b9.filesusr.com/ugd/014c36_35bcd3fbe2c0409c97a375ca30ea59a5.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_off0000ccf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF3 4876 bytes
SHA-256: 17b751c6bbfbb5fab902b539dac1bffb4104d9ff0e0b9d672fb5db898465477b
font_01_sfnt_off0000dd8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8F 11020 bytes
SHA-256: 4f3d3fc7ff450a4232395b1dbef4f0caa2866522d3fcd8225d60219ee809078a