Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf4f7621c4e6c88f…

MALICIOUS

PDF

66.9 KB Created: 2021-02-13 05:38:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 90f298a0f1e33862e1defea2a3c2f337 SHA-1: b7b71ed3c8451c4ba828042afb1c3d61687ad241 SHA-256: cf4f7621c4e6c88fc5ade319f8d5e9b6c76349e7f6c1def33948b468e8b9e063
126 Risk Score

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://baarspo.ru/wix?keyword=fertilization+process+worksheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4492897/normal_6001c6105b136.pdfIn PDF document text
    • http://sosutisokalelul.iblogger.org/google_site_reliability_engineering.pdfIn PDF document text
    • https://cdn.sqhk.co/nupozifulija/jugjjid/mupaxizirikowapinof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lumuwejonalar.epizy.com/59114901975.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/guide_to_secondary_loan_market_transactions.pdfIn PDF document text
    • http://numadipabep.epizy.com/dixegeka.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/sixth_sense_technology_seminar_ppt_free.pdfIn PDF document text
    • http://neropexuzex.rf.gd/vukerimalavunuwum.pdfIn PDF document text
    • http://vejimugar.epizy.com/spring_cloud_tutorial.pdfIn PDF document text
    • http://ritanuwo.epizy.com/t_shirt_template_free_online.pdfIn PDF document text
    • http://mujunuge.rf.gd/new_bollywood_movies_hd_2018_free.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/89537803381.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b7a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7A0 5184 bytes
SHA-256: 36f727d4176c83f57161d78d092c8ea211f75f04125dba619d896693cb82fe93
font_01_sfnt_off0000c952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC952 9496 bytes
SHA-256: 91b1af52722679379a21880fd84bb35b6f1ceb3578dc149c4c81ddf44338d2a7
font_02_sfnt_off0000ea02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA02 16080 bytes
SHA-256: 014fdb7076ebfc326e48e50914f0077be73d9a972b327c9fef30e9d59f054234