Malicious PDF — malware analysis report

Static analysis result for SHA-256 48319a0e6aaedceb…

MALICIOUS

PDF

70.3 KB Created: 2021-02-13 18:57:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: cfb683f8b57e60ebf77dab86e9abab30 SHA-1: 2723b2f31c10c8581ce5fde5fd477daba9e9f75a SHA-256: 48319a0e6aaedceb91ec858828f04e4c4e937598e80717bd45e5d98177497b2c
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, a technique commonly used for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wix?keyword=future+problem+solving+scenarios PDF link annotation
    • http://gezowipefu.22web.org/wrapping_paper_sheets_australia.pdfIn PDF document text
    • https://cdn.sqhk.co/wuwexosul/8LIwjc9/garfield_rush_apk.pdfIn PDF document text
    • http://sudebatuwilazet.iblogger.org/aashiqui_2_full_movie_bolly4u.pdfIn PDF document text
    • http://moekolechko.icu/taxitadelojigajiteaa9hb.pdfIn PDF document text
    • https://cdn.sqhk.co/jefapukawore/W0Ygohe/rich_and_famous_apartments_indira_nagar.pdfIn PDF document text
    • http://rigovutamejebum.iblogger.org/pandoc_markdown_to_font_size.pdfIn PDF document text
    • https://cdn.sqhk.co/zolaxadivowe/BjjB74w/36850788128.pdfIn PDF document text
    • https://cdn.sqhk.co/gimexigerub/igljijg/real_car_parking_2_hacked_apk_download.pdfIn PDF document text
    • http://radanukodufam.22web.org/chegg_q_a_answering_guidelines.pdfIn PDF document text
    • http://gojovobikazed.iblogger.org/amphitryon_ignacio_padilla.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rewogaki.rf.gd/manugepawav.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/73927681858.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/93700826333.pdfIn PDF document text
    • http://nazonuretowu.epizy.com/final_fantasy_8_remastered_gf_guide.pdfIn PDF document text
    • http://gonapubofolok.epizy.com/36676632850.pdfIn PDF document text
    • http://pomababotesu.rf.gd/pixabay_apk_pro.pdfIn PDF document text
    • http://gamupuzif.epizy.com/zuraliluju.pdfIn PDF document text
    • http://faruvesisok.rf.gd/bathukamma_songs_telugu_lo_ing.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/bosironusivifojivex.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_off0000d609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD609 5408 bytes
SHA-256: 1792f1eeb691b7b5ac121dab07aaf194e87ed7adb0edfc1f933cb248bf19d675
font_01_sfnt_off0000e861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE861 10512 bytes
SHA-256: 90f291a60bc3a7d0edeee1257d83505753ac0c41b1f89580e0c72bbdb87d904e

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