Malicious PDF — malware analysis report

Static analysis result for SHA-256 c61faab77fa49b01…

MALICIOUS

PDF

70.1 KB Created: 2021-02-17 06:41:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 7ecc61cb57b5a22fd284e93913beee24 SHA-1: 8ad07bd40d71d61b8742659bd386200acba188cd SHA-256: c61faab77fa49b01a9a98998a7c37823ac05b184147642586460bed6df3eb5b9
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, pointing to various domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/123?utm_term=is+green+eye+color+rare PDF link annotation
    • https://cdn.sqhk.co/sobexofap/a8jiYgj/snes_roms_for_android_phone.pdfIn PDF document text
    • http://runivofo.iblogger.org/1123760555.pdfIn PDF document text
    • https://zideloxilatomi.weebly.com/uploads/1/3/5/3/135325243/pivezunet-zazasu.pdfIn PDF document text
    • https://cdn.sqhk.co/kadeposamo/NEji9bk/lego_super_mario_character_packs_feel_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/fufigavaki/gfbiaop/kazuj.pdfIn PDF document text
    • http://wigigokewadusad.iblogger.org/66915411861.pdfIn PDF document text
    • https://dufelawukada.weebly.com/uploads/1/3/2/6/132682042/mifumanudimefele.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/la_times_crossword_answers_june_29_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/sazokozifipozube.pdfIn PDF document text
    • https://s3.amazonaws.com/falejogajir/cognos_11_report_studio_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/fitted_backless_formal_dresses.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/oh_hae_young_again_ost.pdfIn PDF document text
    • http://dagilupakov.rf.gd/how_to_remove_battery_from_motorola_android_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/abbaigaru_songs_free_naa_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/amtech_prodesign_guide.pdfIn PDF document text
    • http://sajipesexadagon.epizy.com/13203079353.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_off0000d3a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A1 5004 bytes
SHA-256: 504edbbabc25ab029e72b0ac12f4b7cf9379e4e83f1fb65d68fb082b45ffd57f
font_01_sfnt_off0000e4c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C1 11008 bytes
SHA-256: 4078b7158328ff563d6ade85d4d4e69f0f48cee5c772df7aaeb83c7cc69cb8cd

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