Malicious PDF — malware analysis report

Static analysis result for SHA-256 00bff5744752a0bf…

MALICIOUS

PDF

65.4 KB Created: 2020-11-17 03:42:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8188660c706abc30bcffb76c88d5ca6c SHA-1: d5079e3f86bf7618b10da099e08653ea8f36fef9 SHA-256: 00bff5744752a0bf20c0bccd80579de9b26a32a2fdd5f7dcd5d33aebf5ca3a47
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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://traffine.ru/strik?utm_term=adobe+non+genuine+software+popup PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375522/normal_5fa3d6aacbb12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445729/normal_5f9fbc16742fe.pdfIn PDF document text
    • https://xovatikawe.weebly.com/uploads/1/3/4/7/134726086/wafaribikova-xubotikomabana-zitanaxedaga-wukagogajuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376359/normal_5f93c04a31a1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452386/normal_5faf84cd105be.pdfIn PDF document text
    • https://repafajekojila.weebly.com/uploads/1/3/4/3/134305679/9983319.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374696/normal_5fa0a712a00b5.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/jupevuxirapi/anaesthesia_made_easy_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/zexorobadapimeluji.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/cuerpo_sano_mente_sana_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/paises_capitales_y_banderas_del_mundo.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/juzapudetepix.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/42742450660.pdfIn PDF document text
    • https://s3.amazonaws.com/lesepapusojifax/bebuluzisilikamujomam.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/zufalosorukop.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_off0000c3c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3C7 5396 bytes
SHA-256: db7739faaa9c4c2ac6fd340043bfb197d83554178f80bd6ee8be85af2ef6c157
font_01_sfnt_off0000d646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD646 10176 bytes
SHA-256: 46d412362cd3ab298ec713c9a1abb2b9096f03673c258b2928ef6de86ddf01e3

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