Malicious PDF — malware analysis report

Static analysis result for SHA-256 2967de3cc8c91677…

MALICIOUS

PDF

74.2 KB Created: 2021-02-28 06:49:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 5206d7f0785358ea03a2ad8df74f3438 SHA-1: d1956ce0ad76f28eab11e136abe190317faafc5f SHA-256: 2967de3cc8c916777782ff33d59d6f74c8332c3207b22315c44d56fe12007df6
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains or link farms, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing a secondary payload via the embedded URLs. No scripts were extracted, but the PDF structure itself is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://xezojetit.ru/wb?keyword=focusrite%20solo%20vs%202i4 PDF link annotation
    • https://fologonalufofu.weebly.com/uploads/1/3/4/6/134694067/gumipelet.pdfIn PDF document text
    • https://latufuxi.weebly.com/uploads/1/3/1/1/131163666/1548354.pdfIn PDF document text
    • http://predouche.xyz/333379121700ov39.pdfIn PDF document text
    • https://furiraduwonejos.weebly.com/uploads/1/3/4/8/134870793/nigumukumela_mefatafone.pdfIn PDF document text
    • https://logutidukikov.weebly.com/uploads/1/3/1/3/131380383/zevoxevulejefuv.pdfIn PDF document text
    • http://com-copyrighit.com/manual_bearing_press_machineeblph.pdfIn PDF document text
    • http://goromeo.club/totugololetiyixrj.pdfIn PDF document text
    • http://rusherx.studio/448262716612kzaz.pdfIn PDF document text
    • http://xepidenad.scienceontheweb.net/manual_de_organizacin_y_funciones_de_una_empresa_pequea.pdfIn PDF document text
    • http://gepanukotex.getenjoyment.net/2011_rav4_sport_for_sale.pdfIn PDF document text
    • http://nowukusox.mypressonline.com/the_bfg_movie_trailer_2016.pdfIn PDF document text
    • http://laura-egorova.ru/xemunomyvsal.pdfIn PDF document text
    • https://vibusipapomokij.weebly.com/uploads/1/3/2/6/132682711/9837153.pdfIn PDF document text
    • https://reledizov.weebly.com/uploads/1/3/0/7/130775001/5744052.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/jekajebikoterobukafobipa.pdfIn PDF document text
    • http://zitulogakapede.myartsonline.com/2017_ap_stats_frq_answers_5.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/vinexobejomaseferoka.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/baleshwar_yadav_song.pdfIn PDF document text
    • http://pikaderobiw.atwebpages.com/do_you_capitalize_mother_nature.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_off0000e4b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B0 4816 bytes
SHA-256: 08a0564d8d5cf828bf036edb6405478b90dc3564a47c1de374f5c711a292fee8
font_01_sfnt_off0000f538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF538 11564 bytes
SHA-256: e901e32a8c16edd97183089e2aa3e55baa905804b5c01547372e6bdcb9f5c950

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