Malicious PDF — malware analysis report

Static analysis result for SHA-256 5884051e0541bf78…

MALICIOUS

PDF

73.3 KB Created: 2021-02-16 16:58:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 505413ba882fc938eefed720a93b5019 SHA-1: 4f513154715bf59c28381c19a4e46bb3a18f665a SHA-256: 5884051e0541bf78b0c04cc5bc3661ccf36f1ddcf67731b6ebd8800cea1d9f67
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least one pointing to a known malicious redirector. The ML classifier and ClamAV also flagged this file as malicious, indicating a phishing or trojanized document. The presence of embedded URLs and the link farm structure suggest an attempt to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=dungeons+and+dragons+fifth+edition+prestige+class In PDF document text
    • https://cdn.sqhk.co/tumosirewuw/gdSc8hh/twilight_struggle_board_game_how_to_play.pdfIn PDF document text
    • https://cdn.sqhk.co/noxibogalu/jeg5yhg/aliexpress_human_hair_reviews.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489240/normal_5fe86085d1068.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405641/normal_601b982d60c3a.pdfIn PDF document text
    • https://fokomawirofuteb.weebly.com/uploads/1/3/0/9/130969657/wabonudozikexalup.pdfIn PDF document text
    • https://nafugawiwira.weebly.com/uploads/1/3/1/4/131438392/1b8e0bcce5.pdfIn PDF document text
    • https://fanuxerejupu.weebly.com/uploads/1/3/1/3/131398214/3613302.pdfIn PDF document text
    • https://cdn.sqhk.co/golemejexeno/Ahigi35/original_bubble_shooter_game_free_download.pdfIn PDF document text
    • https://lamipakowoj.weebly.com/uploads/1/3/2/8/132814468/tutinolan_nibofonaru_badevexufisuz.pdfIn PDF document text
    • https://cdn.sqhk.co/wetewajaba/Yidgdhf/jixefo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500446/normal_5fee2bf00eacd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425255/normal_5fe90bc7617b7.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/lulelepese/inbound_certification_hubspot_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/g._f_b._f_love_images.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/wordscapes_level_1440_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/nba_games_2019_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/jivala/antalyaspor_fc_form.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/48566134894.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/set_onclick_button_android_studio.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/52697001614.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/32175973163.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/linear_equations_and_inequalities_word_problems_worksheet.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_off0000e006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE006 5416 bytes
SHA-256: 1c5f560253602f2cc4bb02e63b764e5cf2409fd6d9f207601d37be99e8bf5989
font_01_sfnt_off0000f27a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27A 10836 bytes
SHA-256: 3d312635ad75c4f28d2412e91810f02e8a32a2baa82489f46b8fa54a4282485b

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