Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e04f47bc37bf6fa…

MALICIOUS

PDF

81.5 KB Created: 2021-04-15 08:39:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 957804c380159593ee00f2dbda39b887 SHA-1: 34e9326ed53d16d9439bab51d114ffdfadd468c2 SHA-256: 3e04f47bc37bf6faab0bd9dff73792d1bb446d43a8c7d4adcfc6e181ffe3a925
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and are flagged as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The presence of external URIs and the 'link farm' heuristic suggest the document's primary purpose is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://ponafet.ru/strik?utm_term=how+to+fill+out+ielts+answer+sheet PDF link annotation
    • http://alteramaks.world/burnout_paradise_legendary_cars_trophy_guiderjg55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485014/normal_604f4bc5854f6.pdfIn PDF document text
    • https://cdn.sqhk.co/wexunaveb/Egiiehe/boxer_robot_toy_app.pdfIn PDF document text
    • http://wagagawoduzom.iblogger.org/brche_mit_variablen.pdfIn PDF document text
    • https://cdn.sqhk.co/litigoruf/aiiARzM/91919135281.pdfIn PDF document text
    • http://beliyden.xyz/how_much_is_baby_grand_piano_worthxp2eb.pdfIn PDF document text
    • https://cdn.sqhk.co/lomotutuwe/ihijc9Y/fukeridojided.pdfIn PDF document text
    • https://cdn.sqhk.co/sitopizol/VgigdJK/87244581109.pdfIn PDF document text
    • http://1eyvgo.xyz/tejubufuzomakuzuyi.pdfIn PDF document text
    • http://topmassage.net/kedadivadoichp3.pdfIn PDF document text
    • http://chebsvet.ru/brother_mfc-7340_drum_erroruxv93.pdfIn PDF document text
    • http://citrus-fruit.space/xusudidodojisigidusogiki8cxn2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503525/normal_602ff65811f66.pdfIn PDF document text
    • http://drenajkrasnodar.ru/9243566028yzbih.pdfIn PDF document text
    • http://rankingcoach-seo.com/basketball_book_free_download3zjb7.pdfIn PDF document text
    • http://perevod24-card2card.site/59503485667jzz3r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370270/normal_60426fe5b7529.pdfIn PDF document text
    • http://tisimewifexumi.iblogger.org/installing_burp_certificate_android.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377656/normal_5fc6de2f096c9.pdfIn PDF document text
    • https://cdn.sqhk.co/mekurapiw/DCr4jdT/51887554750.pdfIn PDF document text
    • https://cdn.sqhk.co/wegodimumod/hangjYg/95040925116.pdfIn PDF document text
    • https://cdn.sqhk.co/rumobotituda/oycghjd/bi_weekly_payroll_calendar_2017_template.pdfIn PDF document text
    • https://cdn.sqhk.co/pefibovip/HKjfibI/movies_playing_at_cinergy_odessa_texas.pdfIn PDF document text
    • https://cdn.sqhk.co/gizetinediz/4hizjaF/rutanulipokod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417140/normal_600498073829c.pdfIn PDF document text
    • http://icub.tech/the_secret_life_of_plants_stevie_wonder_album0lcq2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vudogomudem.rf.gd/lakemokapejenus.pdfIn PDF document text
    • http://fukukegej.epizy.com/3d_animation_learning_books.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_off00010304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10304 4908 bytes
SHA-256: 6374348b194d87be8932d3860832ba8ca503e725ce7ecba3f7aa91bbbcfc7232
font_01_sfnt_off000113c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113C0 11008 bytes
SHA-256: 0db0c2b0e9ab38dbee3d9cd77376b8623300d89aad679d1db6a13110127ea599