Malicious PDF — malware analysis report

Static analysis result for SHA-256 4263e4125de38820…

MALICIOUS

PDF

83.5 KB Created: 2021-03-29 15:31:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 2ce02b6e972f9b33ce30b8357f7cfd19 SHA-1: c2ec9fe8ae116da4010f4f4268937c4c6a0514aa SHA-256: 4263e4125de38820b27903436a844930267f305e5e83ef4ba39ec483066cc9b0
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicate a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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://golowaki.ru/wix?keyword=move+mouse+download+for+windows+10 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4484639/normal_5fd1ac26cee90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368953/normal_603306b8b96b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481839/normal_6048d13cd4449.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489595/normal_600f5f8937d6c.pdfIn PDF document text
    • http://morujonimavop.22web.org/85669474262.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492573/normal_603e4b0810a21.pdfIn PDF document text
    • http://bilabugova.iblogger.org/pathfinder_kingmaker_best_class_for_first_playthrough.pdfIn PDF document text
    • http://kuxufijum.iblogger.org/posojuxodunutixupedugowa.pdfIn PDF document text
    • http://geforiro.scienceontheweb.net/sinosevat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453900/normal_605f2cf0de740.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365606/normal_5fc7ee60b5d90.pdfIn PDF document text
    • http://gedagefi.22web.org/95658117999.pdfIn PDF document text
    • http://boputev.66ghz.com/work_permit_application_form_south_africa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://roraxekabitapoz.rf.gd/34448241351.pdfIn PDF document text
    • http://gebopotaxe.rf.gd/wanefog.pdfIn PDF document text
    • http://buzanuziti.myartsonline.com/sinuxesuje.pdfIn PDF document text
    • http://mikijanux.atwebpages.com/kerala_hindu_baby_names.pdfIn PDF document text
    • http://xobibaga.myartsonline.com/common_sig_codes.pdfIn PDF document text
    • http://buvekixuj.epizy.com/network_behavior_analysis.pdfIn PDF document text
    • http://galopaxuvubopuj.rf.gd/written_communication_skills_interview_questions_and_answers.pdfIn PDF document text
    • http://fikexole.rf.gd/cbt_adolescent_depression_worksheet.pdfIn PDF document text
    • http://vesuduw.epizy.com/bsc_1st_year_books_download.pdfIn PDF document text
    • http://pimubejat.epizy.com/animated_movies_dual_audio_300mb.pdfIn PDF document text
    • http://lavovexerok.epizy.com/when_man_is_not_interested_in_you.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB8 5204 bytes
SHA-256: ab8b6b41a9ef9618f217088001430b825a0e2cf0cb47b2978b7960f8dd394809
font_01_sfnt_off00010f69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F69 10208 bytes
SHA-256: 25f33c84379d03112e51106035fe88004fb1143a9a439be23ec06841cc5b9f5f
font_02_sfnt_off00013260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13260 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34