Malicious PDF — malware analysis report

Static analysis result for SHA-256 462a5432175c0e33…

MALICIOUS

PDF

84.4 KB Created: 2021-02-25 03:25:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2d55bb219caf6af74099e61e7d005089 SHA-1: 38f2a871dfa0ed8c2a3b0de940e81df445717bd0 SHA-256: 462a5432175c0e334251e625720e5e08540f8e3b93fa0a94be21b77e95f84d5e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links are typical of lures designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/award?keyword=hp+laserjet+pro+cp1525nw+printer PDF link annotation
    • http://vubitim.sportsontheweb.net/escuelas_sistemas_y_corrientes_de_la_psicologa_contempornea.pdfIn PDF document text
    • http://dawexefif.getenjoyment.net/ganusox.pdfIn PDF document text
    • http://vowufijetapiko.sportsontheweb.net/what_does_far_sighted_mean.pdfIn PDF document text
    • http://zonizubiro.getenjoyment.net/nexawatakemobepini.pdfIn PDF document text
    • http://topukovatawosu.sportsontheweb.net/how_to_change_my_dometic_thermostat_to_fahrenheit.pdfIn PDF document text
    • http://faxusupovetek.sportsontheweb.net/como_pasar_gramos_a_miligramos.pdfIn PDF document text
    • https://gitasojozatoj.weebly.com/uploads/1/3/0/9/130968906/d9906966f.pdfIn PDF document text
    • http://kakafeg.scienceontheweb.net/singer_4423_heavy_duty_sewing_machine_canadian_tire.pdfIn PDF document text
    • https://mutixuvuv.weebly.com/uploads/1/3/4/6/134665255/7a191e6db6675.pdfIn PDF document text
    • http://xoziduso.mypressonline.com/xodafugiwefajela.pdfIn PDF document text
    • https://bixoriwapavam.weebly.com/uploads/1/3/4/7/134731951/fotalijorawog-xexiwiso-mikogukasive-nizow.pdfIn PDF document text
    • https://bevibobozile.weebly.com/uploads/1/3/4/7/134700853/gelixasiweguze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nuduguzafasu.rf.gd/adjectives_picture_dictionary.pdfIn PDF document text
    • http://mosokiwilag.rf.gd/brick_game_9999_in_1_emulator.pdfIn PDF document text
    • http://zowujobosega.rf.gd/coombe_dean_school_ofsted_report_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/k_y_c_full_form_ki.pdfIn PDF document text
    • http://wutejaxevewef.myartsonline.com/dekaperon.pdfIn PDF document text
    • http://pimurif.rf.gd/fazamod.pdfIn PDF document text
    • http://gisoroxirofusup.epizy.com/100_aos_de_soledad_gabriel_garcia_marquez_resea.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/xibizapapurumapovaw.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_off00010d9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9A 5364 bytes
SHA-256: 1cff5025daa37c9ae21cb55ff82cb762baa33cc188419113ef8306b751ed81a7
font_01_sfnt_off00012006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12006 10684 bytes
SHA-256: bf606cd67ce606e511b6ce54e5893230ed410e5fca3dc8fdf3c410fc5a94e5f1

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