Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf959ff36b20b188…

MALICIOUS

PDF

81.1 KB Created: 2021-02-27 05:29:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 776784c4c0a494947b9a2bf6bfff2272 SHA-1: 052290063c532f926c9a0589482fb64b8b2ad8e1 SHA-256: cf959ff36b20b1882c1fd83f6dd236b754e10c3a086c4708b0959528708b413a
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xajibur.ru/strik?utm_term=mask+of+the+red+death PDF link annotation
    • http://kozojorakipen.iblogger.org/guxarigemuwogugevo.pdfIn PDF document text
    • http://faceskinagainbeauty.xyz/jijubugomadupekoxigaz3lwd.pdfIn PDF document text
    • http://lazadacostumercenter.com/amman_stock_exchange_annual_reportisqp3.pdfIn PDF document text
    • http://smcjd.com/968477834126kn6i.pdfIn PDF document text
    • http://tipofeliluget.medianewsonline.com/jolofovonubekukoz.pdfIn PDF document text
    • http://sixesijilolun.mywebcommunity.org/duximifizep.pdfIn PDF document text
    • http://bofinaposo.iblogger.org/add_and_subtract_fractions_worksheets.pdfIn PDF document text
    • http://cupe1.ru/917610613490vm8i.pdfIn PDF document text
    • http://sberpodarok2020.online/65336904905lut1r.pdfIn PDF document text
    • http://kirakexig.mypressonline.com/lenub.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/jojitagifuva/darivak.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/respiratory_system_anatomy_and_physiology_notes.pdfIn PDF document text
    • http://gosaduzunake.myartsonline.com/55762494067.pdfIn PDF document text
    • https://s3.amazonaws.com/wujanozo/google_translate_app_for_desktop.pdfIn PDF document text
    • http://lojabupabavize.onlinewebshop.net/jinekigovibeg.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/69115608092.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_off00010026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10026 5032 bytes
SHA-256: e9925ed8549163da0074874b685749e868a6a332d1e55502c97f15d6ea1ce912
font_01_sfnt_off0001114d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1114D 11628 bytes
SHA-256: 620b18ab1b58f04469c21dc9b3a8a5fbbc310db7fa30d1eb17ba566f744f6e1f

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