Malicious PDF — malware analysis report

Static analysis result for SHA-256 d53fc9a6570cbc06…

MALICIOUS

PDF

72.3 KB Created: 2021-02-23 07:50:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: eb9d29b934aa21165afe3ce9d561419c SHA-1: 3674507dcc60b6cf8024920c532e4e2fdc9fadbb SHA-256: d53fc9a6570cbc0650d5dc2af5201f0ce8419b762dc40038c1ca5cb6ae522d3d
156 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 a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://bologen.ru/123?utm_term=love+story+lyrics+andy+williams PDF link annotation
    • https://dukuvelawabuze.weebly.com/uploads/1/3/0/9/130969723/niwani.pdfIn PDF document text
    • http://glawerry.online/fufigunidorufilupobalolt9duu.pdfIn PDF document text
    • http://life50it.pro/bayliner_175_extended_swim_platform6ud99.pdfIn PDF document text
    • https://rikelakejif.weebly.com/uploads/1/3/4/8/134885243/datexuwusixezoxopir.pdfIn PDF document text
    • https://logizovaxe.weebly.com/uploads/1/3/4/5/134506690/4880715.pdfIn PDF document text
    • http://bas-vorota.ru/battletech_a_game_of_armored_combat_rulesspmju.pdfIn PDF document text
    • http://trickyturkey.com/73212939980zfsf4.pdfIn PDF document text
    • https://kitogabizog.weebly.com/uploads/1/3/6/0/136053612/xitakawimapalis-wisapunagiget-gexikotepar.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/vovuzize/star_wars_visual_dictionary_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/99083062833.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/accounting_wallpaper_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/bugatti_logo_wallpaper.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/47656469628.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/destiny_s_child_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/bufovasa.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/national_anthem_of_ussr_sheet_music.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_off0000dd71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD71 5280 bytes
SHA-256: 2bc680be518e5a7d1440d1a7a062f65526ceb955eb85c691b8972660bb786bc0
font_01_sfnt_off0000ef70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF70 10872 bytes
SHA-256: c72177234e285faaa4eab028000a21edad96e21d1c6b7a24c6624bf598348c07

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