Malicious PDF — malware analysis report

Static analysis result for SHA-256 66875f68f2cc7549…

MALICIOUS

PDF

68.5 KB Created: 2021-02-23 14:14:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: edd0393a5091dd9f1b8578b6a691f852 SHA-1: 634e88ffd2f9428355fa7bf0257856ecce53b4f6 SHA-256: 66875f68f2cc7549a84b8e40a3c28ec5cfdb60f927f56d8493a13ef58c9b5a34
184 Risk Score

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=new+primewire+link In PDF document text
    • http://top-salez.site/split_cal_king_flannel_sheetsk0pgx.pdfIn PDF document text
    • http://poradoit2.site/when_i_play_a_video_the_screen_is_blackqjlih.pdfIn PDF document text
    • http://momentshop.space/english_songs_lyrics_downloadr6lni.pdfIn PDF document text
    • http://sfhgfje5df.xyz/123507489688ta7s.pdfIn PDF document text
    • https://regurawuxafedan.weebly.com/uploads/1/3/0/7/130740517/rixox.pdfIn PDF document text
    • http://kyponnik.online/61912717656gki58.pdfIn PDF document text
    • https://mudulavodeg.weebly.com/uploads/1/3/1/0/131070753/xajatokug_mezoj.pdfIn PDF document text
    • http://wow50.pro/instagram_version_apk4fun3tlvg.pdfIn PDF document text
    • https://rarerosedipise.weebly.com/uploads/1/3/4/8/134876587/4c5a6ba5f7f.pdfIn PDF document text
    • https://tezefidusipenu.weebly.com/uploads/1/3/1/8/131857758/fupunurovofawam.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/nuxulikiwab/17140956546.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/tevifuvo.pdfIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/facebook_video_direct_link.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_off0000d295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD295 4704 bytes
SHA-256: f76b5dbf6edb80fba9e6d1626b96f598cbb1836d830d00be3c8f05ca58897aaf
font_01_sfnt_off0000e294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE294 10272 bytes
SHA-256: 48de22785ee7824d97fe9085fabfaf3b762e31451c8983c8ad37eaf374f98ffe