Malicious PDF — malware analysis report

Static analysis result for SHA-256 478aeaaf9175e539…

MALICIOUS

PDF

74.0 KB Created: 2021-02-07 05:41:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5bc05fc632690d7c6db4be5c981f4cd5 SHA-1: bf31d79ad77c08e454d99b6f14b806de05320dc9 SHA-256: 478aeaaf9175e53959ad671edc31d543f82253e4eb5af98bd84bbffff5122cfc
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains references to search terms and the wkhtmltopdf tool, suggesting it's designed to appear as a search result. The numerous embedded URLs, including one pointing to maypoin.ru, indicate a phishing or redirection scheme to deliver further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://maypoin.ru/wb?keyword=consequences%20of%20apartheid%20in%20south%20africa%20pdf PDF link annotation
    • https://cdn.sqhk.co/fumamimed/KTijih3/39103904865.pdfIn PDF document text
    • http://grizhoff.ru/54116405848fbpbb.pdfIn PDF document text
    • http://livethailand.fun/sales_dashboard_ppt_templatet8mtr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366015/normal_5ff2278bba912.pdfIn PDF document text
    • https://dafizigupiteg.weebly.com/uploads/1/3/4/4/134492389/2480054.pdfIn PDF document text
    • http://itsamorem.com/29541046347wa44t.pdfIn PDF document text
    • http://ingmijn.com/college_geometry_problems_and_answers18657.pdfIn PDF document text
    • https://gegoviboz.weebly.com/uploads/1/3/4/8/134876631/8d78b673.pdfIn PDF document text
    • http://bbbbbbbbeeee.space/caucasia_bookyc87r.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404740/normal_5fecae6e42940.pdfIn PDF document text
    • http://alkim.xyz/efootball_pes_2021_lite_release_datesb5a8.pdfIn PDF document text
    • http://mklhhhh.space/esposa_de_genaro_garcia_lua_linda_crv663p.pdfIn PDF document text
    • https://zisifogadudup.weebly.com/uploads/1/3/4/7/134765868/36983dc8b.pdfIn PDF document text
    • https://cdn.sqhk.co/gulanuwe/chjePii/stack_cannon_3d_printing.pdfIn PDF document text
    • https://cdn.sqhk.co/purovufizu/hIijgfb/rocket_man_elton_john_piano_sheet_music.pdfIn PDF document text
    • https://bojufare.weebly.com/uploads/1/3/1/0/131070992/baweniti_futulavegi_xabesowuba.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/nutanigonu/fetukiva.pdfIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/difeferewuwabiz.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_off0000e625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE625 5244 bytes
SHA-256: 04ed9cd9ad038693540b43bf9dd379e6cae7174874bcc963c34ac27d981c7708
font_01_sfnt_off0000f7f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F6 10388 bytes
SHA-256: ba48b8d5eb3eb269c6dd33e1d7fe563aecef4accf94e98d8636a681e9e58e5d2

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