Malicious PDF — malware analysis report

Static analysis result for SHA-256 6374383b96e58dbe…

MALICIOUS

PDF

65.5 KB Created: 2021-02-25 20:08:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e21b1e036476778297292a616ac3300c SHA-1: ac832477568d709a2e1f02b72b441a311a385af8 SHA-256: 6374383b96e58dbecc78df1b1f598b71c9616510ea6a7669327a9e6190ecef27
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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/wix?keyword=star+worksheet+for+toddlers PDF link annotation
    • https://cdn.sqhk.co/gumorefose/hgyfFi4/pezinufakexamejufixeguz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408713/normal_5fea22f7d9604.pdfIn PDF document text
    • https://cdn.sqhk.co/mawodoso/e2l6gic/portal_del_usuario_sib.pdfIn PDF document text
    • http://managerprogram.live/98316646748oqfkx.pdfIn PDF document text
    • https://cdn.sqhk.co/nafusomo/hfjcYjc/16475530996.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafanez/geaugcs/professional_headshot_photographers_melbourne.pdfIn PDF document text
    • http://zoomita.space/download_facebook_apk_17029byn.pdfIn PDF document text
    • https://cdn.sqhk.co/mejabutumu/WjfSa2s/classic_mobile_phone_ringtone_download.pdfIn PDF document text
    • http://nemosixumeki.mypressonline.com/parabody_350_workout_chart.pdfIn PDF document text
    • http://fullstacket.online/lucky_money_landess_avenue_milpitas_cai7ipv.pdfIn PDF document text
    • http://henrysavbr.site/118492988702wi6d.pdfIn PDF document text
    • http://vugekowuzujed.scienceontheweb.net/37926235143.pdfIn PDF document text
    • http://expressday.online/82334911444irlzc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c5b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5B5 5252 bytes
SHA-256: c87de85c7b2102603f59d1f026a5998aeaf29a1c959532f06f0280b636d9cd7a
font_01_sfnt_off0000d7a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A2 9984 bytes
SHA-256: c9c863f631b1a8bdfbbd76c368a1e2ec81f710206aca7c5ca6f873d1a367e662