Malicious PDF — malware analysis report

Static analysis result for SHA-256 81d8f7f22c92c247…

MALICIOUS

PDF

70.9 KB Created: 2021-03-01 04:48:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 7ec9ac1697976b8e55d1f8f6248876b2 SHA-1: e695fb2e3ea699272a8153952dcd815deefbb4d6 SHA-256: 81d8f7f22c92c247e00bcd055d6798959917b211fad449bf256790b5333eb4d5
186 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
  • 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.
  • 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://baarspo.ru/aws?utm_term=why+is+my+apple+pencil+lagging+on+goodnotes PDF link annotation
    • https://xikaxuroloxo.weebly.com/uploads/1/3/1/4/131406092/8854106.pdfIn PDF document text
    • http://nakanilo.club/90295250786zyvnt.pdfIn PDF document text
    • https://cdn.sqhk.co/waxolulum/fC9y1VD/25258013046.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuwutitaw/hhYjcPZ/wenuvefogolejegotizafu.pdfIn PDF document text
    • https://cdn.sqhk.co/tedigedubemi/qjjieSA/top_up_genshin_murah.pdfIn PDF document text
    • http://stonersfranchise.com/grade_2_math_worksheets_canada_printable0upp5.pdfIn PDF document text
    • http://dovamemowiruz.iblogger.org/21467651980.pdfIn PDF document text
    • https://bodonoweti.weebly.com/uploads/1/3/1/8/131856710/061a77.pdfIn PDF document text
    • http://loruvas.iblogger.org/sports_sponsorship_agreement_template_uk.pdfIn PDF document text
    • http://mugafopame.iblogger.org/ripatiboxiwelejojobagew.pdfIn PDF document text
    • https://cdn.sqhk.co/sejiragidu/4gcOhji/11st_or_11th.pdfIn PDF document text
    • https://cdn.sqhk.co/dedenijikal/hiKjbij/33330858779.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fudotebu.epizy.com/lerunezamodavove.pdfIn PDF document text
    • http://sajipesexadagon.epizy.com/fexobefokopikutifaxigewet.pdfIn PDF document text
    • http://vedixemalirugi.atwebpages.com/49709884402.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_off0000d65f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD65F 5508 bytes
SHA-256: ac973bce71e782af404ab3a6b0be09cc1d84e227057ddddea463240bf4196dc3
font_01_sfnt_off0000e906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE906 11120 bytes
SHA-256: 8ff44bc965355ef6367768b598684535639216772ca065c871d4c7a570b5fbcd