Malicious PDF — malware analysis report

Static analysis result for SHA-256 611b51ead85b769d…

MALICIOUS

PDF

72.7 KB Created: 2021-03-02 03:02:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 5af133d7e21bd643c5c5a30f6c062b0b SHA-1: 91191e1641a9a3c97808223464650edea98ab451 SHA-256: 611b51ead85b769d9a3d829f98f3d2e0b6cb2566fcaac02061aee0595bfb7f78
176 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://baarspo.ru/award?keyword=what+is+chase+bank+address+for+wire+transfer PDF link annotation
    • https://cdn.sqhk.co/logulemuset/uMCgigf/legacy_2_the_ancient_curse_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/zasokolof/xbjgvte/xigizi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393644/normal_5fc99b00a9ee6.pdfIn PDF document text
    • https://cdn.sqhk.co/wenejusuzixe/gtihghc/lorebob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487916/normal_6000a8619fe5e.pdfIn PDF document text
    • http://megatorg.ru/28114788318touc6.pdfIn PDF document text
    • http://filajupixi.iblogger.org/how_to_charge_a_smart_wristband.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nutujetis.rf.gd/abacus_maths_tricks.pdfIn PDF document text
    • http://xepolowiw.epizy.com/598934770.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/excel_vba_get_last_used_column_number.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_off0000df73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF73 5388 bytes
SHA-256: f3cb354145a93164ef63ab54311ef1d12d86a2c6aba41056701f7d0213de9d00
font_01_sfnt_off0000f1d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D3 10704 bytes
SHA-256: 14f7415983985e8d1f76308acb356ba8c1816e2d9997b160dcfa5b55e44a2c67