Malicious PDF — malware analysis report

Static analysis result for SHA-256 77359390445dc081…

MALICIOUS

PDF

66.8 KB Created: 2021-02-17 01:28:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1579d96f7e8a6a78cb4892fc9d4810c2 SHA-1: d78b1b374381fb534ba21fabc6e0fbb3849cdd66 SHA-256: 77359390445dc0819a1c96f195344526c1104fd34ec6e560390c682454c288d8
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=catcher+in+the+rye+chapter+13+quizlet In PDF document text
    • http://muvirire.22web.org/adobe_scanner_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527164/normal_602588150d4b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366628/normal_602c4b61bd805.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412377/normal_60204466231f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496592/normal_601111c911a78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483587/normal_60256bdf4d355.pdfIn PDF document text
    • https://cdn.sqhk.co/tutabalero/Jriijil/jupenufubovu.pdfIn PDF document text
    • http://jijufik.22web.org/lamabudis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380073/normal_601d29d7ad711.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445325/normal_5fd98902bfd0e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498366/normal_6001ca8081891.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wurunuj.epizy.com/live_nettv_v_4._6_apk.pdfIn PDF document text
    • http://muzowonuneferew.rf.gd/aportaciones_del_modelo_atomico_de_erwin_schrodinger.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/febazovop.pdfIn PDF document text
    • http://veridipu.rf.gd/71240281962.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/product_brochure_design_template.pdfIn PDF document text
    • http://kolofagigetu.epizy.com/thai_heart_failure_guideline_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/50750917397.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_off0000cb8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB8C 5244 bytes
SHA-256: fc4cb82f7a4bc576877cd171e41ee60fb5df906ef8363bc82a40efd45b3f4df6
font_01_sfnt_off0000dd76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD76 9508 bytes
SHA-256: 759b572a54f1521f28c2d910ed0d7aaf8ab3c475d00e3d3061473e0dbefa44c8