Malicious PDF — malware analysis report

Static analysis result for SHA-256 792d81672da0e9be…

MALICIOUS

PDF

69.7 KB Created: 2021-02-23 08:47:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 77f9951c3438d2e10f0c68193dd16842 SHA-1: ace60c4520391da0aff3187312e5af480f673101 SHA-256: 792d81672da0e9be2c2107f1936c4bbfb9c80b9b4c30ae8d616c86c732be1754
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://yafferge.ru/wix?keyword=garth+brooks+as+chris+gaines+album In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367287/normal_600b4c8ddfeec.pdfIn PDF document text
    • http://walapapu.iblogger.org/37128785134.pdfIn PDF document text
    • http://kewisanoxiv.66ghz.com/tizeri.pdfIn PDF document text
    • https://cdn.sqhk.co/joduragenep/nibyKhg/disneyland_park_paris_map.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494147/normal_5fe254c06003a.pdfIn PDF document text
    • https://cdn.sqhk.co/gezefesete/zggD1hf/pibebuxeloxu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481058/normal_5feb9f943f261.pdfIn PDF document text
    • https://cdn.sqhk.co/jigugabopu/jf9vhfT/literisupigawaxema.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414514/normal_5fdd8fbeb1964.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384036/normal_5fdf723a1d4dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491687/normal_5fd9accde233b.pdfIn PDF document text
    • https://cdn.sqhk.co/musutalivun/3ichbG1/cute_black_boy_hairstyles_braids.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485322/normal_6021cc21ce63c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367275/normal_600d1ba8e4842.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lozefedewi.rf.gd/kendo_grid_row_template_inline_edit.pdfIn PDF document text
    • http://jezowadu.epizy.com/video_ambyar_didi_kempot.pdfIn PDF document text
    • http://gexazavere.epizy.com/comprehension_grade_7_worksheet.pdfIn PDF document text
    • http://pawuvunof.epizy.com/62994644807.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_off0000d406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD406 5448 bytes
SHA-256: e6e58e1e55fe08ed51c4914787757d7f5277a485bac08816b11642611cfa1f58
font_01_sfnt_off0000e66a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE66A 10312 bytes
SHA-256: 4d7a9687483f9b0e32331283267bb52457ce7ee75dc306a90ae42813a5957db3

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