Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ffe0ab6769515a9…

MALICIOUS

PDF

62.3 KB Created: 2021-02-12 19:44:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 4ef36c112c29d2ea70d5d5f169452e16 SHA-1: 21b7767cb8b13e9401db13339dd0007f9dadd80a SHA-256: 8ffe0ab6769515a996fff7c62712c3473e1616a0ec5778265d20866fa42c9cc4
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=chicago+manual+of+style+ebook+download In PDF document text
    • https://buwolerujagelav.weebly.com/uploads/1/3/4/5/134580081/kuxuripapazugisida.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498868/normal_6014baf8a7792.pdfIn PDF document text
    • https://cdn.sqhk.co/mufipofunup/hgojiig/5550912279.pdfIn PDF document text
    • https://mejodedasebedo.weebly.com/uploads/1/3/4/7/134725949/6680515.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448743/normal_5fcd3e7115b02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465388/normal_601de5fcd3d2f.pdfIn PDF document text
    • https://cdn.sqhk.co/tovipovo/d5SjcFl/55342266703.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443371/normal_600c7b6db4b1f.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/bHggpgy/lafajezasuxufam.pdfIn PDF document text
    • https://befewegumezozem.weebly.com/uploads/1/3/1/4/131453636/4e57dce22d.pdfIn PDF document text
    • https://lolimoxozidexus.weebly.com/uploads/1/3/2/6/132682882/rekimitu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389606/normal_5fc6aefd3e5b5.pdfIn PDF document text
    • https://cdn.sqhk.co/runolisor/h25NjjF/vector_gun_real_name.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tinodaxaxaduj.rf.gd/godij.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/slope_math_worksheets.pdfIn PDF document text
    • http://firotiz.epizy.com/4722813866.pdfIn PDF document text
    • http://xogeguf.rf.gd/nalorupipokugagomugebibez.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/evaluation_sheet_ks2_dt.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_off0000b706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB706 5644 bytes
SHA-256: 5fc56135f34d09af1a5576db6b7215a5eebe81c468984ef0f9094d3651ef1b6a
font_01_sfnt_off0000ca34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA34 9928 bytes
SHA-256: cd70fc29c5ef012493211f8c4b3e0fc2e0441ce4d465590f63b6baf4191ec20d

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