Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d734b3bb7b8e3e5…

MALICIOUS

PDF

70.7 KB Created: 2021-02-12 18:37:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: e9497da6a14d7bbb0af9baa88b1c2c49 SHA-1: be0320bb3dc6f72988757786a2a89ba77805ef3c SHA-256: 6d734b3bb7b8e3e5a2421d63be52d3c1ff744ca0dd486549eaafbc3a8b40c192
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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=clash+of+clans+apk+2015 In PDF document text
    • http://twobigs.space/747933315048o092.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387577/normal_5ff691ba1e805.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415530/normal_5fdd6af1eab6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384469/normal_60217898b6587.pdfIn PDF document text
    • http://pagebake.com/mini_international_neuropsychiatric_interview_7.02q2c0.pdfIn PDF document text
    • https://wujawosekeg.weebly.com/uploads/1/3/4/7/134712458/6337350.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449775/normal_600b54667ce47.pdfIn PDF document text
    • http://ohota-ribalka.online/dungeon_fighter_online_wikisyk1l.pdfIn PDF document text
    • http://stroiline74.ru/blender_2._78_macmb0g9.pdfIn PDF document text
    • https://cdn.sqhk.co/bifugudawesu/nhaIib0/jaxamane.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolefowi/dMP2hgH/science_et_vie_junior_feuilleter.pdfIn PDF document text
    • http://netewe5.xyz/root_a505f_u2_android_9_pie543i8.pdfIn PDF document text
    • http://businessoutsourcing.org/628381949459yq2l.pdfIn PDF document text
    • https://cdn.sqhk.co/fafujedajir/fDZibhf/8_bit_music_maker_android_app.pdfIn PDF document text
    • https://wezoduvum.weebly.com/uploads/1/3/4/0/134096245/nefanifazowonoji.pdfIn PDF document text
    • https://xijafidul.weebly.com/uploads/1/3/2/3/132303061/3706985.pdfIn PDF document text
    • https://cdn.sqhk.co/tixunudixa/hjikigb/25157210943.pdfIn PDF document text
    • http://kino-vezde.ru/87039716276x238u.pdfIn PDF document text
    • https://jefaganogebe.weebly.com/uploads/1/3/1/4/131437435/jorozogalizorij.pdfIn PDF document text
    • https://vivazezege.weebly.com/uploads/1/3/4/0/134041722/lijanaze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d8a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A5 5424 bytes
SHA-256: d39ef2457d9d35d5f92aeaae418f4e22f29ae48fb5cefb793b9ddede07f2be17
font_01_sfnt_off0000eb1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1F 10288 bytes
SHA-256: bf60ea718e53b5e9b3e483adbb90644b03f0c10216b9c544c1a321443678e349

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