Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d5e319c5f74f8a4…

MALICIOUS

PDF

68.1 KB Created: 2021-02-21 04:05:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 7166e902e67f93b89a3415c9e38cd242 SHA-1: 6caf9c9347229cf14a5204ee545e785b4713af14 SHA-256: 4d5e319c5f74f8a465b17566b426ff11c51259e2a7284714cb4c973fab551ad2
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=feudalism+2+funny+games In PDF document text
    • https://vovowiki.weebly.com/uploads/1/3/2/3/132303124/salum-kigabikutukaka-sipelupif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423155/normal_5ffe47a8aa522.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444874/normal_601751b7330be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419441/normal_60230206dad72.pdfIn PDF document text
    • https://mumetimobenuja.weebly.com/uploads/1/3/2/3/132302956/mulakibukasabeja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500883/normal_60113acde487e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378836/normal_5fe06dd90d136.pdfIn PDF document text
    • https://kazuvamelu.weebly.com/uploads/1/3/0/7/130738637/pagifetadager.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369162/normal_602f6dc38bb6f.pdfIn PDF document text
    • https://rofoxanubojinud.weebly.com/uploads/1/3/2/7/132740779/8813791.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408584/normal_5fd39b7ba7134.pdfIn PDF document text
    • https://dowanudamedi.weebly.com/uploads/1/3/1/3/131398164/1190752.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/befafuni/31397652488.pdfIn PDF document text
    • http://nipalarinab.epizy.com/64628759970.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/bleach_brave_souls_hack.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/android_10_nokia_x7.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_off0000cade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCADE 5320 bytes
SHA-256: ee876b08f9b35750afe42187031d07e4f38c8344b9d885a8d89c03cd5f666da5
font_01_sfnt_off0000dcfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFC 12492 bytes
SHA-256: ff67f40b6ecd24a19643155b1b2e8e846c1ec5be71686b61e8424b8ba6eabc84

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