Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7cd9c0d0333df8b…

MALICIOUS

PDF

66.2 KB Created: 2021-02-21 13:55:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 27d9a4b88ac65d8083fe3c9d135d5dc1 SHA-1: 488f9ec1e82a1cb8dd5f72bd0c9d098c3ee83196 SHA-256: c7cd9c0d0333df8bfcb67be52d0532ab55257defc0bd64e5019fdf2f7b286cda
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=twilight+new+moon+graphic+novel+volume+1+pdf In PDF document text
    • https://cdn.sqhk.co/nububufi/fUHj0ig/2624101173.pdfIn PDF document text
    • http://padlamadla.site/gsheet_query_date22gl8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380213/normal_5fef359f2b1cf.pdfIn PDF document text
    • https://dugaposiga.weebly.com/uploads/1/3/4/8/134857723/74b35e91a57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489976/normal_602c8063be453.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492555/normal_6026747f9bab6.pdfIn PDF document text
    • https://sotivozorome.weebly.com/uploads/1/3/4/7/134733800/matutipirukimom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375716/normal_5ff21c9d2b9c7.pdfIn PDF document text
    • https://dodizavezoku.weebly.com/uploads/1/3/1/3/131398251/zojene.pdfIn PDF document text
    • https://jikurufor.weebly.com/uploads/1/3/4/6/134613562/f7133e4c6c8fd.pdfIn PDF document text
    • https://cdn.sqhk.co/visobipibe/hfBRcfb/neurologist_morristown_nj.pdfIn PDF document text
    • https://kozegefiseram.weebly.com/uploads/1/3/1/3/131379202/9b25d617cd7fa.pdfIn PDF document text
    • https://cdn.sqhk.co/zopinulepa/abZhj63/deditalolidirapi.pdfIn PDF document text
    • http://d-youtube.com/197008450552x4h8.pdfIn PDF document text
    • http://tendernes.ru/siwepuvariguzokoi5go4.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/8hdHSjh/zombie_sniper_shooting_3d_apk.pdfIn PDF document text
    • https://limejanokevipa.weebly.com/uploads/1/3/0/7/130739330/c4adb68be051c1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lisirowi.rf.gd/zuwijapevubof.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_off0000c5ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5EF 5544 bytes
SHA-256: 23ea661f07e8cae729c2c5e97f52c42f083220bad4d54f8b6af01a17d066463f
font_01_sfnt_off0000d8be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BE 10132 bytes
SHA-256: 7c87ca5c1c3f318e6b9e30660cfa046dc1b48e97908b419a4ae7cd6870ccfe13

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