Malicious PDF — malware analysis report

Static analysis result for SHA-256 c53a961bd12106e7…

MALICIOUS

PDF

71.7 KB Created: 2021-02-16 22:52:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6d73c9c0d4cb9e248d1f6f2cf5e44743 SHA-1: 9a91cef596fddef5ec62842ba9050ba4854fbd08 SHA-256: c53a961bd12106e77148f2e530b1e22058267f80dce1f1800033c6a4fbc35b33
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://maypoin.ru/wix?keyword=bitcoin+beginner+guide+pdf+2017 PDF link annotation
    • https://xovobinawulum.weebly.com/uploads/1/3/4/8/134883327/nenijewafoxega.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422877/normal_60192cd667f17.pdfIn PDF document text
    • https://kexinebig.weebly.com/uploads/1/3/4/3/134338338/vepusokuv-sifipaxuva.pdfIn PDF document text
    • https://zexejofamimow.weebly.com/uploads/1/3/1/4/131438337/b8d924482ef46.pdfIn PDF document text
    • http://file-id.ru/amona_tete_mabo_free3kod0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375708/normal_5feb40d7ee1f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447276/normal_5ffec2fb33604.pdfIn PDF document text
    • https://webunufilijamo.weebly.com/uploads/1/3/4/6/134677486/patuxupodife.pdfIn PDF document text
    • https://cdn.sqhk.co/waximanodif/Sru7xzI/kakozumivukijodi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373259/normal_600dd03544dfe.pdfIn PDF document text
    • https://refiraledekire.weebly.com/uploads/1/3/4/7/134715744/zifub.pdfIn PDF document text
    • http://hrushch.space/mac_os_10.7.0_dmg_download69ju8.pdfIn PDF document text
    • https://jasefukop.weebly.com/uploads/1/3/0/7/130776564/ee444c38d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384835/normal_600ea0a6c7741.pdfIn PDF document text
    • https://rixeludabigadak.weebly.com/uploads/1/3/0/9/130969597/6959234.pdfIn PDF document text
    • http://nutunajika.66ghz.com/buick_century_1998_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://muvelexadaw.epizy.com/astrology_books_in_kannada.pdfIn PDF document text
    • http://posugez.epizy.com/bijolulemodezupab.pdfIn PDF document text
    • http://fukijudetoj.epizy.com/louisville_cardinals_injury_report.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_off0000db8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB8E 5496 bytes
SHA-256: 968fd09aff67cefb0d1bfa231895bf20f446bfba3f0d5c2beeaf8d7c854d746a
font_01_sfnt_off0000ee65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE65 10284 bytes
SHA-256: cfc13eca4af161ae4344d5059d7207935eb29b5fc79d09337195b3e8e74e387e

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