Malicious PDF — malware analysis report

Static analysis result for SHA-256 6778b3fade1c93c3…

MALICIOUS

PDF

68.7 KB Created: 2021-02-12 06:39:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ab870d37de264e9c3247bab77f8b06eb SHA-1: a7a397312306f059af6f6cf95ba40f0c68632848 SHA-256: 6778b3fade1c93c30d3f0755814ba30535249b7e52e12112bcc37b07809e4c26
186 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
  • 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://seumenha.ru/wix?keyword=activity+3.9+statistics+and+quality+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370560/normal_5ff76bbbe6668.pdfIn PDF document text
    • https://cdn.sqhk.co/nugopanage/shfibhb/gewosofaraxu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370744/normal_5ff53c947f3b5.pdfIn PDF document text
    • https://kilazazemuvazu.weebly.com/uploads/1/3/1/4/131452741/posezifa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447437/normal_5fca395709693.pdfIn PDF document text
    • https://cdn.sqhk.co/xokunafuse/6jeBijY/marketing_coordinator_jobs_in_atlanta.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/gdidhaq/lep_s_world_3_game_download_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365583/normal_601611aae00ad.pdfIn PDF document text
    • https://cdn.sqhk.co/molavagew/gNC8jae/stick_war_2_unblocked_full_screen.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409992/normal_5fcbe5825a2ef.pdfIn PDF document text
    • https://vobulesije.weebly.com/uploads/1/3/1/8/131857334/7664854.pdfIn PDF document text
    • https://kudarori.weebly.com/uploads/1/3/5/9/135960502/tivap-gipile.pdfIn PDF document text
    • https://cdn.sqhk.co/jemitaso/eVkijhj/90436265680.pdfIn PDF document text
    • https://gugajapu.weebly.com/uploads/1/3/5/3/135330564/476bc59259.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486033/normal_601a51e3cee2f.pdfIn PDF document text
    • https://biwewijusegi.weebly.com/uploads/1/3/4/5/134586848/ffa762b8cbf7e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475741/normal_6004dae747ab5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409811/normal_601a7661e91f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466376/normal_5fda4fc78860f.pdfIn PDF document text
    • https://cdn.sqhk.co/pibexezases/jiQsAU7/dirty_leaf_blower.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_off0000d006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD006 5652 bytes
SHA-256: a2a51d7ad331e33cc5a5427f751e57585cb63f5345225236fb9c574d775598f7
font_01_sfnt_off0000e36e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36E 10004 bytes
SHA-256: 0502dc2e459a7bbf03b54d5662fe0dd071f5d7c42ba404314ebeb06a23fdb090

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