Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e089733217210c5…

MALICIOUS

PDF

71.7 KB Created: 2021-02-08 23:06:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 28f6cf32cd4b387c37d825cbf249a0e8 SHA-1: 1d17c4d28c806f7e7b1d5ba84f20aca9debb8b64 SHA-256: 8e089733217210c5ac12e87b15a481a630e56ebf7b7bbfb33d442447a2b07114
246 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://kepemumud.weebly.com/uploads/1/3/1/4/131454984/xunuke.pdf.
  • 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://leonvi.ru/wb?keyword=cc%20checker%20free PDF link annotation
    • https://cdn.sqhk.co/zumiredosuwi/CKNDXjd/33136491663.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394068/normal_600272001e64b.pdfIn PDF document text
    • https://kepemumud.weebly.com/uploads/1/3/1/4/131454984/xunuke.pdfIn PDF document text
    • https://cdn.sqhk.co/keropolor/eZsSuhj/space_wallpapers_aesthetic.pdfIn PDF document text
    • https://dajidavibaral.weebly.com/uploads/1/3/4/6/134606929/jageram.pdfIn PDF document text
    • https://fepobiwebefu.weebly.com/uploads/1/3/4/5/134592484/sufekav-wujenove.pdfIn PDF document text
    • https://wamukefak.weebly.com/uploads/1/3/5/3/135324497/ripiruso_rovek_kobajoxe_zulakaw.pdfIn PDF document text
    • https://cdn.sqhk.co/wimiwupo/rgjkYii/ombre_nails_easy_tutorial.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494661/normal_5fe171b8855af.pdfIn PDF document text
    • https://cdn.sqhk.co/bibilofefi/XfY6izC/saxafojatisit.pdfIn PDF document text
    • https://susemozud.weebly.com/uploads/1/3/2/8/132814624/3a15d.pdfIn PDF document text
    • https://bozusobogopi.weebly.com/uploads/1/3/2/7/132711975/f6962e80a3e085.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/dojivewobasuval/60917931404.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/69340546033.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/93044554391.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_off0000ddda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDA 4520 bytes
SHA-256: 98ffdd16a719763471b043cbd08a1c38e28980eb0990bf9fe0fac87b6b3518fd
font_01_sfnt_off0000ed31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED31 10920 bytes
SHA-256: bce5b92d098f65d381d485e6ac1bec6ca73b9f0b742176d87b8ebfdb68e4feec

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