Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeb428d9f2f937da…

MALICIOUS

PDF

73.0 KB Created: 2021-02-27 21:50:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 0fe1c8646497d292b8a4ff765372e42c SHA-1: 6606a34858a50d6800f264ed0fb39f84ab26e07f SHA-256: aeb428d9f2f937da1e3f3fe74cfb1b21df0688d6d4e491aad6bad92439f1fe76
196 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/award?keyword=steps+for+completing+the+square+equation PDF link annotation
    • https://cdn.sqhk.co/gufojakig/jifGEjg/horror_bloody_hands_keyboard_themes.pdfIn PDF document text
    • https://cdn.sqhk.co/lobinazema/chdjhjd/12154562869.pdfIn PDF document text
    • https://femixazate.weebly.com/uploads/1/3/4/3/134363246/fe2ae93.pdfIn PDF document text
    • https://cdn.sqhk.co/tefozakozup/pbjeIhj/11759450577.pdfIn PDF document text
    • https://cdn.sqhk.co/xaranoraf/iCeVidg/final_fantasy_crystal_chronicles_walkthrough.pdfIn PDF document text
    • https://cdn.sqhk.co/delopomixaba/aogjc0o/parosetuvorevunefasiva.pdfIn PDF document text
    • https://cdn.sqhk.co/baxorurifina/N8yjar7/pelakubikenilikojujako.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/Dhajeoi/31141105362.pdfIn PDF document text
    • https://xuzijobozu.weebly.com/uploads/1/3/1/4/131411245/xotekiben.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sikofus.epizy.com/8226965738.pdfIn PDF document text
    • http://zabetexukiked.epizy.com/fefap.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/kojolubura.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/diwugabivevavonidowiv.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/gagavegata.pdfIn PDF document text
    • http://pupitudaxomibi.epizy.com/kuxofozonamuzatefu.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/nomuro.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_off0000dee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE8 5656 bytes
SHA-256: 49fbe83da18a37d7ac9e14547ab932e634ef64ab13b9e7fde8b737075e7b286e
font_01_sfnt_off0000f1f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F7 10820 bytes
SHA-256: 58d47ebcc7243a7a48ecf7beb09c2eec5e8aaf1bbe861a8796de113e98da0190