Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c3f8ebde027ea57…

MALICIOUS

PDF

79.1 KB Created: 2021-01-31 13:53:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: cbe2460de0a97f0892783464e1009bc9 SHA-1: debf4d2c3e04960d17d50bdf42aea2f32458d652 SHA-256: 9c3f8ebde027ea57b0070f321d967278234d1ab540ccb9fe3dc9b535a237df2e
196 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.
  • 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/aws?utm_term=new+chhattisgarhi+movie+free PDF link annotation
    • https://torosiwetub.weebly.com/uploads/1/3/5/3/135351177/5d683005.pdfIn PDF document text
    • https://tivositazevuzin.weebly.com/uploads/1/3/5/3/135349871/gaborotewa.pdfIn PDF document text
    • https://zasefupaboz.weebly.com/uploads/1/3/2/3/132302972/jenaju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459777/normal_60161bc1a10d3.pdfIn PDF document text
    • https://panebelodoz.weebly.com/uploads/1/3/4/6/134619461/91d87.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454167/normal_5fd069be6a161.pdfIn PDF document text
    • https://kabudinikibe.weebly.com/uploads/1/3/4/7/134716255/541ad61a2934de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485322/normal_5fdbcdbddeadd.pdfIn PDF document text
    • https://cdn.sqhk.co/putepirapad/ghiPieq/horizon_transport_mobile_app.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/vobuturinivi/xutojaputikaropafavimo.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/sinonimo_di_prendere_forma.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/dedication_template_dissertation.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/39690658640.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/zupoziwunalepaneranuzumoj.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/netlux_antivirus_2019.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_off0000f8d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D6 5384 bytes
SHA-256: 85142c52eae846f11f249bc5fbfc327e99d47ae1f87fa5b41957955f4dcd5182
font_01_sfnt_off00010b1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B1C 10948 bytes
SHA-256: 6fe312e66e6f6db7be5845669a682b628e57476f7fd575c520c7957138bf3f17