Malicious PDF — malware analysis report

Static analysis result for SHA-256 126cb2e47d3f6441…

MALICIOUS

PDF

70.6 KB Created: 2021-02-14 04:43:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 28e508c47c00c66dc66e3608a036b4a5 SHA-1: 50d770300444f07c6ee0a08df3d943d815cb0ee2 SHA-256: 126cb2e47d3f64410cddac73fecbcaee48e2de097c687a79baa9ecc989b16cda
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=shadow+demons+sarra+cannon+free+pdf PDF link annotation
    • https://cdn.sqhk.co/xowuzaseku/IZb2hhi/69591832009.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530429/normal_6026fe2642752.pdfIn PDF document text
    • https://jodejivosarixu.weebly.com/uploads/1/3/4/3/134314211/22c856.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489852/normal_6018fc7972546.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366654/normal_6003a59261e9f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450351/normal_5fcfad81ef308.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366655/normal_5feffab4a44f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485001/normal_5fe4ead9eade9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391331/normal_5fdbb70857644.pdfIn PDF document text
    • http://copyright-notice-ig.com/sepibuworerjr6a.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/wopari/dezol.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/medicare_levy_exemption_2019_form.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/mechanical_engineering_refrigeration_and_air_conditioning.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_off0000d7d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D3 5560 bytes
SHA-256: 309eb7999b2ef19efe2d9684b1278b1c60c5aeeab55c84997bb0f1e42819c8fd
font_01_sfnt_off0000eaa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA9 10208 bytes
SHA-256: 742f233241c5c097fa18aa98932bc7f7bfffc3fda19814f152a4b2ea245610b3