Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3fd93bd803d8cba…

MALICIOUS

PDF

69.9 KB Created: 2021-02-15 07:01:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 43003cf49ff1cba757df8eaa1a8bee8d SHA-1: 18a6d3362f384011c31e0a4cdd8aa4f52bbf8167 SHA-256: f3fd93bd803d8cbab907fb33bf1a60d363cacc4cf83b2f3e282863e8dbf86d43
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/123?utm_term=white+rodgers+1f80-361+battery+replacement PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4381534/normal_5fcca463ef9ad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388279/normal_5fc995463712f.pdfIn PDF document text
    • http://lnstagramcopyrightservices.org/rimawiwidemamektub1n.pdfIn PDF document text
    • https://cdn.sqhk.co/fojilude/aLihAGk/51963216088.pdfIn PDF document text
    • https://cdn.sqhk.co/sumefixes/hhijc1u/jilumun.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388271/normal_5ffd0f947b14a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405644/normal_6024786b605a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453332/normal_6029add7ecc09.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462059/normal_5feb36d436bac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479433/normal_60266a439e16b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415331/normal_60039ffd53059.pdfIn PDF document text
    • https://cdn.sqhk.co/zewuxumaro/agcjiZ5/23797370065.pdfIn PDF document text
    • https://cdn.sqhk.co/vomisape/iaji0k9/tajoxasowefenujexe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474739/normal_60094bce7f055.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/nitajosasa/6413680788.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_off0000d15e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD15E 6560 bytes
SHA-256: 72e8f4e56f7b3e5cc18f05512287a5587b8d6861ffadfd5f0cc8726d3b01f340
font_01_sfnt_off0000e7a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A1 10364 bytes
SHA-256: 19b0cf8ba0e6b9a03a3d649eda12ac8ee87c7b8415ecb411592ef4b02cb3ab9c