Malicious PDF — malware analysis report

Static analysis result for SHA-256 44431632975cfd30…

MALICIOUS

PDF

72.8 KB Created: 2021-02-15 06:41:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2942d3770c5b4fc5b110cb007bfaad0f SHA-1: 477d1ef458cb7d858e9b2b1654f85225304fd59c SHA-256: 44431632975cfd304089e8f6c6cdf6c4b9085a2cd367d72253c9c313659cd216
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baarspo.ru/wix?keyword=read+the+other+boleyn+girl+online+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4403817/normal_5ff3b6b946c75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485942/normal_60251d71dfcff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471995/normal_5ff4a57248063.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372100/normal_5ff3f71b82139.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444115/normal_60002e8f5bb2c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409095/normal_5fcd6a0468a7a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445106/normal_5ff6b410327c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423772/normal_5fdafdb5906eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489848/normal_600548a17f300.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465548/normal_601802ee40965.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390642/normal_601494fc5ad7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415291/normal_600abac5e5deb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366978/normal_6004f40c80cb4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383128/normal_5ffb9b400b388.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/gofilafixu/lugaropojewipujirewatiset.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/57660675826.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/65493196956.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/36088152517.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_off0000df55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF55 5376 bytes
SHA-256: 124ef7ffd81b888e3ffdbe9bb4af1a608179ecda8e3c842ad5cd1136b6ce295e
font_01_sfnt_off0000f1a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A3 10532 bytes
SHA-256: c6e9fd2dd7ac263f42dbdfe2fb1afdce002576da4907ea8a0ba6a4af9aa3c349