Malicious PDF — malware analysis report

Static analysis result for SHA-256 90e0b65b8d3cb1c9…

MALICIOUS

PDF

77.9 KB Created: 2020-12-15 12:51:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 2d34c6760eeeca99164df851005077c3 SHA-1: 41013bca33f9aa5f11ba8ccb1148dc9df4f3e77d SHA-256: 90e0b65b8d3cb1c975ef80796bb84689201b4a2c3d9f8c488d2f03ed5bf72b96
194 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/wb?keyword=reporte%20de%20central%20de%20riesgo%20gratis%20colombia In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381788/normal_5fb51b09ba2eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374976/normal_5fbbdd76691a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381551/normal_5f951b9b3decf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370077/normal_5f884bb305770.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378170/normal_5fcbebf7e0e99.pdfIn PDF document text
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/05b734d25c.pdfIn PDF document text
    • https://dinelelulom.weebly.com/uploads/1/3/4/3/134308509/a2877d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412170/normal_5fa3e81192984.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368227/normal_5f9430cd597f3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406466/normal_5fc7433682f80.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/sorapobuk/dawiziguja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68ec6c97-89ef-4ea2-9476-9b37d31cfe35/fuviwozub.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/lafixifepo.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/web_advertising_journal.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/72949753074.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_off0000f110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF110 5540 bytes
SHA-256: a2d37415459351945438ef38dc7239f5e3f8e4f58518f34a67c0379cc9f1a477
font_01_sfnt_off000103ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CE 11376 bytes
SHA-256: 3078fd57871bfecb47242fc601dec25ff6d43ffab043e1deb45f5fc89220ffe4