Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fda9bbf223935bb…

MALICIOUS

PDF

71.4 KB Created: 2021-03-03 05:16:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 16d804b4a1f7cac5ed865d2a0800c6b1 SHA-1: 4d428dd1704f08af52e3a4264440bb8df9b170ff SHA-256: 2fda9bbf223935bb9859b5a5a9344717f7fff22c4b047faaaec432914d8426c4
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/wb?keyword=thich%20nhat%20hanh%20how%20to%20pronounce%20his%20name PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4452595/normal_5ff0a551556f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377931/normal_602251415ce21.pdfIn PDF document text
    • https://wabezapodila.weebly.com/uploads/1/3/1/4/131437306/novepoludewenet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479673/normal_6022d44144761.pdfIn PDF document text
    • https://webegerux.weebly.com/uploads/1/3/4/7/134759049/9763790.pdfIn PDF document text
    • https://cdn.sqhk.co/lexebogefaj/4BGjcTM/90584964992.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428035/normal_600840d1d30f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407087/normal_6017336b53140.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488141/normal_602e36bc423ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427104/normal_60267494ddf18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389820/normal_6025f8a56ba44.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366306/normal_5ff48627de877.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449184/normal_601ca729a88c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373239/normal_60342da3c000a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jenesigafepi.epizy.com/tasinivezebojuri.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_off0000db8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB8F 5184 bytes
SHA-256: 8596be92165ece1833e4b8608815c5d4592cc3a7854b044d26922ea8e073ab6a
font_01_sfnt_off0000ed1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1C 10604 bytes
SHA-256: b6b5de9df477949c75305a2c1e1627d59f68555c240d1336962cf1f9cfe1c155