Malicious PDF — malware analysis report

Static analysis result for SHA-256 db644eeab6039038…

MALICIOUS

PDF

69.6 KB Created: 2021-02-09 13:46:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 730129751c1e21e2b7feca29eabaac99 SHA-1: d1a1e29f90d488bf84b7b7877e43d628071dc3b7 SHA-256: db644eeab6039038565bb57054e7188de8653336db69519d63a9f4d0e58d725a
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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/wb?keyword=subject%20pronouns%20spanish%20to%20english%20worksheet PDF link annotation
    • https://xuvuvigaxopezut.weebly.com/uploads/1/3/4/7/134721928/1276152.pdfIn PDF document text
    • http://usechambre.xyz/parabola_with_vertex_at_h_k_worksheetls1cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448713/normal_5ff420cf2c2a2.pdfIn PDF document text
    • https://betataniboluwi.weebly.com/uploads/1/3/0/9/130969090/lebobopuwef.pdfIn PDF document text
    • https://pubedazemel.weebly.com/uploads/1/3/4/8/134870130/77e8038d25de40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405644/normal_6019568514ecb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454984/normal_6015b9b2ee535.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375204/normal_5fdb519330c0b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422918/normal_5fe2e057a8694.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380692/normal_5ff4dea2acb37.pdfIn PDF document text
    • https://jodutofafedabaf.weebly.com/uploads/1/3/1/4/131452959/487580.pdfIn PDF document text
    • https://likerediweraj.weebly.com/uploads/1/3/4/6/134691167/xixagen.pdfIn PDF document text
    • http://igme.site/xarixowonofkcff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485442/normal_5feb5e73bed15.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377931/normal_6002ee6b9da34.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000cec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEC5 5672 bytes
SHA-256: 45087da9d04e7e9e188aff6753b66d111985687876435f3fd8e26cc6bcb824a4
font_01_sfnt_off0000e21c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21C 12220 bytes
SHA-256: 83589212ba1c93824eb96a2eee8790ebaba41674d49afdd441dc1ca107bf5bb8