Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a472f3420583f3c…

MALICIOUS

PDF

71.2 KB Created: 2021-02-20 13:30:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: dc5d9436f9c54643f4a51f1a1e8ba6de SHA-1: f663515b3e6775f530bf9ad55b94d23011f386c8 SHA-256: 5a472f3420583f3ce5685fce84556306bf8dd91dd5cc1c10549b812db530826f
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wix?keyword=amazon+prime+app+mod+apk PDF link annotation
    • https://cdn.sqhk.co/wefadegese/cjiQzgh/duzewuvuniwojijulamux.pdfIn PDF document text
    • https://cdn.sqhk.co/bexutavukaro/bie9Ric/kixunebot.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/jhhqnAz/safebetifigakugerima.pdfIn PDF document text
    • https://zawoxabupuw.weebly.com/uploads/1/3/5/9/135990747/5738692.pdfIn PDF document text
    • https://cdn.sqhk.co/fudamozomeb/eih0jij/gitafejag.pdfIn PDF document text
    • https://cdn.sqhk.co/wabasenenem/hPgecRQ/wokovi.pdfIn PDF document text
    • https://cdn.sqhk.co/medujebukoma/hia0jac/3442593589.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/jezaxojipevu/70223272432.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/19333261409.pdfIn PDF document text
    • http://xizokokov.epizy.com/lauderhill_police_incident_report.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/forasizapoduwuteta.pdfIn PDF document text
    • http://pumatelikowe.epizy.com/40821393830.pdfIn PDF document text
    • http://zekovulelopur.epizy.com/zavagove.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/alexa_app_android_hands_free.pdfIn PDF document text
    • http://mamisiz.rf.gd/bienestar_psicologico_tesis.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_off0000db91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB91 4996 bytes
SHA-256: a304d4e3f05ba5d0cd51ee60cf62ccb919faa1e25a4af4d068ad473e86bd6f63
font_01_sfnt_off0000ec7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7F 10412 bytes
SHA-256: 0d001846df7da5f773f1ef3d3838fed8596e71039d209a062ffb96426d099e96