Malicious PDF — malware analysis report

Static analysis result for SHA-256 565fd3e2382ae734…

MALICIOUS

PDF

76.1 KB Created: 2021-03-01 02:41:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 13b4b62671c2afc3d61a565c0d6763ea SHA-1: df5b987c193da269c4e405e949c12b33fc663f3f SHA-256: 565fd3e2382ae734d27267dedc3942b7c0a31ee324664d6b35fac57805b64865
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including ML classification and ClamAV, as malicious. It contains numerous embedded URLs, many of which point to disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution scheme. One prominent URL, 'https://leonvi.ru/wix?keyword=install+kingroot+v5.3.7.apk', directly suggests the download of an Android application, likely malicious.

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=install+kingroot+v5.3.7.apk PDF link annotation
    • http://figuxovutofid.mygamesonline.org/63768540369.pdfIn PDF document text
    • http://joblanc.xyz/charminar_movie_audio_songsbg1s6.pdfIn PDF document text
    • http://sunufosabupes.scienceontheweb.net/78598521030.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/fanekewavevak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505363/normal_6031d0d02fdf4.pdfIn PDF document text
    • https://wutuzorul.weebly.com/uploads/1/3/5/9/135963099/godozujugonumuv-dizetoxafixivid.pdfIn PDF document text
    • https://xesefuwaruju.weebly.com/uploads/1/3/6/0/136088059/ff6523e03dc0e.pdfIn PDF document text
    • http://kuzexamipapoxip.medianewsonline.com/2959395237.pdfIn PDF document text
    • http://dipenoguzel.sportsontheweb.net/8352836911.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475854/normal_5fc87aadb61c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385216/normal_601aab45b1816.pdfIn PDF document text
    • https://bobifadilow.weebly.com/uploads/1/3/5/2/135295989/8755648.pdfIn PDF document text
    • http://navevukosuso.mypressonline.com/price_action_scalping_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488130/normal_5ff2740db2318.pdfIn PDF document text
    • http://lomigakorak.getenjoyment.net/31572848247.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lumosaneja.onlinewebshop.net/tactical_combat_casualty_care_course_online.pdfIn PDF document text
    • http://nexogakaxeju.epizy.com/avast_antivirus_android_gratis.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_off0000e6ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AC 5448 bytes
SHA-256: 05fbba8ca3dbe0df40b597981a530f82a0dd50ce9454a1414565e877fd1f6274
font_01_sfnt_off0000f960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF960 13204 bytes
SHA-256: 03a7abfb3b7de6cce27f78c95291d2fa884967d72353b02e53788961156344b5

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