Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e3fae67113ce2af…

MALICIOUS

PDF

72.5 KB Created: 2021-02-14 13:19:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 64b0e0003262259e57eef474eb9dc33a SHA-1: aefb09c9094ff4c0043bed82c8a1949cbea8c850 SHA-256: 9e3fae67113ce2af50a3d1741f3182ad47e2841fda40335b2b67646088912f50
226 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://jottigo.ru/wix?keyword=google+chrome+redirect+notice+disable PDF link annotation
    • http://vitrinachel.ru/paris_virtual_city_simulatorapu4o.pdfIn PDF document text
    • https://gonotelavekufuf.weebly.com/uploads/1/3/4/6/134615299/1098473.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450641/normal_5fc91de48daf7.pdfIn PDF document text
    • https://vixixufabajuwe.weebly.com/uploads/1/3/1/1/131163632/sosifunazozizepule.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457318/normal_60272a222ae7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_602410ca4b95b.pdfIn PDF document text
    • https://buvonage.weebly.com/uploads/1/3/0/9/130969236/3274636.pdfIn PDF document text
    • http://sudiwemubitep.22web.org/dozewakiruzoru.pdfIn PDF document text
    • https://teraludejos.weebly.com/uploads/1/3/5/3/135304334/xolavu_ladoxaziregogu.pdfIn PDF document text
    • https://bemakidej.weebly.com/uploads/1/3/0/7/130739127/rifulam-xiwavoberub-gajidinuxidi.pdfIn PDF document text
    • http://vukosam.22web.org/pdf_annotation_app_android.pdfIn PDF document text
    • https://vabomunebalobi.weebly.com/uploads/1/3/1/8/131856010/jigiguxo.pdfIn PDF document text
    • https://jokisutenewaj.weebly.com/uploads/1/3/1/4/131483229/tozexirif.pdfIn PDF document text
    • http://lunowizu.iblogger.org/bakery_logo_design_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386839/normal_5fd5f0f7805c5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gujemewemavud.rf.gd/tokiziwubiresipagavafi.pdfIn PDF document text
    • http://fuzariwa.rf.gd/bncc_matematica_ensino_fundamental.pdfIn PDF document text
    • http://tasobigadegef.epizy.com/benenden_health_claim_form.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_off0000df7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7C 5524 bytes
SHA-256: b16d6dbd7dd712fdeec5f7ed68cbf1268f9adb618728b569aa29a601bb6593d7
font_01_sfnt_off0000f215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF215 10196 bytes
SHA-256: c5907d3d7050d7a6855f2be62f8afc259383eed0ea5aa90d95a3ff775ba3d980