Malicious PDF — malware analysis report

Static analysis result for SHA-256 86b721a5949e987a…

MALICIOUS

PDF

78.7 KB Created: 2021-09-10 07:59:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 2572b6ef131502dd860d49c6ac0cbf79 SHA-1: 4708ab0304b54921484b16c8e4ccb4aa37d8e3f5 SHA-256: 86b721a5949e987aac419d690e351a8ef7017da4880692efdbc1a19f8262365f
154 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://aordonez.com/images/contenidos/files/rinafupevezoxijipatomi.pdf In PDF document text
    • https://mygrind.ie/userfiles/file/tuwudo.pdfIn PDF document text
    • http://iaestedresden.de/userfiles/file/parobogodatibiguw.pdfIn PDF document text
    • https://sibconsulting.com/contents/files/fafuku.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16132fac3cac4c---56664828818.pdfIn PDF document text
    • https://stepweystudy.com/ckfinder/userfiles/files/31976242197.pdfIn PDF document text
    • http://fantalife.nl/userfiles/file/pimeb.pdfIn PDF document text
    • http://lica.plovdivweek.com/js/ckfinder/userfiles/files/31479407075.pdfIn PDF document text
    • http://gelinyuanyi.com/upload_fck/file/2021-9-4/20210904131822360529.pdfIn PDF document text
    • http://nicolalazzarotto.com/userfiles/files/bokoxikeke.pdfIn PDF document text
    • http://www.galiantsolutions.com/emailimages/file/70469441202.pdfIn PDF document text
    • http://clubesquilacoma.com/uploads/files/82161771288.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac504b744b---7502363360.pdfIn PDF document text
    • https://serihosting.com/calisma2/files/uploads/50432407244.pdfIn PDF document text
    • http://www.shjkyq.com/up_files/FCK/file/maxadalusewubaduxarotokid.pdfIn PDF document text
    • https://www.stnedu.com/ckfinder/upload/files/1776040354.pdfIn PDF document text
    • http://ginzaramen.us/uploads/files/wunalisezixarezibo.pdfIn PDF document text
    • http://justsayhi365.com/uploads/file/ziminunotijufewi.pdfIn PDF document text
    • http://aldobini.it/userfiles/files/lokejeludobatonorer.pdfIn PDF document text
    • http://zvezda-rostov.ru/ckfinder/userfiles/files/75432782322.pdfIn PDF document text
    • http://intimatehotelpattaya.com/image/upload/File/kuwotikafiboledesumidibap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=train+sim+pro+downloadPDF link annotation
    • http://irodori.kir.jp/files/file/suzojosegalapalu.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d03f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD03F 17524 bytes
SHA-256: 5dba7f41f5368b538dd0cdc193c2bc666872e6c9718a99beb79432a512b58000
font_01_sfnt_off0000fe1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE1C 10372 bytes
SHA-256: 7c6bd16dea5892b6aaac15d92a4403623631a97192c457d3ffeb037a6ff92634
font_02_sfnt_off0001157d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1157D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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