Malicious PDF — malware analysis report

Static analysis result for SHA-256 e03e1eee581d50bb…

MALICIOUS

PDF

79.0 KB Created: 2021-09-15 18:41:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 30805de1800fcfc5d4862b7920e5dbb8 SHA-1: 2a0d0116e33c03dfcd7b01d1548294ff3b05a235 SHA-256: e03e1eee581d50bba6fba17f5073782bd1a72c5810a07a7b25ccf7ab965e2107
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, strongly indicating a malicious intent to redirect users to potentially harmful websites. The ML classifier and ClamAV detection further support this assessment, flagging the file as malicious phishing content. The embedded JavaScript likely facilitates the redirection or exploitation process.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 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.
  • 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://huntic.ru/uplcv?utm_term=android+factory+reset+without+pin PDF link annotation
    • http://medicom.pl/userfiles/file/rijunutim.pdfIn PDF document text
    • https://sibois.eu/userfiles/file/golanelapifapulegexewa.pdfIn PDF document text
    • http://xn--j1aai7d.xn--p1ai/userfiles/file/gigororuzezejepi.pdfIn PDF document text
    • http://hmondo.com/userData/board/file/98385032174.pdfIn PDF document text
    • https://ferropula.hr/files/digijaxoxokarevasi.pdfIn PDF document text
    • http://uro-medical.pl/zdjecia/fotki/file/zilitam.pdfIn PDF document text
    • https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/10346555516.pdfIn PDF document text
    • https://shreegroupco.com/userfiles/file/25921199572.pdfIn PDF document text
    • https://menuiserie-sainte-anne.fr/userfiles/file/10245272477.pdfIn PDF document text
    • http://tsutae-f.com/js/upload/files/51862966327.pdfIn PDF document text
    • http://machi-tomo.xyz/js/ckfinder/userfiles/files/31843425866.pdfIn PDF document text
    • https://playerpress.com/ckfinder/userfiles/files/vidonorutubudo.pdfIn PDF document text
    • https://behagi.eus/files/galeria/files/70235219675.pdfIn PDF document text
    • http://grupophi.es/uploads/files/pagesirenam.pdfIn PDF document text
    • https://nepalfinepashmina.com/userfiles/file/54060029682.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/dec246b0d92b25d1f5acd4864842a0c0/14661754920.pdfIn PDF document text
    • https://zenmobile.in/jaipriyart/uploads/files/29515731433.pdfIn PDF document text
    • http://raylutickenterprises.com/userfiles/files/850952060.pdfIn PDF document text
    • http://fiumevivo.it/userfiles/files/terekalokajukaxuromanodu.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/161313d7b8e09f---fewunujubepoxurubotul.pdfIn PDF document text
    • http://eco-building.cz/UserFiles/File/nebike.pdfIn PDF document text
    • http://isagenixmakessense.com/ckfinder/userfiles/files/tozivakomuta.pdfIn PDF document text
    • https://www.gurgy.net/ckfinder/userfiles/files/86188751283.pdfIn PDF document text
    • http://0vote.com/ckfinder/files/wuzafamipeputudegevadofe.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_off0000cd7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD7F 10952 bytes
SHA-256: 607c69edcd613e5251bb907be619017386df7cddf10b873f9205019ea4312b82
font_01_sfnt_off0000e6ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6EE 18512 bytes
SHA-256: 1519975ec132a65e534265a09f6c833f9d38b21543061a17e8b72d5ec7c3c273
font_02_sfnt_off0001169f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1169F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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