Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea0840eaabf12042…

MALICIOUS

PDF

85.2 KB Created: 2021-09-17 08:30:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: cf7a827ea4ef2962baac4b3133e1bdee SHA-1: 2ec7a612c4d905685499ab9087680c32dda27542 SHA-256: ea0840eaabf12042fda4e11c61e58e13570b982bbb79428838ac021c37558858
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and a machine learning classifier. It contains embedded JavaScript and numerous external URIs pointing to potentially malicious domains, indicating an attempt to redirect users. The PDF structure and the presence of JavaScript suggest it's designed to exploit PDF vulnerabilities or trick users into visiting harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://oniceh.ru/uplcv?utm_term=best+android+app+to+count+steps PDF link annotation
    • http://purofirstli.net/userfiles/file/sesetekonawolemogol.pdfIn PDF document text
    • https://gad-elhak.com/userfiles/file/jabevalekajajifisenevud.pdfIn PDF document text
    • http://brenderup.ro/mm/file/12197774484.pdfIn PDF document text
    • http://realestatespoznan.com/uploads/nawopagaduxite.pdfIn PDF document text
    • http://antichigelsi.it/userfiles/files/22537211874.pdfIn PDF document text
    • https://kingcom.edesign.fr/gr33/web/uploads/assets/file/4122863912.pdfIn PDF document text
    • http://saluteebenesseresas.it/userfiles/files/83973246993.pdfIn PDF document text
    • https://duocvinhkim.com/userfiles/file/sesadomag.pdfIn PDF document text
    • http://imobilestore.de/userfiles/file/zizutevazerolezopedof.pdfIn PDF document text
    • http://fusen-es.info/yamituki-n/uploads/files/mozole.pdfIn PDF document text
    • http://laiksmodalux.lt/app/webroot/uploads/userfiles/files/mesozetixag.pdfIn PDF document text
    • http://formpart.com/upload/ckfinder/files/14188209230.pdfIn PDF document text
    • https://ecowaytechnologies.com/ckfinder/userfiles/files/xidubulafilij.pdfIn PDF document text
    • http://studiofagiani.eu/userfiles/files/rojalimesifuzofaxigi.pdfIn PDF document text
    • http://kaies.cn/upfiles/file/6129473886.pdfIn PDF document text
    • https://institut-arabe.org/ckfinder/userfiles/files/65927169949.pdfIn PDF document text
    • https://yasacompany.com/upload/files/tetetoxitopulurax.pdfIn PDF document text
    • http://studio-castiglioni.com/userfiles/files/kerof.pdfIn PDF document text
    • https://forumsevens.com/images/file/99218775654.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/sepegukowoxizuvozawerun.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161372bad4a61e---potujagimupupepe.pdfIn PDF document text
    • http://zhymwz.com/upfile/file/26127755837.pdfIn PDF document text
    • http://www.medicellbank.com/userfiles/files/9331782611.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/wifiwojat.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_off0000ea7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10294 10612 bytes
SHA-256: 6feed798e2d097eb34d27a370621f1b5b6524e1f32b836f012e07f96023c106d
font_02_sfnt_off00011afe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AFE 17180 bytes
SHA-256: 87103b707e7938071e9774a546eac3a16259eea422766186c3d99bf2e9cfb7c0

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