Malicious PDF — malware analysis report

Static analysis result for SHA-256 20dd0bffc8c29344…

MALICIOUS

PDF

75.2 KB Created: 2021-09-12 23:18:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9b231a583c144b59b5ccb7b81cae7969 SHA-1: bf69fb61dda4ce165784ec50db2bbb0ff9a993c9 SHA-256: 20dd0bffc8c29344a5a61aed9c7497e1989233f6188f9f0f319552678d6d1aa3
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable domains, indicating a link farm designed to obscure malicious destinations. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript (T1059.007) suggests an attempt to execute code within the user's browser or PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://iveducentar.com/uploads/assets/file/78751465188.pdf In PDF document text
    • https://sunriseinnjasper.com/nbloom/fckuploads/file/kenomiwuginebetokavewokor.pdfIn PDF document text
    • http://volareinmongolfiera.it/userfiles/files/gopatumazawafapikapo.pdfIn PDF document text
    • http://noithatmyhome.com/img/files/depakara.pdfIn PDF document text
    • http://manenshop.com/upload/files/xalawut.pdfIn PDF document text
    • http://regalmotors-jp.com/js/upload/files/14689962858.pdfIn PDF document text
    • http://theclelandgroup.com/img/upload/file/11034678938.pdfIn PDF document text
    • http://h-n-s.net/userfiles/file/29030571959.pdfIn PDF document text
    • https://sharkovinkom.com/sharkovinkom.com/ckfinder/userfiles/files/83989257565.pdfIn PDF document text
    • https://laps.pl/userfiles/file/gesotote.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/lubugu.pdfIn PDF document text
    • http://jcpingie.be/public/files/sejoli.pdfIn PDF document text
    • http://minerva-collection.net/files/files/pafibomeparizesamiwojomiv.pdfIn PDF document text
    • http://nickelsgrafikdesign.de/ckfinder/userfiles/files/gedipafaxaxuvikuku.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/67959308842.pdfIn PDF document text
    • http://ellenia3.eu/userfiles/files/57008877902.pdfIn PDF document text
    • http://murielbellhomes.com/userfiles/files/nemofer.pdfIn PDF document text
    • http://xn----8sbfhu6ab4bqv.xn--p1ai/userfiles/file/31241235699.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021091001353056.pdfIn PDF document text
    • http://grafitym.kz/files/file/85988432573.pdfIn PDF document text
    • https://perfumes.dropship-tracking.com/userfiles/files/vawixojudelojaxogapom.pdfIn PDF document text
    • http://ieltsadd.ir/cache/fck_files/file/famokajorojugaxegubaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=ek+paheli+leela+full+movie+download+filmywapPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/161398be907699---vozijexifupivi.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_off0000c0e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d8fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8FC 10836 bytes
SHA-256: 50cbcd1dce296bbca142723fb735e098639b14a44c1108c790699a6140abfcf7
font_02_sfnt_off0000f1cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CF 17708 bytes
SHA-256: 2799f45672042422a6c9bbc1364cbd0badabffe9b1a8337bd064b0951b503eb8

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