Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee43e22533505ec7…

MALICIOUS

PDF

71.2 KB Created: 2021-09-17 03:01:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4c17b59198526724e5ac3f6a7bb35ff8 SHA-1: dc5e1c57ce1311327c7fea8c7d15e5a9f2a2b884 SHA-256: ee43e22533505ec7122311c1e472e59cb5888c30e4e037dc4864cf5aee7a1f66
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which are part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites or download further malware. The presence of JavaScript suggests an attempt to exploit browser vulnerabilities or execute malicious code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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=com+google+android+apps+photos+permission+google+photos PDF link annotation
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/forijomawarekileb.pdfIn PDF document text
    • http://rentbucharest.net/images/userfiles/97289427301.pdfIn PDF document text
    • https://dichvuketoansg.com/luutru/files/sufuxovutipipi.pdfIn PDF document text
    • http://reichspfarrer.sk/file/20404896958.pdfIn PDF document text
    • http://kahasat.cz/data/file/radage.pdfIn PDF document text
    • https://efficientinfocomm.com/ckfinder/userfiles/files/takirivalipororuwawo.pdfIn PDF document text
    • http://emachn.com/data/attachment/file/mofiwofefexewatazavi.pdfIn PDF document text
    • https://vieclamday.com/userfiles/file/gefudetaxumojifusofenile.pdfIn PDF document text
    • https://chptravel.ir/data/file/lidawixuv.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/77117262091.pdfIn PDF document text
    • http://www.ernakulamarchdiocese.org/www/js/ckfinder/userfiles/files/zazadib.pdfIn PDF document text
    • http://munnarteabungalows.com/userfiles/file/86808313333.pdfIn PDF document text
    • http://fairbank-ia.org/admin/ckfinder/userfiles/files/fidisebono.pdfIn PDF document text
    • http://permanentnimakeup-brno.cz/userfiles/files/66248200749.pdfIn PDF document text
    • https://tradingphrases.com/userfiles/files/rorisawugepozujezat.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/161408b1aefc0a---wamivikodosejud.pdfIn PDF document text
    • https://office-agglo-larochelle.fr/userfiles/file/20168289286.pdfIn PDF document text
    • http://harposwebdesign.nl/app/webroot/files/userfiles/files/mujutavevitaweto.pdfIn PDF document text
    • http://szerecsen.hu/editor_up/lemoxurapexe.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/50223476105.pdfIn PDF document text
    • http://marleenjansen.nl/images/uploadfiles/33748849149.pdfIn PDF document text
    • http://bulgankhangai.mn/userfiles/files/puxelu.pdfIn PDF document text
    • https://nergizleryapi.com/image/files/bixoj.pdfIn PDF document text
    • http://massimomoroni.it/userfiles/files/81566787484.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_off0000b6a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ceb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB3 15372 bytes
SHA-256: be3a7434fc33f343876d6620fbd6b180d7fb9913ce7c939554f2f0032dc8ac01
font_02_sfnt_off0000f5a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A8 10868 bytes
SHA-256: 9103b9723fe7a8c4945c23cd33a9f200b45a2992c9ff313a3929c1ecfaf8b33c

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