Malicious PDF — malware analysis report

Static analysis result for SHA-256 45e696ac3bc77f6b…

MALICIOUS

PDF

77.7 KB Created: 2021-09-16 17:45:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f9d332a837edc04059b3ca3d1417ee9c SHA-1: e4629ba114fd28f1cb26006d4d53498a795ba2f1 SHA-256: 45e696ac3bc77f6b06ab2cf0b701c5d9233507a6bc9660eb50a94905d5cc4c90
126 Risk Score

Malware Insights

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

The file is a PDF identified as malicious by ML classifiers and ClamAV, with heuristics indicating it's part of a link farm. The embedded URLs, particularly the one pointing to 'seychelles-resort.com', suggest an attempt to redirect users to potentially malicious content. Although no scripts were explicitly extracted, the PDF structure and the nature of the heuristics point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • 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.
  • 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 http://seychelles-resort.com/images/blog/file/xepufixiruzavovaworul.pdf In PDF document text
    • http://hrt-foto.hu/_user/file/99199529352.pdfIn PDF document text
    • http://tg-focus.ru/userfiles/files/47052992449.pdfIn PDF document text
    • http://www.ufolep-69.com/contenus/files/viruma.pdfIn PDF document text
    • https://nullemont.fr/nullemont/ckfinder/userfiles/files/xesodevigema.pdfIn PDF document text
    • http://choragwica.pl/userfiles/file/32634474739.pdfIn PDF document text
    • https://elmaga.lt/components/com_mijoshop/opencart/image/data/files/13387742725.pdfIn PDF document text
    • https://weldingportal.it/userfiles/file/69237984122.pdfIn PDF document text
    • http://all-paca.com/ckeditor/ckfinder/core/connector/php/uploads/files/97427758265.pdfIn PDF document text
    • https://novamakine.com/upload/ckfinder/files/zogadoxoroxedoxifinila.pdfIn PDF document text
    • https://alienaquatics.com/home/gb/public_html/ckfinder/userfiles/files/36261663152.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613dbc049bff4---28237973048.pdfIn PDF document text
    • http://aotem.com/data/home/qxu1780220113/htdocs/uploadfile/files/guriginijasoxisu.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/losumisipoxuwem.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161371f1b2d59d---rugirudaxe.pdfIn PDF document text
    • https://pointswestliving.com/ckfinder/userfiles/files/wifazoga.pdfIn PDF document text
    • http://starfishdowney.com/uploads/files/nugobonugefux.pdfIn PDF document text
    • http://veszpremlizards.hu/_user/file/kaxuzaxuwoxobukexeb.pdfIn PDF document text
    • http://hatdesechia.com/storage/ckfinder/files/gobosot.pdfIn PDF document text
    • http://industrialsupplies.pk/userfiles/files/juzadabogobo.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/marinawabup.pdfIn PDF document text
    • http://saatgaamkansarasamaj.com/admin/uploads/files/jibives.pdfIn PDF document text
    • http://colantuono.it/userfiles/files/xawus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=india+england+cricket+live+streamingPDF link annotation
    • 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_off0000cdbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDBE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e5d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D0 16560 bytes
SHA-256: f83b7621726b65b7fc27733ebaf9d69408f90a9a0f25056bfd9b93910f7210cb
font_02_sfnt_off000110b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110B2 10700 bytes
SHA-256: 9c9ef00e9eff8b359b97a4282b197dc38ba5a5059d97d4e9b1995032d7affcfc

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