Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd17914ddd6fa4d7…

MALICIOUS

PDF

62.4 KB Created: 2021-09-09 07:27:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f03b87ec7577f96c4e93332d111e0830 SHA-1: bc491873d690283d7e952d2a30a50e3e7bf787f6 SHA-256: bd17914ddd6fa4d79242cfa0ae30c5af9ff0560db7b13004bf7323bfeff7eedf
102 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 hosted on disposable domains. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a deliberate attempt to create a link farm, suggesting a phishing or malware distribution scheme. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4784

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://eiffelflowersquesnel.com/userfiles/file/76807049157.pdf In PDF document text
    • http://dieta-plus.pl/userfiles/file/73668462277.pdfIn PDF document text
    • https://ms01bet.net/contents/files/39622400781.pdfIn PDF document text
    • http://fuyu.010bi.com/ckfinder/userfiles/files/mubuk.pdfIn PDF document text
    • https://newtech-utm.pl/userfiles/file/pojopuxesudogabisataro.pdfIn PDF document text
    • https://florerialafloresta.com/ckfinder/userfiles/files/fomobibibaxofokefirik.pdfIn PDF document text
    • https://samsunyapi.com/userfiles/files/64977190716.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/pagaderoso.pdfIn PDF document text
    • http://iphysiology.ru/upload/xexuvot.pdfIn PDF document text
    • http://hugslock.com/app/webroot/img/files/72775058836.pdfIn PDF document text
    • http://metalzilembo.it/userfiles/files/masuburi.pdfIn PDF document text
    • http://buyyoutubesubscribers.com/ci/userfiles/files/71132256257.pdfIn PDF document text
    • http://plantessentialoil.com/upload/files/jijufawelogafugiw.pdfIn PDF document text
    • http://www.florentmaussion.net/userfiles/File/xobejosojorogofatodoseda.pdfIn PDF document text
    • http://abhinavabhishad.org/userfiles/file/29265897421.pdfIn PDF document text
    • https://soosekszer.hu/upload/files/60063647871.pdfIn PDF document text
    • http://cbstav.cz/file/telewuvegagome.pdfIn PDF document text
    • https://ivanamihic.com/files/vadifitalizutajozagotuz.pdfIn PDF document text
    • http://joyear.com/ckfinder/userfiles/files/pudurabadibaliraribuje.pdfIn PDF document text
    • https://omprintandpack.com/userfiles/file/8443052323.pdfIn PDF document text
    • http://ruizhishengwu.com/uploadfiles/file/080603084954.pdfIn PDF document text
    • http://shopcloud.cloud/ckfinder/userfiles/files/13739751654.pdfIn PDF document text
    • https://imahima.xyz/js/ckfinder/userfiles/files/86732804433.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/43011181324.pdfIn PDF document text
    • http://amidoux-peintures.com/ckfinder/userfiles/files/vudodofegunikokopub.pdfIn PDF document text
    • https://www.hippocratio.gr/ckfinder/userfiles/files/nupebezilipexalunujopezul.pdfIn PDF document text
    • http://logistra.fr/ressource/site-image/files/15980649195.pdfIn PDF document text
    • https://108pizza.pl/uploads/userfiles/files/puwojumedazomixas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=a+quiet+place+2+streaming+onPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE326 11064 bytes
SHA-256: 3d2f7c62f2fc29ce2c753bde9bd8c5a9bdbf52a4afe0e1e182de779a04258cf1

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