Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b38523f61490079…

MALICIOUS

PDF

61.2 KB Created: 2021-09-09 06:52:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4e375a0f34fa2c56145e00f1eed73466 SHA-1: 6e844add3c99416ccfc0eac610b097aa5881d5ab SHA-256: 0b38523f61490079492795e3ebf24814dc32b86b8f7ca02cc4ae355de93cecee
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which point to disposable domains, suggesting a link farm or phishing campaign. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this, indicating an attempt to distribute malicious content or phish users through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5382

Heuristics 4

  • 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.
  • 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 https://garglob.ru/uplcv?utm_term=how+to+watch+movies+on+android+box PDF link annotation
    • http://bajcsidavidfoto.com/_user/file/tedasenarakesevosomiwusuk.pdfIn PDF document text
    • http://posuni.com/userfiles/file/pawuju.pdfIn PDF document text
    • https://carrieres-pierre.com/userfiles/file/60476735765.pdfIn PDF document text
    • http://bancasemecanino.com/userfiles/files/sisix.pdfIn PDF document text
    • http://baraanduliaptti.org/userfiles/file/wezumoseruxik.pdfIn PDF document text
    • http://3e-machinery.ru/app/webroot/filesfiles/dobadimibizixapanobipemo.pdfIn PDF document text
    • https://dichvumoinoi.com/ckfinder/userfiles/files/siwetiwazob.pdfIn PDF document text
    • http://thewhitmerlawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/peporiwodatabanoda.pdfIn PDF document text
    • http://thebankcardservice.com/uploads/files/20958765709.pdfIn PDF document text
    • https://tsegypt.com/file/1142990379.pdfIn PDF document text
    • http://5lovestartw.com/CKEdit/upload/files/62457738509.pdfIn PDF document text
    • http://tsnpharma.com/upload/files/71062718180.pdfIn PDF document text
    • http://memsports.com.br/admin/libs/ckeditor/ckfinder/files/71688666291.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/a3031ccf16b9d0c02b69cea9caccd8ac/41697883677.pdfIn PDF document text
    • https://cfi-registration.org/buzzboxgift/img/userfiles/files/53356122874.pdfIn PDF document text
    • https://bibliothequedesarts.ch/ckfinder/userfiles/files/narin.pdfIn PDF document text
    • http://irinaburmistrova.ru/files/76853724077.pdfIn PDF document text
    • https://stotex.rs/files/53802477569.pdfIn PDF document text
    • http://idrogastermoclima.it/Utentifile/FCKPage/file/68068108396.pdfIn PDF document text
    • http://deborahmayerlawoffices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rorebagaf.pdfIn PDF document text
    • http://sino-web.net/filespath/files/20210907185621.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16138411c614b6---mewiviwijetukoku.pdfIn PDF document text
    • http://paraglider24.de/pics/fotos/1/file/papujosipopilegidosuxuvuj.pdfIn PDF document text
    • http://mirai-kankyo.com/userfiles/files/pufowigojemazifakatoze.pdfIn PDF document text
    • http://bscsaoner.in/ckfinder/userfiles/files/95756879007.pdfIn PDF document text
    • http://zimmerei-possert.at/16959127491.pdfIn PDF document text
    • 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_off0000d89a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD89A 10972 bytes
SHA-256: ed4af53a5e01143a84fdfea619a3f85eed115bacf5e1cbca8dadd3c396e37c83

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