Malicious PDF — malware analysis report

Static analysis result for SHA-256 2972356bd5aea65c…

MALICIOUS

PDF

84.3 KB Created: 2021-09-14 10:10:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: fc00b5d81b62ee59fec91d7ca98ba2cf SHA-1: 97311fa8e943c8d3350a327bfdb42a4ef64a34b0 SHA-256: 2972356bd5aea65c2a280c07c28f1b41a3e540e2c72bddd9d110ce82c32d9a18
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maurovalleferroarchitetto.eu/userfiles/files/20091029396.pdf In PDF document text
    • https://munis-roquesalbes.cat/demo/vilalba/imatges/file/87693537024.pdfIn PDF document text
    • https://keralahappyjourney.com/ckfinder/userfiles/files/nevolalalomupajopo.pdfIn PDF document text
    • https://matratva.in/userfiles/file/vozawe.pdfIn PDF document text
    • http://aptekarynek.pl/zdjecia/fck/file/54465458473.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613e2c16af3fa---vasema.pdfIn PDF document text
    • http://castel.lu/userfiles/files/loneduwonewitopaguzisin.pdfIn PDF document text
    • http://www.dogwoodagility.nl/ckfinder/userfiles/files/63433420331.pdfIn PDF document text
    • https://topclassgreenery.nl/images/file/39889718960.pdfIn PDF document text
    • http://cathugo-yachts.de/res/wysiwyg/file/moxaligaf.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132a69e3bfe4---80946539492.pdfIn PDF document text
    • https://pasationtravellers.com/root/FCKeditor/file/61240147449.pdfIn PDF document text
    • https://cpsguffanti.com/uploads/file/pexux.pdfIn PDF document text
    • http://humansharehouse.com/userData/board/file/70151087398.pdfIn PDF document text
    • https://www.tvmreza.tv/ckfinder/userfiles/files/faluripusoda.pdfIn PDF document text
    • https://ngusacdon.com/upload/files/guribasufemixuvixibumu.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/xutawitupom.pdfIn PDF document text
    • http://audyt.rowerowaszkola.pl/imgturysta/files/xemisudemogizufikux.pdfIn PDF document text
    • http://vaness-sens.fr/ckfinder/userfiles/files/95460701004.pdfIn PDF document text
    • http://lulanjina.net/upload/files/kiner.pdfIn PDF document text
    • https://www.info-service.com.tw/plugin/ckeditor/ckfinder/userfiles/files/saxeko.pdfIn PDF document text
    • https://jmtours.co/aym_image/files/83861756853.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=nudgee+parent+portalPDF 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_off0000e6bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BF 17664 bytes
SHA-256: 3c59349bca95ad6e75d9c649c26bff7f1395c3f6e091622c6c57cb9942b81976
font_01_sfnt_off00011492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11492 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CA9 10384 bytes
SHA-256: 7a7bfb57b00dea759bde7cc8908556c5fba4c32f475917debe9b4c054060e10f

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