Malicious PDF — malware analysis report

Static analysis result for SHA-256 98ae32303adebc4f…

MALICIOUS

PDF

84.2 KB Created: 2021-09-24 02:20:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0b7d65037ded0fb728b2f1769d9c7269 SHA-1: fa847411c11dda0e1961834ce3fd0630934cc425 SHA-256: 98ae32303adebc4f31b2df7dea78d7ded66a627a993e868e9ac11e1b3ddf148f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are part of a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to exploit user interaction to navigate to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 https://smidgel.ru/uplcv?utm_term=free+movie+applications+for+android PDF link annotation
    • http://jimsclub.net/new/board/img_tinfo/file/20210904081410.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/93974011156.pdfIn PDF document text
    • https://apra.pl/files/file/gurarasalijuwinase.pdfIn PDF document text
    • https://gs-hemeringen.de/ablage/userfiles/files/23602538835.pdfIn PDF document text
    • http://tidomusica.com/uploads/files/202109090523244216.pdfIn PDF document text
    • http://heichapuzi.com/uploadfile/file/fukivusivomomokedazofix.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/161328c22c9f41---45499991453.pdfIn PDF document text
    • http://saigonradio.com/userfiles/file/kebesusaraxop.pdfIn PDF document text
    • https://hideab.se/tc/Mediagalleri/file/xowoxuguduxosewi.pdfIn PDF document text
    • https://giritrademark.com/content_files/files/sewer.pdfIn PDF document text
    • https://www.champagne-auge-dascier.com/ckfinder/userfiles/files/buxoxelapezesis.pdfIn PDF document text
    • http://kaymccarthy.com/immagini/file/19370041392.pdfIn PDF document text
    • http://spl-designs.com/ckfinder/userfiles/files/ludigoluvavabapewaxedu.pdfIn PDF document text
    • http://teewer.mn/ckfinder/userfiles/files/getekizutalarowejov.pdfIn PDF document text
    • http://majorpropertygroup.com/userfiles/files/95038130988.pdfIn PDF document text
    • https://prettygreekvillas.com/admin/fckeditor/editor/filemanager/connectofile/84030009785.pdfIn PDF document text
    • http://meandnetworking.com/ckfinder/userfiles/files/jozexigapakesekalizugevop.pdfIn PDF document text
    • http://globalbizkorea.com/userData/board/file/virojezizonoguzopusuwew.pdfIn PDF document text
    • http://technestudio.eu/userfiles/files/30530214218.pdfIn PDF document text
    • https://www.nissan-utilitaires-melun.fr/ckfinder/userfiles/files/17625172559.pdfIn PDF document text
    • http://kiddeefire.com/media/userfiles/files/bijukedakixujomefaluwu.pdfIn PDF document text
    • https://vidaleve.net/ckfinder/userfiles/files/46327698290.pdfIn PDF document text
    • http://onlinecommerce.bg/uploads/pages/files/89663678607.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613508ead0ad4---xekitabaxerulilivuw.pdfIn PDF document text
    • https://www.allduniv.ac.in/ckfinder/userfiles/files/migerelefalozudefiripoxob.pdfIn PDF document text
    • http://worldprint.su/userfiles/file/nejovovinidawanafivuw.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_off0000e30d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30D 18028 bytes
SHA-256: 22441f836849a58fa69b62d3302db60d310327815db37b4ea090f3c71f80899d
font_01_sfnt_off000111c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111C1 10824 bytes
SHA-256: e206cc041d9bdbd1c7e2f632005e43503b2edfa9a901fdfb9b6102ce07749b26
font_02_sfnt_off00012ab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1