Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e6422a2c930ea6b…

MALICIOUS

PDF

81.8 KB Created: 2021-09-13 11:03:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 92106ae10ac5106159f9add83f0956ef SHA-1: 6d543b59b170f07689b15d76ab518176c8c27c66 SHA-256: 9e6422a2c930ea6bebbb424db3f32ce0b8456071fc1fab296f19096225fa5d31
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to suspicious PDF files hosted on various domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of these URLs being part of a link farm designed to distribute malicious content. While no scripts were directly extracted, the structure and URL patterns suggest a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 4

  • 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://globalathena.com/ckfinder/userfiles/files/nitotasejonotog.pdf In PDF document text
    • http://problemconsulting.com/img/download/files/13911143452.pdfIn PDF document text
    • https://doluhosting.com/calisma2/files/uploads/vuneredaro.pdfIn PDF document text
    • https://poojaindiangrill.com/nbloom/fckuploads/file/jewexe.pdfIn PDF document text
    • http://ecohouse-lab.com/userfiles/file/29377015165.pdfIn PDF document text
    • https://pmrmhss.com/userfiles/file/fugekebenasujexubedelo.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613d3a0707949---vizozolozumij.pdfIn PDF document text
    • http://synagoge-stommeln.de/ckfinder/userfiles/files/94936932779.pdfIn PDF document text
    • http://webinaris.biz/ckfinder/userfiles/publics/files/jufixerutilovepopobepaf.pdfIn PDF document text
    • https://sibservis.com/ckfinder/userfiles/files/devinapozilitosusav.pdfIn PDF document text
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/rovixudi.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/luludarelusewuf.pdfIn PDF document text
    • http://geombiagioschettino.eu/userfiles/files/perexerokozowebupo.pdfIn PDF document text
    • http://needychild.org/ckfinder/userfiles/files/widiguf.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/72964969167.pdfIn PDF document text
    • https://kheops-so.fr/ckfinder/userfiles/files/83788060594.pdfIn PDF document text
    • https://nadrozmerne-sklo.cz/uploads/dejemesirigife.pdfIn PDF document text
    • http://trungtamsangloc.vn/uploads/ck_upload/files/22988593345.pdfIn PDF document text
    • http://mydreamtuscanwedding.com/editor_up/sirelofifirimikamosuvosu.pdfIn PDF document text
    • https://securitydm.eu/slicice/file/tesibaxodilokimenafi.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/a7f823c7db5354d546f3b8c5b9fc0323/97785149777.pdfIn PDF document text
    • http://risme.vn/files/52262007312.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=castle+of+illusion+mickey+mouse+apkPDF 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_off0000dc66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC66 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f47d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47D 10880 bytes
SHA-256: 71d03e0ff81af89ff0c63df9ab97a91f6008efa2bdc5809cd1f35875deaa8f90
font_02_sfnt_off00010db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB2 16984 bytes
SHA-256: 0c88fd802b0a16b30ed237cb3c285f2d02241b481c074f280da22163c6788b80

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