Malicious PDF — malware analysis report

Static analysis result for SHA-256 47d83463cd5b300e…

MALICIOUS

PDF

80.5 KB Created: 2021-09-18 10:02:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 731c30c0030531e2830d4353c5523408 SHA-1: b0863724600ae4770da80c1c8b5ba6f0b83ba3ab SHA-256: 47d83463cd5b300e4c99c4607b596a5ac8b4d83b5a55738dbe522d3b498feb8b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It functions as a link farm, containing numerous embedded URLs pointing to external sites, many of which are hosted on disposable domains. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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.
  • 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://giriconsultancy.com/content_files/files/53017952472.pdf In PDF document text
    • https://chilegastronomia.cl/uploads/userfiles/files/gogup.pdfIn PDF document text
    • http://unicaconsultoriarh.com/images/files/fedojowed.pdfIn PDF document text
    • http://bigyikesmedia.com/home/xtremweb/public_html/consultinstitute/web/upload/files/tufatenegowatifukuniwad.pdfIn PDF document text
    • http://jiab.net/userData/board/file/9947345818.pdfIn PDF document text
    • http://orem.mn/uploads/files/midinamam.pdfIn PDF document text
    • http://kfnmsz.com/upfolder/e/files/20210909140234.pdfIn PDF document text
    • http://luijkzonwering.nl/image/file/90958145540.pdfIn PDF document text
    • http://80tner.netsociality.com/upload/files/mojutudopuf.pdfIn PDF document text
    • https://myclubowners.com/userfiles/files/pisanewap.pdfIn PDF document text
    • http://www.fashiongale.ro/userfiles/files/xexomezoke.pdfIn PDF document text
    • http://fotocaroli.it/userfiles/files/75478278606.pdfIn PDF document text
    • http://usefchina.com/uploadfile/file///2021091518304348.pdfIn PDF document text
    • http://www.oneworldkarate.com/fckeditorimages/userfiles/file/93500615213.pdfIn PDF document text
    • http://cabini.it/userfiles/files/damobodeseji.pdfIn PDF document text
    • https://sunkamalzemecilik.com/userfiles/file/gijubo.pdfIn PDF document text
    • http://capitaldanceacademy.com/userfiles/files/minixedotikevitizeraves.pdfIn PDF document text
    • http://domusanna.it/userfiles/files/24369299012.pdfIn PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/rigon.pdfIn PDF document text
    • https://prolocolidodisavio.org/ckfinder/userfiles/files/sawaxofoxuwidon.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161330c36846ec---womevanane.pdfIn PDF document text
    • http://twilaw.com/files/files/2322755133.pdfIn PDF document text
    • https://igescanada.com/ckfinder/userfiles/files/zivusafut.pdfIn PDF document text
    • http://styrexon.cz/userfiles/file/28218167537.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=choices+stories+you+play+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_off0000d1ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e9c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C2 10704 bytes
SHA-256: c3cba86f2e5614c3d4a683a682563a5f785e09f60b589340a4a925e0d19267be
font_02_sfnt_off0001028c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028C 19252 bytes
SHA-256: 658bb23b9943cc0dea868b314b44e8f45ea16f1d66701faf4a0aa2a58c34cc1c

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