Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbe7a53663ad6bd2…

MALICIOUS

PDF

81.6 KB Created: 2021-09-16 20:46:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: bf10f67a176c86cb67123e993860e9a9 SHA-1: 1c3dfc483e8b6d1a04d2d72b6be510555dcd49b0 SHA-256: bbe7a53663ad6bd2f26afe17eb3ebd0cb7ac6d9c2ecd92e3e9f5447770c11274
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high number of embedded links pointing to various domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://pixomot.ru/uplcv?utm_term=shot+guns+in+pubg PDF link annotation
    • https://dailyhondaotomientay.com/upload/files/59492189.pdfIn PDF document text
    • http://ucg-eg.com/userfiles/file/28880543083.pdfIn PDF document text
    • http://kayapalinakliyat.com/file/romozejugaki.pdfIn PDF document text
    • https://pharmawell.eu/ckfinder/userfiles/files/fakujexabajuzasesikozax.pdfIn PDF document text
    • https://zemtechnika.lt/public/site/0files/rusojeborifasokoletimuk.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/10f00b895c230394b51459bc6f2502c1/89859089864.pdfIn PDF document text
    • http://veterinariogiardinelli.it/userfiles/files/vorigix.pdfIn PDF document text
    • https://www.greenlakecruises.com/ckfinder/userfiles/files/5159244363.pdfIn PDF document text
    • http://blccy.com/userfiles/files/jinoniwusavexi.pdfIn PDF document text
    • http://emiem.pl/public/upload/ckfinder/userfiles/files/tegepodimegejup.pdfIn PDF document text
    • http://kuhomania.ru/ckfinder/userfiles/files/43251870522.pdfIn PDF document text
    • http://sun-green.be/ckfinder/userfiles/files/tutavux.pdfIn PDF document text
    • http://ecogestval.com/userfiles/file/wapolozukitalibegiguwutaz.pdfIn PDF document text
    • http://www.portaldasfreguesias.com/portugal/vianadocastelo/vianadocastelo/geraz_do_lima_sta_maria/ckeditor/ckfinder/file/66339806238.pdfIn PDF document text
    • http://szymonadamczyk.pl/uploads/fck/file/61063077640.pdfIn PDF document text
    • http://denetimmusavirlik.com/userfiles/file/simexokim.pdfIn PDF document text
    • http://oio.cn/uploadfiles/files/52670414339.pdfIn PDF document text
    • http://zhhyhb.com/uploadfiles/files/65677615103.pdfIn PDF document text
    • http://ciarajewellery.com/editor_upload/file/63571688844.pdfIn PDF document text
    • https://dolnoslaskialarmsmogowy.pl/imgturysta/files/rurizutinul.pdfIn PDF document text
    • http://drironcat.com/images/file/jegajijesate.pdfIn PDF document text
    • https://stmpallet.com/ckfinder/userfiles/files/86186451135.pdfIn PDF document text
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/24471005239.pdfIn PDF document text
    • https://shevtsov-art.com/uploads/files/fepijuzevajatekula.pdfIn PDF document text
    • https://nedimgame.com/calisma2/files/uploads/meludatapojolidifalep.pdfIn PDF document text
    • http://everintelconsulting.com/upload/file/202109161919448199.pdfIn PDF document text
    • http://af.ssla.ru/images/fornews/files/senuvolala.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_off0000dbcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCD 10404 bytes
SHA-256: c9f05df95e8bd7d1e3e4d1b8d42a4cbefbdea73f9c3c6f8f1ef77e0d4e6f6a34
font_01_sfnt_off0000f30a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30A 17592 bytes
SHA-256: 50463ae45ea2ed6451db362dfb763d2552e64a28d28c532a385df3d9e8f472ed
font_02_sfnt_off0001210d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1210D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1