Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c868ee276dde85b…

MALICIOUS

PDF

72.7 KB Created: 2021-09-30 18:15:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: e1c2dee9b89ee53dccae285f4a020715 SHA-1: 7f5d5924efdafbbe8ad9a2c3e792e621631df289 SHA-256: 0c868ee276dde85b2b21bf54d450cdab80de0602b72875f21079d85d9c435b29
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's designed to redirect users to potentially harmful websites. The presence of embedded URLs further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://crysiq.ru/uplcv?utm_term=unfair+mario+download+android PDF link annotation
    • http://thuaphatlailongthanh.vn/upload/contentFile/minhchau/file/kuzibesuwakotu.pdfIn PDF document text
    • http://tele-klass.ru/i/upload/files/20235598867.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161421252e8ca6---53535400105.pdfIn PDF document text
    • http://fli.edu.mn/ckfinder/userfiles/files/47802193815.pdfIn PDF document text
    • https://tims.ro/ckfinder/userfiles/files/5316533221.pdfIn PDF document text
    • https://groupekheidri.com/ckfinder/userfiles/files/31303260272.pdfIn PDF document text
    • http://mega-treid.com/userfiles/files/wajafewiwekekosiwexum.pdfIn PDF document text
    • http://jpiano.net/userData/ebizro_board/file/neburoweraputigojelevi.pdfIn PDF document text
    • http://tiwtactic.com/userfiles/files/95993244688.pdfIn PDF document text
    • https://perfecthospitals.org/FCKeditor/file/mowurisinokubafifabadit.pdfIn PDF document text
    • http://vdavloeren.be/userfiles/files/tigogenusuvanuxama.pdfIn PDF document text
    • http://xn--z92bzy85x.com/userData/board/file/kilasaworumi.pdfIn PDF document text
    • https://www.luthier-auxerre.fr/ckfinder/userfiles/files/sanok.pdfIn PDF document text
    • http://goldenstarhotel.vn/images/uploads/files/17263765732.pdfIn PDF document text
    • http://soldearenales.com/galeria/files/mevujufer.pdfIn PDF document text
    • https://resttour.com/images/userfiles/files/velaxibasibabekuzejeliko.pdfIn PDF document text
    • http://chono.mn/uploads/userfiles/files/pabameferogomovufevur.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///72207395946.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/161483e0d473bb---momurarobawudojakizixiw.pdfIn PDF document text
    • http://xlsferrosilicon.com/d/files/43999506017.pdfIn PDF document text
    • http://tech-in.info/bramy/userfiles/file/jazezavovezodi.pdfIn PDF document text
    • http://hoanggiaphatstone.com/upload/files/38929898598.pdfIn PDF document text
    • http://sofahatinh.com/upload/files/44472906358.pdfIn PDF document text
    • http://agavietnam.com/img/files/xezenoduto.pdfIn PDF document text
    • http://profil-metall.de/content/uploads/file/98637140290.pdfIn PDF document text
    • http://germainelecocq.it/userfiles/files/32255636971.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_off0000b63e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB63E 18720 bytes
SHA-256: a3fd54c10f7e50daf7125a7e2282b04ab80c5b80131d3d2ab26b1967442f8ade
font_01_sfnt_off0000e619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE619 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fe30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE30 10208 bytes
SHA-256: c3a4ba396133b4544b1291714a5494c0fe92cfffc21ddcb2c5ef43f3735ca8e6