Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2564e67e8ee00d2…

MALICIOUS

PDF

79.3 KB Created: 2021-09-11 15:17:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 94b5d33b89b1de3d908f15bf7b0c67e3 SHA-1: bf00b55c6c856595b8133f600842dfe40b538c84 SHA-256: d2564e67e8ee00d2f6d2c214bf507b8af8040467d8ae42c1dfd454928b1e85e0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it functions as a link farm, directing users to various potentially compromised or malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attack pattern involving redirection to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://taociren.com/upload/file/210911105713445377jrd7ibsc3n12.pdf In PDF document text
    • https://mirrorlink.com/public/files/files/sorezuvitezidurunosukeluz.pdfIn PDF document text
    • http://ofitecnic.es/files.ofitecnic/fck_up/file/vetajetebivalonofawugisa.pdfIn PDF document text
    • https://fsreloading.com/userfiles/files/57312677099.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613935503f69c---77655688892.pdfIn PDF document text
    • http://tylincms.com/userfiles/files/vipojerunojur.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/d100ef1a35200f8e703303c6e57872bb/bulikipikowalidise.pdfIn PDF document text
    • http://louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/71492251583.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/lozono.pdfIn PDF document text
    • http://miroslaws.com/ckfinder/userfiles/files/janejobinixeneninoxuk.pdfIn PDF document text
    • http://fitviewer.com/files/file/57811129091.pdfIn PDF document text
    • http://cateringkieuan.com/uploads/userfiles/file/funubipujugojunas.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/np53iaceitpr3k96209pc9gk3p/tolominerurowimilelilegiz.pdfIn PDF document text
    • https://autopsrus.com/ckfinder/userfiles/files/69766120365.pdfIn PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/90922847237.pdfIn PDF document text
    • http://colegiosantarosa.com/uploads/imagem/file/rafulekunofobupe.pdfIn PDF document text
    • https://infrastone.com/userfiles/files/bavalilulu.pdfIn PDF document text
    • https://resttour.com/images/userfiles/files/6963278860.pdfIn PDF document text
    • http://jwconsult2005.com/file_media/file_image/file/tixurepotorerabuwuwab.pdfIn PDF document text
    • https://vinaarc.com/app/webroot/files/ckfinder/userfiles/files/68883027903.pdfIn PDF document text
    • http://lynxitservices.com/ckfinder/userfiles/files/bakunipekawerufamu.pdfIn PDF document text
    • http://shtaket46.ru/page_edit/_samples/userfiles/files/40697921527.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/161385c6ae7548---28289175160.pdfIn PDF document text
    • https://ville-saintleonard.fr/pdf/jukamorowotilinupuvi.pdfIn PDF document text
    • https://jamisonfurnace.ca/userfiles/files/73963636592.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=dragonlance+campaign+setting+pdf+freePDF 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_off0000d0eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0EB 17480 bytes
SHA-256: 1013284ec7d9cd0784e49ccd1d81a38c439f52e379608e1c9369071620f988ba
font_01_sfnt_off0000fe84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE84 10964 bytes
SHA-256: 7d4695379dd3d7877dd50d452bc56b71ca2a78806547b37efe68b12c786b031b
font_02_sfnt_off000117b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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