Malicious PDF — malware analysis report

Static analysis result for SHA-256 d05054e5e9394a5b…

MALICIOUS

PDF

74.6 KB Created: 2021-09-22 15:16:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8978087e80ecfa63c9e2326d5a6dc156 SHA-1: 95b75439b6c1ca018e5cc6301fea8348cad824f9 SHA-256: d05054e5e9394a5b69195095404346a1d1ada2e22c80a331dbc6f8ec2b32d637
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a malicious payload. No scripts were extracted, but the URL structure and heuristic firings are sufficient to infer a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9939

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 https://pixomot.ru/uplcv?utm_term=download+beast+quest+mod+apk PDF link annotation
    • http://christopherdallo.com/file/lupupivatexixugobatir.pdfIn PDF document text
    • http://laulumaja.fi/ckfinder/userfiles/files/binebibukikabodebigew.pdfIn PDF document text
    • https://willes-gb.com/uploads/files/202109041124372096.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/pujujorapudavevifivisekox.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/5eec57a26b83e9b3cb0002c1e200d381/jizitigobinenizafada.pdfIn PDF document text
    • http://kencert.vn/uploads/image/files/zoripufabajazatezawobuf.pdfIn PDF document text
    • https://10s317.com/uploads/files/202109121826087822.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161416a2f252b8---12054558916.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16137e483ed4dc---28380271328.pdfIn PDF document text
    • http://burattinojatek.hu/userfiles/file/niborivalavenanasig.pdfIn PDF document text
    • http://greenworx.eu/images/uploads/files/dejewoki.pdfIn PDF document text
    • https://radekslodkiewicz.pl/files/file/9785258791.pdfIn PDF document text
    • https://pleasanton.com/wysiwygfiles/file/volitewon.pdfIn PDF document text
    • https://sydneystudytour.com/accounting/userfiles/file/xaxofoxadumugemapijive.pdfIn PDF document text
    • http://energy-labels.com/userfiles/file/54565604521.pdfIn PDF document text
    • http://gachmenminhchien.com/media/ftp/file/savuz.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/161335aab71ee4---35417120394.pdfIn PDF document text
    • https://eastoncn.housemember.com/uploads/files/kefuloridozasi.pdfIn PDF document text
    • https://cheesykeju.com/contents/files/78284732680.pdfIn PDF document text
    • https://ourlady-schools2.com/userfiles/files/69151295302.pdfIn PDF document text
    • http://lngpetro.com/userfiles/file/mavupemixerabu.pdfIn PDF document text
    • https://afra24.com/basefile/afra24/files/39813648941.pdfIn PDF document text
    • https://vanrun-it.nl/userfiles/files/zaginubuvofowameledasapiz.pdfIn PDF document text
    • http://integrotech.com/zdjecia/file/60804422885.pdfIn PDF document text
    • http://jongauger.com/ckfinder/userfiles/files/mibane.pdfIn PDF document text
    • http://labellebeaute.com.hk/ckfinder/userfiles/files/tasesoweta.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_off0000bc80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD497 10928 bytes
SHA-256: 58970d40b57c10120b8f30510ff892473a439c77570302fb2bd651482d9e9c22
font_02_sfnt_off0000ed88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED88 18408 bytes
SHA-256: d6ca2286951c1c33bad214da82693861e8f4c6d9f3f57a57afa300d933bee4ca