Malicious PDF — malware analysis report

Static analysis result for SHA-256 19563028653afff4…

MALICIOUS

PDF

82.4 KB Created: 2021-09-07 05:19:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6979953966bcd6602682a4e4ccf9080d SHA-1: de2188f0b6f2cb052f4e5ca89a5a3c5dae82bed9 SHA-256: 19563028653afff47f304b36f2bf0536e1ab062ab995185cf40d88dd0273017b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, suggesting an attempt to distribute malicious content or redirect users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary attack pattern involves using the PDF as a link farm to lure users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://www.odnpoznan.pl/fotki/file/file/38691978320.pdf In PDF document text
    • http://prestizhstroycompany.ru/SITE/files/editor/file/1781595520.pdfIn PDF document text
    • https://bearings.vn/images/ckeditor/files/73175105618.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2ad5d3727---9045483102.pdfIn PDF document text
    • http://toyotarent.hk/FileData/ckfinder/files/20210810_616823949187BCC0.pdfIn PDF document text
    • http://tareeapartment.com/user_img/files/welaxivunajunitizotofaz.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c7a21871b06---dumisafedijufituk.pdfIn PDF document text
    • http://basumati.com/app/webroot/ckfinder/userfiles/files/57953885788.pdfIn PDF document text
    • https://pankajplast.com/ckfinder/userfiles/files/sifemabora.pdfIn PDF document text
    • http://purepoem.com/resource/docContentImg/file/2021-08-05/7414d795c5a75c980d882a9f79d55ef9.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160e64d9e0040b---bilene.pdfIn PDF document text
    • http://cadelupo.it/userfiles/files/99951402936.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/begitawoxanivalixikos.pdfIn PDF document text
    • https://tenfci.org/userfiles/file/zajalajanak.pdfIn PDF document text
    • https://kultmotor.hu/images/files/vifememufigu.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/aurf0o7chlu846btk803dneqqk/98621353610.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/161307b4b1852a---70461662199.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/9404d3f3a106e93e0e126e7a1b687dab/geribufibidonudut.pdfIn PDF document text
    • https://dolnoslaskialarmsmogowy.pl/imgturysta/files/99174569817.pdfIn PDF document text
    • http://thaiboxes.com/piceditor/file/89987140082.pdfIn PDF document text
    • http://bachova-terapia.sk/images/file/24243510143.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/m2fadlrropv5pm0nd4pl1dvh86/90435411694.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/kk3m3e6mgo2l0novpt8arhe4l7/lonezalanebib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=paradox+vs+oxymoron+worksheetPDF 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_off0000dd63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD63 18004 bytes
SHA-256: da091b6c9723ab30ee31a179149f038e37bf94285aa753589e8e866522394227
font_01_sfnt_off00010af2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF2 10836 bytes
SHA-256: e4407fe58d85d0d43d3f6083894a6bfbad3f4237afc70a0cbf9cf18e43f09831
font_02_sfnt_off000123e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.