Malicious PDF — malware analysis report

Static analysis result for SHA-256 cff84f76c1af3f0b…

MALICIOUS

PDF

204.4 KB Created: 2021-08-19 21:47:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-24
MD5: 88f407e110835a1acf55d987c26c4320 SHA-1: 7b0aeb628a8fca6bfe3b6927c449f0552409184c SHA-256: cff84f76c1af3f0b71d8579bbe90d602cc5273225625fc1beec7e1b692871e8c
94 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3760

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/80hc24bvm12easj2ncfa96n01q/46800262302.pdf In PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d35b66f6ed---wanusiviluridavevakot.pdfIn PDF document text
    • https://eviinstall.com/userfiles/files/76262221943.pdfIn PDF document text
    • http://mebelhotel.ru/userfiles/files/zowofilexebufalonizasusap.pdfIn PDF document text
    • http://yishiweb.com/upfiles/files/20210614_063648.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/tuwazalulifulof.pdfIn PDF document text
    • https://www.temsilcifirsatlari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084309449899---tubejojex.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c87efdef15b---sametiguguzid.pdfIn PDF document text
    • http://muszempilla.com/files/file/54639585992.pdfIn PDF document text
    • http://metrokentakifinan.com/resimler/files/34547769504.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094144c65b38---famiwuvitine.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/bowavurarirorafuxux.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/f722276cf7d225f50caff5ac4f3e0ca5/risaj.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/5nrll2mag912lg7me6g79fru75/56198444725.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/55938092221.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1611c4b7e0e09d---tuvokawazatud.pdfIn PDF document text
    • http://wecans.net/_UploadFile/Images/file/jokasosubomilepegexopog.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16078c31546a64---65109498232.pdfIn PDF document text
    • http://suapaiatuipelehakefamily.com/clients/80707/File/kakijikig.pdfIn PDF document text
    • http://yao-cheng.com/uploadfiles/20210715190843.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1609981693f2e4---59000843780.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6kmtcm0v1gjhf3o35kdcf1etq1/28638829691.pdfIn PDF document text
    • https://briljant-maleri.se/UserFiles/files/20514462330.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=cuentos+cortos+para+adolescentes+de+misterioPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002df25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DF25 20132 bytes
SHA-256: dafc5603023d3510ede13ec774b116620959d259b1219f5a6490ce219febb6ab
font_01_sfnt_off0003118b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3118B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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