Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bbb17374925de04…

MALICIOUS

PDF

83.1 KB Created: 2021-06-26 00:07:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 8f49445c8f7442f36907a37a9a4c64e7 SHA-1: 79025dee78aad89f039df6fa173c5846dd863d01 SHA-256: 9bbb17374925de04a842e456c4e21517d863a640d534c4fe7483248b6478456f
124 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs that point to compromised WordPress sites and other disposable hosting. The ClamAV detection indicates it is a phishing trojan, and the link farm structure suggests it is designed to lure users to malicious content. The file's purpose is to redirect users to external sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4803

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
  • 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
  • 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://nomylo.ru/uplcv?utm_term=itil+questions+and+answers+mcq+tcs PDF link annotation
    • https://pet-fashion.ro/mm/file/xolidugovajowatajep.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/ba9a05850ff40779de6185e8529e18fa/xodakupu.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16070111279482---555352206.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d710f308a3---mowed.pdfIn PDF document text
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/046980dec95d4923ecadd355f534ee25/sutefobijo.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/bagumiwenuzekunazu.pdfIn PDF document text
    • http://duonglaohanoi.com/userfiles/file/bifokanatobavej.pdfIn PDF document text
    • https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/57bf03796cbe44323cae6835824807dd/gomamimonajopanukiduf.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/f3e00c038ee0db1ca357b510de01d85d/nojapawukiguvefubadifoz.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cde80a5834---ladafonibidutudixusomiju.pdfIn PDF document text
    • https://bahia-group.com/ckfinder/userfiles/files/vegunuwan.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16081672b1ab73---sepesesatisuwabakisu.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16073777e2f38b---pijitemotawuto.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccb6681ce32---jututuni.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/de80b4a1e572c9abefcc1a83498a1894/21818167704.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/lf1j30icvdi6vstpfq1dgtkofa/xorazuduxam.pdfIn PDF document text
    • http://shsclassof1959.com/clients/a/a7/a7a82b2a6025f7fafce5d77be70bf845/File/roxededom.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fee8d429b3---revitalosipaxarov.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/10fa93c702ce343880f18833c4864363/mudazawarexu.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021060421310349.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086cceb9b85e---32598939286.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/770efaa91f2abbc4f3e63ebbe806d68b/medaxoremizej.pdfIn PDF document text
    • 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_off0000fe6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6B 10816 bytes
SHA-256: 416983650e1c714563f58732aad6bf6f522d5ca3ab9b2f021baeaf3240371314
font_01_sfnt_off0001172e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1172E 17092 bytes
SHA-256: 36977edf8a809310f24bcca0bbb0184bc40caa13ae19a84c993520d196fe11d0