Malicious PDF — malware analysis report

Static analysis result for SHA-256 19cbcc980d36b131…

MALICIOUS

PDF

123.5 KB Created: 2021-08-06 12:25:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b436a77f4d45aa85797cb585092181c8 SHA-1: 91c57182854901f9783c7a332adf7a5e5841aded SHA-256: 19cbcc980d36b1312aae61308d124b7ad3c78d824d04b83b04ecfc3040c4c984
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous links pointing to compromised WordPress upload directories, indicating a link farm designed to host malicious content. ClamAV detected this file as Pdf.Phishing.Trojan, further supporting its malicious nature. The embedded links suggest an attempt to redirect users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3958

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160b3a2d3b1b5c---71268494200.pdf In PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d742a8c80d---giguwebakilegiwov.pdfIn PDF document text
    • https://valubil.com/public/uploads/cms_file/cms_files/pewamaxasejagawa.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/2b205f9f773f2bf436edd6709d273e78/feguna.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/75ea41f9b6c8786f304b4fad6b124302/45130618102.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/bige3uo225l7bbvamke3sgj8om/62464224534.pdfIn PDF document text
    • http://auksozvynas.lt/userfiles/file/60843834582.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608238b6ca454---66708550336.pdfIn PDF document text
    • https://hrmconsulting.biz/upload/files/59861146773.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbf9a16a04---gotigun.pdfIn PDF document text
    • http://gewoongroen.eu/app/webroot/files/userfiles/files/luwedatixijigusovuga.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/16070154c243d8---62408804956.pdfIn PDF document text
    • http://innospectrum.eu/hirlevel/file/4927714415.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2670be3b2---2505582832.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/v661dct57uggovuro2k7amcdra/bagowawam.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/64987293443.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/38e5a047d06d2e660776c535908d40c0/3060100437.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/kotalazekirizepubam.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/fecf56a605ec2b16632e6bcdcf936f37/53504730704.pdfIn PDF document text
    • http://computer-rudolstadt.de/upload/file/beregofujawugolep.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3f70896ade---61581524815.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/p63i502a2nkh17uqemhd5glofs/87334077023.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=what+is+meant+by+first+angle+and+third+angle+projectionPDF link annotation
    • 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_off00017cb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17CB9 21396 bytes
SHA-256: 87ef7374c1b46df2b21713cad982ec48baa6e553cdfd72db324adeb3b8d64bbf
font_01_sfnt_off0001b676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B676 16280 bytes
SHA-256: e2261041576f8723b898fd1be77834218bb2681e1f864527dd57a680cd77f124
font_02_sfnt_off0001cc86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CC86 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1