Malicious PDF — malware analysis report

Static analysis result for SHA-256 91f1bc5e19d91636…

MALICIOUS

PDF

72.0 KB Created: 2021-09-04 22:45:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e8056d6dbe5c7e349656f24f7fa3624d SHA-1: f6218a705d620beca2375445ab623ac7b8abdfb4 SHA-256: 91f1bc5e19d91636a4949f501f77de9eaf2a98c68e5de86c7692f3f7030f62a6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 malicious score 0.6693

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://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16125e6b222439---99194615396.pdf In PDF document text
    • http://ghalemdi.com/userfiles/file/gijadudineruwim.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16108f4aab0c06---kagarawewazaloxeg.pdfIn PDF document text
    • http://rauvuonsach.com/images/uploads/files/8902247848.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160fe472c1c185---wubavesanizinekalaredux.pdfIn PDF document text
    • https://www.aifimm.it/admin/inc/ckfinder/userfiles/files/legit.pdfIn PDF document text
    • http://bio-scan.com/userfiles/file/domipozalamuvugi.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/n84jagbn8kvuh1vt6f9l8e90t3/51930599313.pdfIn PDF document text
    • http://drukarnia-skawina.pl/app/webroot/media/files/wejosuketatur.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160987f195c605---fubixodamuvipujijujanow.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/16071b4cfc81f4---25440351970.pdfIn PDF document text
    • http://mysistermyfriendministries.org/clients/85776/File/melojomovefavexado.pdfIn PDF document text
    • http://urgentcarepb.net/userfiles/file/siviwudepadererab.pdfIn PDF document text
    • https://swiz.eu/files/editor/newoluk.pdfIn PDF document text
    • http://degeninhotel.ru/admin/ckfinder/userfiles/files/wobizova.pdfIn PDF document text
    • https://bustotoronto.com/userfiles/file/51842908570.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/f0aa3c71853dba55e338bbda4aee51a3/fisonekakulifizofo.pdfIn PDF document text
    • http://kclandscapes.com/ckfinder/triplebuserfiles/file/31662148854.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccc788e6844---dasovo.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/27354533643.pdfIn PDF document text
    • http://hotelborgodeipoeti.com/userfiles/files/sizig.pdfIn PDF document text
    • http://www.mostex.sk/files/articles/file/48491088090.pdfIn PDF document text
    • http://designpavelzapletal.cz/files/file/duxoxetaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=manual+turnitin+uvaPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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