Malicious PDF — malware analysis report

Static analysis result for SHA-256 549724d8c2402cb0…

MALICIOUS

PDF

79.0 KB Created: 2021-08-15 22:41:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4a72761d594880c60018c7c91618211b SHA-1: 9469f1706fafa9ce303e2963f088e038224ee18e SHA-256: 549724d8c2402cb0ae635468e9ad022735dee712c521da54509507caea7588b8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file contains numerous links, many of which point to compromised WordPress sites and other disposable hosting domains, indicating a link farm designed to redirect users to malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The ML classifier also flagged this PDF with a high probability of being malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5756

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 https://ldcpc.com/ckfinder/userfiles/files/57902541676.pdf In PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/457412a7b7cac6563b22975563120bcf/zejimegeninotubewasejiz.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/bipupajafofudobibiguxise.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160c7549fbcd45---99695754863.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b0cee158a9---gebilagolafo.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/5f00d636ce3b56892c756a32849c1223/68772158370.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/456df8c762438d092bff0ebd9e18b450/rolulazimusuwovob.pdfIn PDF document text
    • https://www.webplease.it/wp-content/plugins/super-forms/uploads/php/files/3jt0039upcdsm8tcpn0usp0qu9/47473582415.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/nivinixugojuxobimeman.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/govagapivuzidubexopugafab.pdfIn PDF document text
    • http://sadex.pl/fck/file/kaxejoxojume.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/2kfjjoh50dbejahiolb6mp70e7/zovedametemugonopigagawid.pdfIn PDF document text
    • https://melz-feu.ru/upload/86239128098.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf18f5b190---31588103758.pdfIn PDF document text
    • https://prokoncept.hu/admin/blogfck/image/file/rujaxebalejapolevorixid.pdfIn PDF document text
    • http://trungtinjsc.vn/upload/FCK/file/78755057719.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/861f7d8c2d64fdd71e36e796bd3f05b9/zazurovidowajekijikir.pdfIn PDF document text
    • https://kitapkapla.com/upload/ckfinder/files/4867035232.pdfIn PDF document text
    • http://oxigensupplies.com/shipinc/userfiles/files/92885446390.pdfIn PDF document text
    • https://digireg.cn/upload/bixam.pdfIn PDF document text
    • http://enjoyisagenix.com/ckfinder/userfiles/files/bafidet.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160863ea23309e---23169961526.pdfIn PDF document text
    • http://vivatbacchus.hu/files/file/97015873979.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/3fbef30fc99fb6c6a3a5c58a8aa85018/51282690402.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/125e1f260532080b924401c9198a74f6/kafedopo.pdfIn PDF document text
    • http://chataphan.com/file_media/file_image/file/totapotifuminimexegu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=examenes+ciencias+naturales+3+primaria+anayaPDF 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_off000104d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D0 18768 bytes
SHA-256: 7317c4831e79cbc54317cbe5bd88a6324d081df1f1a79542ef85bd818cad81e2