Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa40b30baf64993b…

MALICIOUS

PDF

78.4 KB Created: 2021-09-22 09:12:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 824e05594b905b21c23419c18160b2d3 SHA-1: 6a84fb81aaa535a1272a7a95b54854525292b979 SHA-256: fa40b30baf64993b6a23fa479059d4f98a02c84e8aee055d6cb0b5dd6cc7653b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to other PDF files hosted on various domains, many of which appear to be compromised WordPress sites. This structure suggests a link farm designed to lead users to malicious content, likely for phishing or malware delivery. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6208

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://catamma.ru/uplcv?utm_term=the+second+largest+country PDF link annotation
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e487b69482---51653970244.pdfIn PDF document text
    • http://thietkewebbacninh.com/webroot/img/files/99690977359.pdfIn PDF document text
    • http://tencanpowder.com/d/files/59052758231.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/tk0rrfio0fablj2vrdb8901qo4/21191919057.pdfIn PDF document text
    • http://edituj.cz/res/file/57187996510.pdfIn PDF document text
    • http://xn--hazrdner-r4a10d.com/alisveris/yollanan_resimler/file/fujiduluxesaximoleju.pdfIn PDF document text
    • https://onderdurdu.com/upload/ckfinder/files/nuwiveruzam.pdfIn PDF document text
    • http://krzysztofmalec.pl/gfx/fck/file/xasek.pdfIn PDF document text
    • https://hoavily.com/uploads/files/97980422571.pdfIn PDF document text
    • http://suspensionestg.mx/userfiles/file/55821741616.pdfIn PDF document text
    • http://rszm88.com/upfolder/e/files/20210911162422.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/ad837dc0fca0214884efc09a2fb0b8ee/fotegowadibeja.pdfIn PDF document text
    • https://coopinproject.eu/ckfinder/userfiles/files/gedes.pdfIn PDF document text
    • http://mrpennarak.com/user_file/file/3606937130.pdfIn PDF document text
    • https://nbtele.com/en/cache/fck_files/file/13843304898.pdfIn PDF document text
    • http://www.ville-dammarie.com/ckfinder/userfiles/files/levogefuwajozumimu.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/fejuzadaxoliwe.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/n2umfsb3gctisdkpg507kpvi64/wexaguxarun.pdfIn PDF document text
    • https://rafaellopezehijo.com/upload/files/14869973036.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/4hhqjpcel75gesoj6buj08d9gh/6640654335.pdfIn PDF document text
    • https://mehreganimaging.ir/images/upload/files/delakipuneraruzugavoboj.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/c95b8375032de9ca745c46c513c554f7/27113650846.pdfIn PDF document text
    • https://giorgiosantinelli.it/file/zisenajavuweni.pdfIn PDF document text
    • http://minhtoangalaxyhotel.vn/app/webroot/files/ckfinder/files/44555497749.pdfIn PDF document text
    • 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_off000118af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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