Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba5621a9d8e8df80…

MALICIOUS

PDF

60.9 KB Created: 2021-09-18 23:59:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d568e6d9ae97bb2e762822840087e2f2 SHA-1: 5322f581352a8cfc71da82f50f4804275667bcea SHA-256: ba5621a9d8e8df803d63476674f79d1f072aee9ff37c3b2f718f3b6a6359a9c1
154 Risk Score

Malware Insights

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

The PDF file contains a link farm that directs users to multiple PDF documents hosted on various domains, some of which are identified as compromised or disposable. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification further supports its malicious nature. The primary goal appears to be directing users to external, potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7488

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 http://dieterheich.de/images/uploads/file/dawelesunogafesutarogup.pdf In PDF document text
    • http://omni-links.com/images/blog/file/84492093010.pdfIn PDF document text
    • http://shijijiaming.cn/filespath/files/20210904215412.pdfIn PDF document text
    • https://giriconsultancy.com/content_files/files/faloz.pdfIn PDF document text
    • https://kovtec.pl/eurostyl/photos/file/28726312608.pdfIn PDF document text
    • http://bearings-home.com/userfiles/file/mewotodej.pdfIn PDF document text
    • http://avandcie-energy.com/ckfinder/userfiles/files/49144792096.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161427a40acd06---62869044020.pdfIn PDF document text
    • http://carbonelite.ru/file/kafoxixuruzaxuwapivadoz.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/vodekofixesegawon.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/4b82a6ae2c282ea7af95e9687c1b9cb1/2920671329.pdfIn PDF document text
    • http://makesomenoise.hu/upload/file/20379119801.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/23d6966bdc539ffee9f0f4c5671799dd/34936075679.pdfIn PDF document text
    • http://euromarkcreations.com/new/fck_img/file/33750563409.pdfIn PDF document text
    • https://copacndg.com/images/uploads/files/84932876474.pdfIn PDF document text
    • https://afra24.com/basefile/afra24/files/vewavuvekonan.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16138d0b206f6f---7523620477.pdfIn PDF document text
    • http://xn----1-6cdapb2bdyqawnpcindqfc.xn--p1ai/media/file/61120462183.pdfIn PDF document text
    • https://aordonez.com/images/contenidos/files/23303776893.pdfIn PDF document text
    • https://orsam.org.tr/paketler/ckfinder/dosyalar/files/lowiwit.pdfIn PDF document text
    • https://whitepalacegrill.com/userfiles/23513779626.pdfIn PDF document text
    • https://kanat.com/upload/ckfinder/files/tedilukajibemakibaved.pdfIn PDF document text
    • http://robvancampen.nl/userfiles/file/48755760651.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/0e23j3284pqhu15n0dm1ttk9n3/28052871116.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=gta+v+beta+version+by+techno+gamerzPDF 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_off0000c79c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC79C 19268 bytes
SHA-256: 71866e0402ffcd62621aad968f10135473446f0e45ce933836ad436b87ff6f15

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