Malicious PDF — malware analysis report

Static analysis result for SHA-256 fde5c93b8a211059…

MALICIOUS

PDF

61.4 KB Created: 2021-10-07 16:26:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 7d7886f81369d33fde70159758118e1e SHA-1: d3c066a6c0454d131d90964f7224e689eb3044b8 SHA-256: fde5c93b8a2110594561309a0fcfa30122cbe5114182f5c5ec7a6ddb58600d22
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS uploads, indicating a link farm designed to redirect users. The presence of 'utm_term' parameters suggests tracking for phishing or malicious campaigns. ClamAV detection and ML classification confirm the malicious nature of the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8041

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://drafthe.ru/uplcv?utm_term=woods+50001+timer+instructions PDF link annotation
    • http://ktcz.eu/files/files/74040975205.pdfIn PDF document text
    • https://stehovani-ostrava.cz/static_pages_files/file/rutus.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/lowidamasavebalafifi.pdfIn PDF document text
    • https://media-get.ru/userfiles/files/xipenesadilitebowamasu.pdfIn PDF document text
    • http://mobil-tech.com/files/daxog.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1615575bd93ebb---fesuvufuxol.pdfIn PDF document text
    • https://butyfarm.mm520.net/userfiles/files/11874501967.pdfIn PDF document text
    • http://www.first-classlogistics.com/image/upload/File/44128007382.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021093020001335.pdfIn PDF document text
    • http://alocainghien.com/uploads/userfiles/file/vefapimukosezalapewajela.pdfIn PDF document text
    • https://motodubai.com/uploaded_images/files/8784949244.pdfIn PDF document text
    • http://dokumsuzgec.com/userfiles/files/kakanemakido.pdfIn PDF document text
    • http://thuocamakong.net/userfiles/image/file/52353076356.pdfIn PDF document text
    • http://ylpcl.com/ckfinder/userfiles/files/lixesolewixanaruluz.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613343ae3dea3---fusevosejaxip.pdfIn PDF document text
    • https://narellesastro.com/userfiles/files/71674327267.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/fae6d52fe8c565c2e37b5c68e79aefc5/gonumosujil.pdfIn PDF document text
    • http://movietek.vn/hinh-anh/files/50405716484.pdfIn PDF document text
    • https://misbahelmudii.org/ckfinder/userfiles/files/46515479888.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/f7eae9b0235f0288efd719db4e19a18f/77401519376.pdfIn PDF document text
    • http://enricobarraco.com/files/nakexonizosi.pdfIn PDF document text
    • http://avesta-hmora.boj.se/uploads/userfiles/files/belameko.pdfIn PDF document text
    • http://hotelrealerimini.it/userfiles/files/vegawofojogufut.pdfIn PDF document text
    • http://osoboebludo.com/ckfinder/userfiles/files/33947824982.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_off0000c8e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8E2 18120 bytes
SHA-256: 60c9a090e80002069ecb1f6db3474e04ba18d4db8b480dc7fb13bee563afb5de

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