Malicious PDF — malware analysis report

Static analysis result for SHA-256 087904a0d2762089…

MALICIOUS

PDF

73.0 KB Created: 2021-07-20 20:35:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0141e39a03990944f3708719c1e114f8 SHA-1: ea47f2bed5d282856c4e674dc3c9764153e7f114 SHA-256: 087904a0d276208967ff06af35f3fc32fb81ff05be91ee6dfc55564301c10c0c
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories and disposable hosting domains, indicating a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier further support its malicious nature, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6220

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://hoctienganh123.net/upload/files/vevebo.pdf In PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/77fnthkr5567a210avirqps20q/22558196975.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/l6gee2rn3paha0nvfjavg69kt4/44934640296.pdfIn PDF document text
    • http://vandientuchinhhang.com/upload/files/47930806932.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/bcf2f14293fb3f8f5e9c60f05e7cea8b/51692657394.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160993067d7756---wexaratowazedisipalim.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b62ee47cea---50370503926.pdfIn PDF document text
    • http://aydinservis.com/ckfinder/userfiles/files/36897959030.pdfIn PDF document text
    • http://fantalife.nl/userfiles/file/68059957997.pdfIn PDF document text
    • https://toskov-yordanov.com/userfiles/file/24045508022.pdfIn PDF document text
    • http://trans-serwis.com/userfiles/file/fejoxivosi.pdfIn PDF document text
    • http://taxicityplus.ru/userfiles/file/wijopitokuwu.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/88290409867.pdfIn PDF document text
    • http://bannails.com/fckeditor_userfiles/file/gewumabovevapepewuwi.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/f16e0304475d7602756fcf56afcebe38/30487944402.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bdf06c7eebc---vewiraletifaf.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/sivbcvlbs856du2dugm29tg0l0/87942787471.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb9b6e41f29---92249036846.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/gamutelavuto.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160702e498458a---71504226804.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/1d0a039f234078b437958f8c506f6928/kuxezarafuselepanirewuda.pdfIn PDF document text
    • http://branonperformance.com/ckfinder/userfiles/files/2840165772.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/940eb9231cd57f5a6ed6df4a3ae9b07d/97990070990.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=employment+contract+malaysia+pdfPDF 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_off00010406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10406 10880 bytes
SHA-256: c49b3ea2e8a2f274cd5a2b7fb3192b0bd76792bee76128155e381c41e9ff1048

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