Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbeffd95dfb16173…

MALICIOUS

PDF

64.0 KB Created: 2021-09-01 03:59:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7f190c42ceac038dd4a0005460f40ec9 SHA-1: e4cfb79c3c779fda9b9fbd749dda11fc58181ba0 SHA-256: bbeffd95dfb16173e52c403839fbcb7bc4a0ecf8670812a1e75f8bc009aa646f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute further malicious content or phish users. The presence of PDF-specific heuristics and the nature of the URLs strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9826

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://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/65010bfd8e98dcdba75ec75525304389/vorudumureriw.pdf In PDF document text
    • https://afra24.com/basefile/afra24/files/fuzediwopi.pdfIn PDF document text
    • http://careerdynamic.com/clients/3/3d/3d9dba0a3645e5854abf1db7654b9c86/File/40862009635.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba8ad91777f---24025304743.pdfIn PDF document text
    • http://fotocaroli.it/userfiles/files/90426916019.pdfIn PDF document text
    • https://diaspoassur.com/wp-content/plugins/super-forms/uploads/php/files/12f198a9a20d032cb258a2aeda54d713/65985366098.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb55baa144---21185368253.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a355c6d1dc4---jivewimazuwefupawa.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/1c2c2aqram81rsf2q2ql9qcil6/tuwejujezujokiwigufi.pdfIn PDF document text
    • https://www.bussmann-tiefbau.de/ckfinder/userfiles/files/22220888038.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/hn59diajodpa3gb2qu8lb7r5d6/regevisiveronogiwisudok.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/307271ab9d6d3229697d6584f945dc5a/kutufosazuzomuxom.pdfIn PDF document text
    • http://giasudaihocsupham.com/Images_upload/files/71866224346.pdfIn PDF document text
    • http://byty-pardubice.eu/UserFiles/File/tumupigikudowize.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/44400278656.pdfIn PDF document text
    • http://phyllisrubensteinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sumedojosuxupotazalebut.pdfIn PDF document text
    • http://londonjip.com/userData/board/file/58948794048.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160993bc0102eb---19165524587.pdfIn PDF document text
    • http://cga82.com/admin/File/59607254963.pdfIn PDF document text
    • http://schturman.ru/files/files/98027191303.pdfIn PDF document text
    • https://olympicwroclaw.pl/zdjecia/fck/file/65803797024.pdfIn PDF document text
    • https://yz-yongzhong.com/upfiles/editor/files/gesofetasalike.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=jac+2019+10th+resultPDF 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_off0000d289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD289 19612 bytes
SHA-256: 569d41b44772656938c232af3e5b29a879fb432a180431ab5d51a63e2383482c

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