Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc088830034ea12b…

MALICIOUS

PDF

88.7 KB Created: 2021-07-25 19:43:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 38b395268d9917e7fb0010a05136a9c2 SHA-1: e699d26851fa347f92b63e96b7359e63a3d5b1ea SHA-256: cc088830034ea12bfb0905f75b42b7697e227e3cb7400948b89044541cb3a694
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document flagged by ClamAV and an ML classifier as malicious. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm or phishing lure. The presence of PDF_URI and EMBEDDED_URL heuristics indicates the document attempts to redirect users to external content, likely to download further payloads or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9266

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://www.vikingmaterials.com/img/48621775481.pdf In PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160825b1120e0b---98834664523.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf769ddf75---kenebepaliv.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/ketovuzarinozimamago.pdfIn PDF document text
    • http://blueyee.com/upload/file/15134325897.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/f16231b003cc6bbc1e41054a03fab566/vafogopopazebige.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160892e45d6521---kovaxekusabekepim.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1abfd97d1---vapabawe.pdfIn PDF document text
    • http://scottsdalehighbeavers1978.com/clients/80197/File/mulam.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/gemub.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/2518285819.pdfIn PDF document text
    • https://leosservices.com/userfiles/file/zotokejij.pdfIn PDF document text
    • http://tetraeng.it/userfiles/files/16028572912.pdfIn PDF document text
    • https://jamisonfurnace.ca/userfiles/files/sifizonagatusuguwarudib.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/c215cf454a8d7092de85fc1088f7fad9/37780411818.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/32f961fda9aafcdaca2d5ab79bec5057/kilemivijumogivapu.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609dd6d3b842e---24011973743.pdfIn PDF document text
    • http://frezerovka.by/images/fxeditor/file/pipamebatizopepefinuzin.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/ugbf2ps6003g5cipu2mb0a8d01/19991237792.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/2a59de1c7ca953eb13704c92951f029a/75466431963.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/dc7cf41a7a772f2e62d3d768fb3565eb/rotugukani.pdfIn PDF document text
    • http://bearings-home.com/userfiles/file/59995641081.pdfIn PDF document text
    • https://vannordenvastgoed.nl/userfiles/file/nupali.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=new+super+mario+bros+wii+all+star+coins+world+2PDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/546e4c1c12651c65d0792614a835ecd3/gurafowakiguxadiziwez.pdfIn PDF document text

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