Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c70658559f12e9b…

MALICIOUS

PDF

79.6 KB Created: 2021-05-06 18:08:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6f2ed0d6430ec288a373e717d285e71 SHA-1: 372825d5406b32c05e2993bb4a254e9ff11c83e8 SHA-256: 9c70658559f12e9bee5520547944cbf5bf151bc8e7e757aca9f4c58f6403db02
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a link farm pointing to multiple domains, some of which are hosted on compromised CMS upload storage, suggesting an attempt to distribute malicious content or phish for information. The presence of numerous links and the use of disposable hosting reinforce the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6742

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://andlupa.com/userfiles/file/65971633485.pdf
    • http://www.annaleehuber.com/content_files/file/dukana.pdf
    • https://www.deuba.info/wp-content/plugins/super-forms/uploads/php/files/5o8f63ef399kfjk4o98k7e3ne3/60355285308.pdf
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/6i12bmejl734q7am0tg64a5fi0/442655251.pdf
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/83d5b37aca6c03bba53757a4e24d60f6/lewelenog.pdf
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608170ab4a85e---gorazofapenal.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9d3240d1c---nifewinidivebidepefoze.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9942e5b55---70495335911.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/gisapobejaxetodoju.pdf
    • https://www.analfissur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083afd41131d---zobewuvamopotawuka.pdf
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/jpp5pnefjigol9m118ekf659f4/kojowekidaxibapuzo.pdf
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/s18pkjgvvjg2hp9bkdf0idk27n/63637711167.pdf
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/69832d5033786fff49c2891a2be24db0/mekubepabaridip.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7df0d0d65---pagabesovanobuxosata.pdf
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/f85fc40a3ee691d6f935f36ff5945029/38170397705.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=beauty+plus+old+version+apk+2016
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010dfc.bin
9e8301a812e0963997f2c69c75bfd39e7fcc44359b8a43baf6657440e065e79d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFC 2960 bytes
font_01_sfnt_off0001186c.bin
66ef8e2769346b350141afd1e37c84ced06a7e221100d4274749b291771343c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1186C 5708 bytes

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