Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccaf0c06faddb79c…

MALICIOUS

PDF

64.0 KB Created: 2021-05-28 00:58:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 149735308c72270416b116d2d85531af SHA-1: 95793b074c75bc332b38fda5152b43e2ca885a72 SHA-256: ccaf0c06faddb79cacb7bc9930d62505b3d585b80b3a0ca5decab01dba4893b3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to educational materials, likely to trick users into clicking the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8461

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.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a0193a1a991---29929799239.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160869b001bda2---4494012395.pdf
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/60311d3e725ca0155ddf2d076e28cff3/jibek.pdf
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/1df2c37c09d399fa211c08fcf1232ddd/97322172385.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160931fb4ad54c---43744618762.pdf
    • http://scamps.biz/userfiles/file/lafor.pdf
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771f5c1c9a6---75443072936.pdf
    • https://footballsod.com/images/ck-uploads/files/96175328123.pdf
    • http://tuzvedo.hu/elemek/file/19705325246.pdf
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a081247861f---piduzupakorifi.pdf
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090508c8869c---moxepu.pdf
    • http://curry-box-deluxe.de/userfiles/file/xumirigijebimulozerutape.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160712d57c6b87---75602558810.pdf
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c857329e63---74177486241.pdf
    • https://betenagro.com/sites/default/files/file/mowutobatevenotumofop.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=nursery+class+maths+worksheet+pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d528.bin
4182092c3d01d331a4f4722267313595a93eeb335d199282aaf69eaa9e859633		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD528 5620 bytes

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