Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b9ebaa34cf2f38d…

MALICIOUS

PDF

80.0 KB Created: 2021-08-10 13:04:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1e48fa6a8a2cdb66dd11826736e0b5a1 SHA-1: 14eb0c8b1f5ee3610b1d61c394b9ea294f212a17 SHA-256: 5b9ebaa34cf2f38d4d45fe1bab5ef0728e920c897abc8e16e793b7335dc14dd2
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous compromised WordPress upload directories, indicating a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, with the links likely serving as lures to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9333

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/5d41f65758f2d0d0a35f9832b8c15f02/kufomawulakowoxaz.pdf In PDF document text
    • http://clubesquilacoma.com/uploads/files/fonexe.pdfIn PDF document text
    • https://bucatariizidite.ro/printuri-fi/files/gowuzezapatabogaxu.pdfIn PDF document text
    • https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/bc0c138c62651e1775e051f820e9e511/gabadomopo.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/29753850868.pdfIn PDF document text
    • https://langumeistras.lt/i/File/baximuzegixawumevadi.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac65867c347---9835941384.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/a9657483f97a649902107e9a26e73758/56529300207.pdfIn PDF document text
    • http://aj-freight.com/ckfinder/userfiles/files/mebujakusej.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/nolix.pdfIn PDF document text
    • https://www.benkorner.nl/admin/library/ckfinder/userfiles/files/8911050279.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/ec4e0660f0c67398d4338fa00d8103a0/93777443683.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/24285551274.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bcfb6183e59---vebuw.pdfIn PDF document text
    • https://zzwgjx.com/d/files/zefijupubexuni.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/d3f53409801e409e9538fafb0a92ed0c/11857296127.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/5a802de328a6acb1d460637f0263320d/wemusa.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/a9da0849795c3f6cbbd881d710515b70/14462256764.pdfIn PDF document text
    • https://hosvagyok.hu/userfiles/file/56745880174.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16073d8f5efe01---59141267732.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160712354e1e15---nuxamerafugatofifoduga.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4f8c34dff---10644668637.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+use+excel+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_off0001165f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1165F 17600 bytes
SHA-256: c8c4e637551011ef7e3def1aadaf7660bf88f459bf11b204ab6d3f32209b8ce5

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