Malicious PDF — malware analysis report

Static analysis result for SHA-256 12560baba6cc765a…

MALICIOUS

PDF

60.9 KB Created: 2021-09-01 10:38:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1861aab331fddbe51e305a1ffc6d61fe SHA-1: 0c4f9db3076b7dd484e60cd78655f1d1b37f9930 SHA-256: 12560baba6cc765a56cbdc764caf29c4c435328cc70967c0d6b96596c0900a02
154 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it is a link farm hosted on compromised CMS upload storage, designed to redirect users to malicious content. The ML classifier and ClamAV detection further support its malicious nature. The primary attack pattern involves tricking users into clicking links that lead to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7892

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://pielinks.com/UserFiles/file/zikofotivepolevuwed.pdf In PDF document text
    • http://aow.infogestnet.it/ckfinder/userfiles/files/90156517735.pdfIn PDF document text
    • http://ongnuocdenhat.com/upload/files/leloruwisoguxasej.pdfIn PDF document text
    • http://poslovniimenik.net/firme_data/files/kubuzepazuna.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/a87a61a0de7973f4f0cd722e16013323/64029060884.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/lukuwufipanudetizasi.pdfIn PDF document text
    • http://argyler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f83160055---goziwok.pdfIn PDF document text
    • http://kiavysocina.cz/UserFiles/File/16557788726.pdfIn PDF document text
    • https://mimpiindah2.com/contents//files/89064641334.pdfIn PDF document text
    • https://ngusacdon.com/upload/files/58719724891.pdfIn PDF document text
    • http://creaorganization.com/depo/sayfaresim/file/97325119003.pdfIn PDF document text
    • http://www.primariasantana.ro/uploads/file/wogojesi.pdfIn PDF document text
    • http://sonsuadogo.org/Images_upload/files/gozipe.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160772125a9e14---65657993855.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160847ba0777f2---92202242497.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160787d16ea8fb---91195204183.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/5280b483d115160e405d073f7c4bc958/vebaturipe.pdfIn PDF document text
    • http://icmasistemas.com/userfiles/files/5690644254.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/4k2ao2hlojj9m9485hphlvksmn/ledegabapozuwako.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/3028255057.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160779721c665e---bipaxixezorufidonojoko.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=meaning+of+practice+makes+man+perfectPDF 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_off0000d76f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD76F 10860 bytes
SHA-256: 0b2f239b0972d2e3eaeaf79cd125db49022b4fbb516427f776aeb939f3e887f8

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