Malicious PDF — malware analysis report

Static analysis result for SHA-256 f495742881fce221…

MALICIOUS

PDF

83.5 KB Created: 2021-08-04 08:35:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a38d721e714695df053dd3d857d0434f SHA-1: 1af002b85f5527c1826cdc283ad2cabc5ece8f1e SHA-256: f495742881fce2219b6fea81f5af4e8b3d5597776bf96a333883ece382d4a9e4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and ML classifiers. It contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised CMS sites. The primary purpose seems to be directing users to potentially malicious or phishing content hosted on these sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5610

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://memoservicesrl.it/file/30688042423.pdf In PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/c16e3lv371v0l6ibrd18gf2ic2/93906011920.pdfIn PDF document text
    • http://lexen.ca/userfiles/files/jeduzavu.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/71380547683.pdfIn PDF document text
    • http://erex.hu/upload/file/lekepijo.pdfIn PDF document text
    • http://xn----7sbab1bcaqplb0ccyi9d.xn--p1ai/files/file/12871344281.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/6t9fp8f8vbkmprjs5920uup3n5/45126097881.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16083b0ee3e6f0---kovozudisu.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160928b06d9223---videfanefakonolokila.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/64105095617.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609e7f4fee07b---lafaje.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dfdd3a93b47---bijaxavaf.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa7362c374f---dugovijopunutuvixubaja.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/97027884062.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/57359729194.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079cd39266f0---13614929174.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/pgjts0k4clsqg72e01vhd4jeo3/25977743401.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc842420adf---wefitujenaraza.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160850718eb3b1---44893014440.pdfIn PDF document text
    • http://hnc2.com/userfiles/file/19079450943.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afb2d1dc7b2---metubigewolupulad.pdfIn PDF document text
    • http://abwingssuffolk2.com/uploads/files/tefogibid.pdfIn PDF document text
    • http://xn----dtbsgbucafmmaf.xn--p1ai/servimages/editor/files/17695037387.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4d7b13d4a---68489485013.pdfIn PDF document text
    • https://anup.bo/images/files/dolukek.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-5/file/36916371317.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=residential+treatment+programs+for+borderline+personality+disorder+canadaPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010382.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10382 11264 bytes
SHA-256: 66e12635955ac51738b6245dc14a5af5eedc478fdc91ba0c8db4a315f1c59e38
font_01_sfnt_off00011d85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D85 17164 bytes
SHA-256: df420989248518a9a3cb2da83625910025aeb790bf1d8e04d83c9ca74d24b1a5