Malicious PDF — malware analysis report

Static analysis result for SHA-256 0137817da8914666…

MALICIOUS

PDF

72.0 KB Created: 2021-06-27 04:21:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: 9ec0c464bb182993fffbe93a556dbb56 SHA-1: 553988208467db3a2d574e7430e51b1a3810ebb4 SHA-256: 0137817da89146663bdb65135700193a334cf0a8474ddbb6b664b8c55da1a735
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm intended to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to lead the user to a potentially harmful destination, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7409

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://archism.ru/uplcv?utm_term=jcaho+questions+and+answers+for+nurses PDF link annotation
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/2f258374a132e06f1f5ef9c65a55aeb8/49971902274.pdfIn PDF document text
    • http://bioscipublisher.com/files/upfiles/file/24879169820.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3e2260b19---27923392774.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/riguwu.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16072dac6b135e---57542667897.pdfIn PDF document text
    • https://minipowerpack.net/upload/files/judotanelajode.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a721d697dc4---11722359946.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/6742a4aebc61eaf7d21893693abb99a5/rebarezekepitoz.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160828fa8923e4---tuveriwemejuwufuvetagu.pdfIn PDF document text
    • http://josepholszowka.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/53459688245.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076147d6743d---pajimopemip.pdfIn PDF document text
    • https://amblamy.ee/upload/file/galirojudazamunoduwesabep.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa3d4dd82b---9706289454.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6661035c40---rotidujoxerelu.pdfIn PDF document text
    • http://ehsclassof64.com/clients/b/bf/bfa5c4411462ceee4a19e543862d902c/File/nekokewotirirotog.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b1afb7a99fc---dazatibaparaledov.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/2a6e398de586c5a7a2def52df29c47bb/juminil.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b76f83d823c---27394850311.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/rewatafar.pdfIn PDF document text
    • https://samavetpharm.com/userfiles/files/kuwedelematut.pdfIn PDF document text
    • http://ecolservizinettuno.com/userfiles/files/96000098061.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/bacpjpfhl99u2n2vfqviqpo8g0/tuxezurodugajiz.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/17854369678.pdfIn PDF document text
    • 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_off0000f158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF158 17792 bytes
SHA-256: 1db023ec85414077121e373efc3ae2b9a00c6d2fac46892dea71b811dd9f9b37

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