Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c68da29fad7344c…

MALICIOUS

PDF

156.6 KB Created: 2021-07-05 05:30:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ed109f1fc726570f9e3c860f25bc3f32 SHA-1: 84429d436a513c39d8767f6064dbafe51dc2b11f SHA-256: 7c68da29fad7344cd400fb8b3052c0cd6d293787d731f5d43b7d78983b2d36f3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous links pointing to compromised WordPress sites, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest malicious activity, likely related to phishing or malware distribution. The presence of JavaScript suggests it may be used to further exploit the user or download additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16098a4dc8755d---teroruk.pdf In PDF document text
    • https://iwnta.com/userfiles/file/75134907461.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075299ed1bfd---7111446887.pdfIn PDF document text
    • http://mdknoodles.co/uploads/files/33425212656.pdfIn PDF document text
    • https://homeuu.biz/upload/ckeditor/pages//files/67502295346.pdfIn PDF document text
    • https://maspacientes.es/wp-content/plugins/super-forms/uploads/php/files/svlglsm0n3smfudlp64ahmq8mm/29975628518.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/27666614104.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/f41651dc8fe9cc2e6a461e1798af66b5/67461444583.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/a991324d4e4a02d1bb0ef7457912a60a/vizafejiwazoxozew.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076a06fae06e---35542084698.pdfIn PDF document text
    • http://perfectionistpaintingnj.com/ckfinder/userfiles/files/vovuxoza.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/rumorobibinixozidiruvugi.pdfIn PDF document text
    • http://due.pt/js/ckfinder/userfiles/files/83637182020.pdfIn PDF document text
    • http://wchs67.com/clients/f/fd/fd50fd9748f3592dabdfdad26f378f15/File/83527901143.pdfIn PDF document text
    • http://www.ecostroyservis.ru/File/44423891792.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2410de8983---98980771836.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/79628a8295cf610d49908259c38e5842/44005355475.pdfIn PDF document text
    • http://naitikfashions.com/ckfinder/userfiles/files/ligupof.pdfIn PDF document text
    • http://itkaufmann.com/images/fckimages/file/ginef.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ph1omqekd1ac1hj5v62mi83ku6/25550341436.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/l42k9lichpoequi9pk9ld8jp62/mozuta.pdfIn PDF document text
    • http://bukharaatlanta.com/sites/default/files/file/mufelalur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=ionotropic+and+metabotropic+receptorsPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ffe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FFE2 19416 bytes
SHA-256: bbe7ffedcce0acd183569c8e28591e8c28c63399a3bc6e19039fe0e892a73c5f
font_01_sfnt_off0002327b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2327B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00024a92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24A92 10720 bytes
SHA-256: e964784f8ba428735e7d77ebeafedb288396e380372b13f3eb4e2fcd26f8c2bd

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