Malicious PDF — malware analysis report

Static analysis result for SHA-256 01969c9633d46973…

MALICIOUS

PDF

95.3 KB Created: 2021-09-08 06:05:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: dea52a5909bbafe1fc1e8187a0e8f648 SHA-1: 552e848389ee4279f2f9a0b51f10faf85f683876 SHA-256: 01969c9633d469737ad9bdf5d0ccc7d0c115de1238d6415b2ba0728287b35fd0
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, a common technique for executing malicious code within PDFs. It also features a link farm pointing to multiple PDF files hosted on various domains, some of which are identified as compromised CMS uploads. This suggests the PDF is designed to lure users to these links, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • 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://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160741e3bac8ce---20047569393.pdf In PDF document text
    • https://pilot-nav.com/ckfinder/userfiles/files/viverelujajivejug.pdfIn PDF document text
    • http://www.colormotion.cz/UserFiles/file/42995514861.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5ab32eb1de---webikif.pdfIn PDF document text
    • https://commonwealthsportsawards.com/userfiles/file/39138112327.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eaba123bed---20871939672.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160718f9dbc144---4333637405.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/190213061184.pdfIn PDF document text
    • http://hz-karavany.cz/ckfinder/userfiles/files/61858073532.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160c05d82c65d8---27294096569.pdfIn PDF document text
    • http://stensoproject.com/userfiles/files/29591419014.pdfIn PDF document text
    • http://rabotatver.ru/userfiles/admin/bilajul.pdfIn PDF document text
    • http://phutungototuanphat.com/img-tvdl/files/90896707079.pdfIn PDF document text
    • https://ozmutludokum.com/userfiles/file/87376148997.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16072871a82c36---39796823220.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/gumopogumujolar.pdfIn PDF document text
    • http://vce34.ru/attachments/file/begawilodosunoramow.pdfIn PDF document text
    • http://theprojectmanagement.guru/cote_dor_import/admin/ckfinder/userfiles/files/30851458051.pdfIn PDF document text
    • http://porpora.biz/imagenes/imagenes_contenidos///14720686643.pdfIn PDF document text
    • http://arcadia6465.com/clients/f/fc/fcac8d81e62e7f23ed02b02243def538/File/90013871123.pdfIn PDF document text
    • http://naoshima-habitant.com/images/blog/file/surezasuruka.pdfIn PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16082f781db188---96158631450.pdfIn PDF document text
    • http://hiace-yoshikawa.com/js/upload/files/jisonuwuximirowinuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=budismo+tantrico+tibetano+pdfPDF 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_off000107ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011fe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE5 11028 bytes
SHA-256: 5dea2c4b985cb0fdba0289c4183d80c9ea607017426592dcae0baf538c5a9b06
font_02_sfnt_off0001395b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1395B 20880 bytes
SHA-256: a99218f86ffaf3340a49a0e22cc7ab1bca3ea4bfabbad6e75f1662495cff13da

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