Malicious PDF — malware analysis report

Static analysis result for SHA-256 062504d6516c292e…

MALICIOUS

PDF

70.1 KB Created: 2021-09-24 01:14:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 917cad5fa1e02b062e56286ef2c679e0 SHA-1: 798f863ce13ebdfe5f165c9d5807229445af1ae7 SHA-256: 062504d6516c292e8ad1aa5c97fa1b0d61960ad0268027f9fe7828b0368154e9
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript, which is often used to redirect users to malicious websites. Several heuristics indicate the presence of link farms and compromised CMS uploads, suggesting an attempt to host or distribute malicious content. The ML classifier strongly flagged this PDF as malicious, reinforcing the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://catamma.ru/uplcv?utm_term=ppsspp+god+of+war+settings PDF link annotation
    • http://musicfriend.vn/public/default/ckeditor/files/73522404017.pdfIn PDF document text
    • http://bsa-billiard.by/images_from_html_editor/file/jexesesawokoguzimisub.pdfIn PDF document text
    • http://strahovka66.ru/userfiles/file/zepuguxulonopulo.pdfIn PDF document text
    • http://maturitni-ples.eu/UserFiles/File/29006756813.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/e9ce75b9c0f7e9ac54cd860b530e6e02/31458176180.pdfIn PDF document text
    • https://livre-d-art.com/ckfinder/userfiles/files/jojinarirukugunolaf.pdfIn PDF document text
    • https://soroptimist.be/oldsite/intranet/ckeditor/ckfinder/userfiles/images/files/roditamep.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1613ec36caa409---2826188644.pdfIn PDF document text
    • http://congseng.com/uploadfile/files/91185798522.pdfIn PDF document text
    • http://kredoteka.ru/uploads/file/49985238225.pdfIn PDF document text
    • https://pannonfinanz.eu/editor_up/33142270229.pdfIn PDF document text
    • http://chaukitchen.com/uploads/files/85343172290.pdfIn PDF document text
    • http://top-rubber.com/admin/fckeditor/editor/filemanager/connectors/upload/file/pulororat.pdfIn PDF document text
    • https://www.zolmedis.lt/ckfinder/userfiles/files/64876121442.pdfIn PDF document text
    • http://musclecar-taps.com/js/upload/files/nisavogabufizomupubo.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613b3b03dd422---82817659969.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/risotavabisudo.pdfIn PDF document text
    • http://sun-tes.ru/files/file/muminelumoxefitigurudab.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1614735adc249b---25256691191.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/8f34700d186bdaefcd016bdd2e8eac0e/44429314965.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/a8647baafd6dd593d536a3192f723e70/kedodoxadorob.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149ab80eafa5---kojosagidis.pdfIn PDF document text
    • 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_off0000b273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB273 15604 bytes
SHA-256: 78bef2f9c5b7e2d3ec0ba81d0a00044c5d922c3342db047a6bc2b605c15a47b3
font_01_sfnt_off0000da41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA41 10716 bytes
SHA-256: 408449cf0714e3e435c5da94940b4d779e30696ad6c32415ccb1751ccef01361
font_02_sfnt_off0000f2dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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