Malicious PDF — malware analysis report

Static analysis result for SHA-256 07663648ad619ef6…

MALICIOUS

PDF

211.7 KB Created: 2021-08-01 10:19:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5df3e4c31addd8fdbc143edf4af5bc0a SHA-1: c7d1ef0a88c6feb2c4bc82f92c74abf720c1ffe1 SHA-256: 07663648ad619ef60bdd6af8777908b4a2a2a0830d34d53411c5a6da2c17b24e
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple links pointing to compromised WordPress upload directories, suggesting an attempt to host malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of external links indicates a likely attempt to redirect the user to a malicious site, possibly for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9509

Heuristics 5

  • 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.
  • 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 http://liveranigioielli.it/userfiles/files/27801863963.pdf In PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16090e5b7a4c29---45031659389.pdfIn PDF document text
    • http://www.trafikyaren.com/wp-content/plugins/super-forms/uploads/php/files/ssj6222rv5ll4qkmdj4h2u1042/zimup.pdfIn PDF document text
    • http://skyrun-arser.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210626204317382043gp68ew.pdfIn PDF document text
    • http://tropo-design.com/ckfinder/userfiles/files/suvebumujevivowaberevizif.pdfIn PDF document text
    • http://carzip.biz/files/uploads/files/regotibu.pdfIn PDF document text
    • http://cdseoulps.com/uploadfile/fckeditor/file/93655304588.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c868d37dd25---tuxeki.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/08027570518eaa822611a373a89b9828/saxevomezozupisotemezu.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/fv04g1kh62ajrokg4cptskngu1/37434547116.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/87613583785.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b81970707f8---balamebodajiso.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/ucqf1bd4oevf5i2ni17kcd4jp3/21638503144.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e3f5cbda7---90345822678.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079fdb7b55a1---lipurewobaxotekuk.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105cdd61f80e---samozemuge.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fe5433ab7a4---korusapadujuvadu.pdfIn PDF document text
    • http://businessvaluationapp.com//fck_files/file/90201252959.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/gamepaz.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f491e398c5---larejogemesivifupozigepa.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608c2ee896aba---98735143128.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/kumajapabon.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/32808375474.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160d2afab8832a---27363839068.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=mendeleev%27s+periodic+chart+worksheet+answersPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002ba63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BA63 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0002d27a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D27A 10884 bytes
SHA-256: 15f8a3775df30a9cb617247d5c6328ca557472f7c6249c7ba9c68c79a2524546
font_02_sfnt_off0002ebab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EBAB 25156 bytes
SHA-256: d149db665085ae5718c7f2856337d2584653599d81f4a3d7d53f84ec31a6823a
font_03_sfnt_off00032a41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32A41 16168 bytes
SHA-256: 1cfb00680a8a18ef5d5af493cc5b57cfe410abeba37087ee2ecd799c98b61e68

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