Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0dd45e459316f49…

MALICIOUS

PDF

74.2 KB Created: 2021-09-09 13:49:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 802d87fbcfbf09e9054d465e763cb861 SHA-1: 222c382dcb035c0ae81f8ba616b5eb7b294f1e61 SHA-256: b0dd45e459316f49dac852050cbb3be5cbf68ccbd6c0191a86d9ee27f4ae1aca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to numerous domains, many of which are hosted on compromised WordPress sites or disposable hosting. The embedded URLs suggest an attempt to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • 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
  • 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://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613927799d676---zorelabowalixibe.pdf In PDF document text
    • https://paardenwelzijnscheck.nl/app/webroot/files/ckeditor_files/files/84032938168.pdfIn PDF document text
    • https://bayihoki99.com/contents/files/gazebusitosojowozowagem.pdfIn PDF document text
    • http://squarcialupirelaxinchianti.com/writable/public/userfiles/file/79831612809.pdfIn PDF document text
    • https://demo.wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/72138251991.pdfIn PDF document text
    • http://royalwedding.jp/images/blog/file/97514957678.pdfIn PDF document text
    • http://centreforeffectivecoaching.com/media/file/26322375821.pdfIn PDF document text
    • https://jordan.si/dokumenti/file/pugogukasijawixukizegape.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139947713242---zerojilo.pdfIn PDF document text
    • http://hangquangauto.com/files/zuwedaxuteg.pdfIn PDF document text
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/43637154316.pdfIn PDF document text
    • https://vibingvibes.com/userfiles/files/32450980649.pdfIn PDF document text
    • https://thai-airpark.com/ckfinder/userfiles/files/24394551032.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130969907e75---tawoduwoxedaxalajilob.pdfIn PDF document text
    • http://tunapvietnam.thietbiotoviet.com/Images_upload/files/tezapetetawog.pdfIn PDF document text
    • https://sunnyvale.com/wysiwygfiles/file/vufadujolijowal.pdfIn PDF document text
    • http://nutrizionisti.eu/public/thread/risorse/file/53707856855.pdfIn PDF document text
    • https://ijaetis.org/ckfinder/userfiles/files/rikesafemup.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/23165617497.pdfIn PDF document text
    • https://almuhja.net/ckfinder/userfiles/files/zexirololugelujiz.pdfIn PDF document text
    • http://logicparcel.net/uploadsEditorfile/sijetowof.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/9c8f4fab7bc2ff352844236eafe13489/felosa.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/24957a3eff68cfaae5236758b74b44bc/loxiror.pdfIn PDF document text
    • http://ecosdaliberdade.com/ckfinder/userfiles/files/luzukezowunudexob.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16134f6839a85c---35122319589.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=phone+scale+appPDF 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_off0000bfde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFDE 10184 bytes
SHA-256: bc2f85dc6d38c64806b9cfb0adacc6e5dc73dffa8e75daf43372a2822c3398e4
font_01_sfnt_off0000d69c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD69C 17220 bytes
SHA-256: c70f20a69392519042b8a40604f7a108dcb3faae306bf44fba24ce0293895f82
font_02_sfnt_off0001033f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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