Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb52bf5097e2fa29…

MALICIOUS

PDF

74.0 KB Created: 2021-09-05 23:09:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2729e4a56681dc139176681a6cb01419 SHA-1: 4f31d8bc4e4e0010e2fcdcbedd28479ae7377e42 SHA-256: eb52bf5097e2fa2963295bcaa3df3ebe8a33a1c0fd68faaf2d5d3c7f412fd22f
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to websites hosted on compromised CMS platforms or disposable hosting, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://zartmobilia.com/userfiles/file/20210721065408.pdf In PDF document text
    • http://moestuinwebshop.nl/userfiles/file/tovazo.pdfIn PDF document text
    • http://bougerpourstarlight.org/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/xugorarefedepakuv.pdfIn PDF document text
    • http://www.serenissimaservizi.com//files/nibolo.pdfIn PDF document text
    • http://thaisomboonautopart.com/userfiles/files/15215141818.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7fb4d7a3e---vifokepuvelijusinosogavov.pdfIn PDF document text
    • https://buyafranchise.org/files/files/pokesekupukazolo.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16085ebf1a45cf---52023801332.pdfIn PDF document text
    • http://rld-carbon.ru/file/34871937638.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/11723181699.pdfIn PDF document text
    • https://cristalparkhotel.com/ckfinder/userfiles/files/15708921351.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/wopimenidiloximomavajes.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/12075276761.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/b7cd46dbb3b5d8aede5e7c55ecf3882c/govaritanunopavinanu.pdfIn PDF document text
    • https://talaa-obour.com/webmisr/uploadwebmisr/file/vomaforadukivavulurob.pdfIn PDF document text
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/xowowowigibew.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/3546544996.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/6d4ce5eb9f429143e4aa6d9e21b92890/puludotafe.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/25f81be547af732e32d980b4d9ac3c6b/gamalovadu.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161059bdf84cd2---55132599257.pdfIn PDF document text
    • http://yngc.ru/admin/ckfinder/userfiles/files/logesokiwotimiw.pdfIn PDF document text
    • https://alzubidi.com/userfiles/files/bunozugixovomago.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/c07e6e3a3ed82a52be7c9a068112e09f/pejagajiworuzanip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=faizan+e+tajweed+pdf+free+downloadPDF 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_off0000b557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB557 10576 bytes
SHA-256: adfa9be10103b9525abeb961efae01433b30b255b8811d9ab3af523598a152e8
font_01_sfnt_off0000cd99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD99 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e5ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AB 20264 bytes
SHA-256: b06174db4d3c9426b402004fad58a35b193b6ceca3a2ff54b09f2983ec350e52

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