Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb0e682a16a1d0e9…

MALICIOUS

PDF

96.6 KB Created: 2021-06-29 10:58:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9aee24112f0b9b2ce2b81437a10a71ff SHA-1: c71abd711a185987db2b0f524a83d5174c793345 SHA-256: eb0e682a16a1d0e911e1bfe3debf59753ec3056d1b2b95af65498994a5c2cdba
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, which likely serve as part of a link farm to obscure the ultimate destination. The presence of these links suggests an attempt to lure users to malicious content, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/39d22881c978aacaf217efeff0a0ecee/55557295154.pdf In PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/b0bb6cc6dc500aae9ba5b57cbb1e49fb/93612374097.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b23903886---lefebelunamuvozuj.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/7259auu8qqeo7ioqa1kcbu6g60/tesokejidaxatupesiv.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/7nkguep5polkcpbtiitpjdaiih/48516441303.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/ac7674b6da362b3a6453374e3006cf24/lamukarejomubexeb.pdfIn PDF document text
    • http://bocghebinhduong.com/media/ftp/file/99844837212.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4035bdfb1---podazujabezugaroxot.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160833bd15c5e0---63008026095.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/6eac7ec172c3fe3514435871b0681d18/tujajebirovoguzulijenelid.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607f61f961dd1---52115335634.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/g5sbgt0540j9qtp06bbu4m3gjj/95087831743.pdfIn PDF document text
    • http://dioceseofniranam.org/userfiles/file/54748764552.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/javegap.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/xokijinoruxazibujuwotife.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/jixizurigofowuwezoxanaxe.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c75efa80b5---paberejip.pdfIn PDF document text
    • https://fresh-cherries.com/ckfinder/userfiles/files/9256838490.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160a0e9dd1692f---sudinixovom.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/63665905579.pdfIn PDF document text
    • http://aivieksteslaivas.lv/userfiles/file/vobopufezosok.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160cc2dbde0ffe---61873914700.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/eb55d74503d78a784ef824ddd40b3e75/rowurozubujedekonata.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=lily+potter+and+scorpius+malfoyPDF 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_off00011590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11590 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012da2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA2 17904 bytes
SHA-256: 2daeabe5778f7e0da835b1aae9d9c8c24296947e49db57fb1246624335cd3a46
font_02_sfnt_off00015be4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BE4 10952 bytes
SHA-256: 6925513ce3e70d9e7957632ad887dc59fba9cffd19393cc7a17b2305cd9642d9

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