Malicious PDF — malware analysis report

Static analysis result for SHA-256 695b0385a9696325…

MALICIOUS

PDF

95.4 KB Created: 2021-07-21 00:59:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 62ca4e184bdfffeae06dbc704dca2f1a SHA-1: 3a9280d74e269048aaa39ed15fc1b6562b82cefd SHA-256: 695b0385a9696325c497492ea51057f5d19d2b3cd6ce7b1bb0bac72ac5adb576
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 ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous URLs pointing to potentially compromised websites, likely to lure users into downloading further malicious content or providing sensitive information. The presence of multiple links on disposable hosting and compromised CMS uploads suggests a coordinated effort to distribute malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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://pnmanagementsolutions.in/uploads/42012233414.pdf In PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c978b529faa---77147724085.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3b9cc5ca4---25225868314.pdfIn PDF document text
    • https://transmar.biz/ckfinder/userfiles/files/kisofobabitutatod.pdfIn PDF document text
    • https://tonitomov.com/picture/file/10584805886.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/c1a673ee1d19757449441d3ebff7ef7a/25552294340.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a8aca4b05f8---47987134484.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/ntvkn5fe1ejmqov2oq9l74fhgn/miworowukufovowi.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/duzinulonafev.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160efe4fd8744e---jekibirifeni.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/5f4e934fba69fca7c476d6faedc2f315/juter.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/devatosesarivegonenisapor.pdfIn PDF document text
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/pawimugutojo.pdfIn PDF document text
    • http://www.darvidproperty.com/news/file/saluxezibaxebirabanilaze.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/37349a041ad8069207594f5ddf6d0e98/87363684878.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/52c95b72bc12e482df15f4deca222b14/70766202282.pdfIn PDF document text
    • http://thermogroup.ru/uploads/files/62722029340.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/17331451566.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/f35eo3ratm5b9el0kdml8kv3qe/vunabodiwarewete.pdfIn PDF document text
    • https://gadd-asso.org/userfiles/file/xilano.pdfIn PDF document text
    • https://tonitomov.com/picture/file/99915238665.pdfIn PDF document text
    • http://lamekatus.ee/uploads/ckeditor/files/67274951197.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609232e76a001---pukekuge.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/rsav1b6j7u90t4k989g5fq7fn2/88111113200.pdfIn PDF document text
    • http://mpwlawpa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lafifidefuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=the+mosaic+law+in+the+biblePDF 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_off0000f5a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A7 17232 bytes
SHA-256: 024f9a0439f3ce69b10912f9ddea6fa2159c44bfb172e4fe63199850aeeb8f86
font_01_sfnt_off00010f32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F32 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12749 10584 bytes
SHA-256: 4193689ef2573a86f51575338e6e3631d06b103ee81134f6937781260cbc8cca
font_03_sfnt_off00013f62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F62 18988 bytes
SHA-256: 99199211f6f50462f132ac8e0012c32bc8daf7b2f07f8cc040bfbafbf0252b78

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