Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bf450552a193e38…

MALICIOUS

PDF

91.0 KB Created: 2021-06-26 12:42:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b8b7ba4f073fa7aa57d3a95ad3a7ae03 SHA-1: 1c9a44bece79e9dd81355ee48f944c55e2edb11c SHA-256: 2bf450552a193e386a6de90c2ed1a4ea8453b9413d0484f496ab5a89d8e64667
196 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious content. The 'SE_PAYMENT_REDIRECT_LURE' heuristic strongly suggests the document is designed to trick users into changing payment details or accessing fake banking information. Numerous external URLs were extracted, many pointing to compromised WordPress sites, likely serving as part of a phishing campaign or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://pixomot.ru/uplcv?utm_term=how+to+delete+outbox+mail+in+outlook+2010
    • http://smitheaster.org/clients/861344/File/43862585845.pdf
    • http://www.findvoters.com/userfiles/file/nodixaxekarez.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160714aa93a3b8---jaxebopomewis.pdf
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/c13f766769654d4ca6ff58b6c61ebd6c/futibozozasaziwa.pdf
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/zozavepabemodinapuxo.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce27bb7f3a---32912561696.pdf
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072fedbdb2ca---50161052622.pdf
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a59ad9241c2---2226845192.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160939e9aa4ea2---pavajogebogutik.pdf
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/99c4fa25367f2dcf01a2d6e2c9b795e2/61029000359.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f504da63ad---84314955092.pdf
    • http://cupta.org/userfiles/files/20210611055829.pdf
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160d02d826bbb2---sexikugimofaf.pdf
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/9233d8b9aedcb2f562f3ff2cd07cf677/83593701738.pdf
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/aa0a587427f86899fe75ee509dd8bc33/zabipunelojiraga.pdf
    • http://rideabikenews.com/user_img/files/turatisezijakesedezowe.pdf
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f80b6ea045---88634915103.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091394a9f85a---kabojularurote.pdf
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/09d7d37b13d475d5de827d717a76a76d/fisofenorizemiwavuxekib.pdf
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160abb1eaa28b7---noxagu.pdf
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/637gv63im9e4o4gd3r97ns1e2n/28684333225.pdf
    • http://shs1977reunion.com/clients/41590/File/kewuzibojuza.pdf
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/fa8727de32d1508028d3008f44d88ea4/50515227765.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fea5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA5 16792 bytes
font_01_sfnt_off000116b7.bin
f9a886a5196ac13311726c42e9d7068cf6fa0cb504f1fa9aff28f3e0e0b147f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116B7 17112 bytes
font_02_sfnt_off0001438d.bin
1731fc80dd1467552eb6d790d6e70d9e8d12a04e36df47d9a95985793783ad1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1438D 10948 bytes

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