Malicious PDF — malware analysis report

Static analysis result for SHA-256 b40a4cb9eb30b4da…

MALICIOUS

PDF

101.4 KB Created: 2021-08-20 20:54:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ae6f05692d6d1a6ce3f3b91c889bdf38 SHA-1: 518f40de48b39b6c6cccb3ddbd26101db296bbfd SHA-256: b40a4cb9eb30b4da26685ae13f3e9a2e8967b254638537feee752020f55d625a
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4370

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://truckforceone.com/upload/editor/file/lejoregigakazem.pdf In PDF document text
    • http://ratchee.com/ckfinder/userfiles/files/75997745066.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/19fe10659944758b8c2cd0c9a829c709/dilakasupur.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/kkf7ic31bh7m65odskc9dbkir7/savabobedowe.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/340894be3344aa5c71fc58cddbbb5ec9/42624811294.pdfIn PDF document text
    • http://bscartridge.com/pic/pukem.pdfIn PDF document text
    • https://brigitte-farner.ch/userfiles/files/dijasexewupifaja.pdfIn PDF document text
    • http://staceyasp.com/UserFiles/file/vaxejomuwug.pdfIn PDF document text
    • http://qhs1978.com/clients/d/dd/dd8db5a278a7ad55a2ada34b8e38ebcc/File/sufijusowudopo.pdfIn PDF document text
    • https://carparts-fixture.com/file/file/mufabivafamekevamawa.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/kalolilak.pdfIn PDF document text
    • http://maduraicaterers.com/app/webroot/js/ckfinder/userfiles/files/namesavule.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079c1e800ed0---27079515844.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160783390f2c41---46468123050.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/6462392251.pdfIn PDF document text
    • http://www.ktgroup.co.uk/ckfinder/userfiles/files/gitisubibuxepovuvog.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/912372dc12e191aa19f7cd0b35146664/watewumeduliramakajigawal.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/6d89686d5074feba98114bae0852de04/16053601587.pdfIn PDF document text
    • http://tradeweb.es/userfiles/file/titulalatajiruju.pdfIn PDF document text
    • https://eijo.in/ckfinder/userfiles/files/15859389941.pdfIn PDF document text
    • http://maility.pl_adresuserfiles/file/vigitunaduworozivatuneti.pdfIn PDF document text
    • http://gostinica-domodedovo.ru/files/satim.pdfIn PDF document text
    • https://aedwea.com/upload/foto/32991030330.pdfIn PDF document text
    • https://mmoxx.mn/userfiles/files/9161050942.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=max+horkheimer+teoria+tradicional+y+teoria+criticaPDF link annotation
    • https://lapdonline.org/file/xotonexotezotojewoz.pdfIn PDF document text
    • https://tes-sys.com/uploads/ckfinder/files/20210705/16254152332346.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16975 18824 bytes
SHA-256: 87a1c558f80b8680e425f6c79aad9f9c82c9733d6a7c0a9eb7ddd18877f40415

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