Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fe4f2cb0afdbf0a…

MALICIOUS

PDF

76.2 KB Created: 2021-07-24 19:51:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9ed513e5dc076fbe7bfa1dcdea02b272 SHA-1: 410c2fd01a0c318c00a9326aa04eac132bfc3901 SHA-256: 5fe4f2cb0afdbf0a75abc747cd840dcbc49180665917dfc9a0f6ff849ae44111
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm with numerous external URLs, many hosted on compromised CMS platforms or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were directly extracted, the structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9162

Heuristics 5

  • 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
  • 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://accesoriosalmayor.com/images/userfiles/file/79862969388.pdf In PDF document text
    • https://communeouchamps.fr/userfiles/file/xolarev.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/41560ab01f5c80e41fa7f7b203321c63/bejiwuvabujirol.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bda44744eda---zafulovumebomejiwen.pdfIn PDF document text
    • http://alexhofford.com/temp/files/file/fameruf.pdfIn PDF document text
    • http://ddservice-bmw.pl/userfiles/file/58524973483.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160cddbdccda9f---42692747470.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/61859159102.pdfIn PDF document text
    • http://moscowprice.com/content/xuploadimages/file/tufafim.pdfIn PDF document text
    • http://hhs63.org/clients/8/88/88ec95b665b56da82b1de85f097fba10/File/95226226999.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/a376c6dfc1b226c5e9b043b1d28bd4ff/sonadorogol.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4dac42de2---28477174159.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae42d1c565---daponizolebela.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608f2371ef382---36101403647.pdfIn PDF document text
    • http://khangvietdn.com/uploads/file/4322592874.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/ba0ubgapem8eh15j4mlcpbebj3/wadeviximakopobep.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/80702535850.pdfIn PDF document text
    • https://simondaulte.com/ckfinder/userfiles/files/8321719828.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/40193776629.pdfIn PDF document text
    • http://mebco.ru/images/file/gulegub.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/82aea8c3e0a83e75883d3f82e5760dc5/bitibotetur.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/1d1f7001c4ad36c8d55f33ee8cb9d11e/rapinekesakopojaxisaku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=deep+vein+thrombosis+treatment+nice+guidelinesPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE4 11268 bytes
SHA-256: 514df71181d9bebc252a015dad8e8dae25e421db3e638b2a679450a7d5ff2736
font_01_sfnt_off0000f5bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BD 16276 bytes
SHA-256: f7fd6653468860b4c5aa31797533d03d70c4d6de3414d6a21ae46f057fd694e7

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