Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0b5e04b494e019d…

MALICIOUS

PDF

81.0 KB Created: 2021-09-21 00:03:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: efb0a802adb4d42cf765d6649bcf6ef8 SHA-1: d993df5ed8ca30c0bec7f52d8ff3eba88e598301 SHA-256: e0b5e04b494e019d60572a9029d7830d1e27f8f6b73c8abe13381a2ba670d6fa
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, a common technique for executing malicious code or redirecting users. The file also contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution attempt. ClamAV detection and ML classification strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • 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
  • 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://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/161304f174bc7e---70567895631.pdf In PDF document text
    • http://nassagroup.org/app/webroot/js/ckfinder/userfiles/files/31269879709.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/bc7a2e69d3276b7309eb0f24cea6bfc0/6026284870.pdfIn PDF document text
    • http://skupka23.ru/upload/m/xuwuvebafimejisuwobuwedel.pdfIn PDF document text
    • https://dp-engineers.com/admin/userfiles/file/89707419925.pdfIn PDF document text
    • https://euro-m.si/web/dokumenti/file/murisudone.pdfIn PDF document text
    • http://jinanxintiandi.com/userfiles/files/58561789518.pdfIn PDF document text
    • http://land89.com/ckupload/files/95706292627.pdfIn PDF document text
    • https://escolaalfa.com/userfiles/file/41467575040.pdfIn PDF document text
    • http://liga-stf.ru/i/upload/files/nikajiwamowubeza.pdfIn PDF document text
    • http://0851gay.org/userfiles/202109file/2021090515443470554.pdfIn PDF document text
    • https://mudrun.com/home/mud/public_html/ckfinder/userfiles/files/29182051142.pdfIn PDF document text
    • https://suprizpin.com/calisma2/files/uploads/tazitopidasajunil.pdfIn PDF document text
    • http://compow.net/ckfinder/userfiles/files/2409976459.pdfIn PDF document text
    • http://norrlandet.se/userfiles/file/29219885947.pdfIn PDF document text
    • http://bamboomfi.com/htdocs/cljr/data/files/lukolinagazudeviserad.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/17ea85923f4466d39a8e8c8791cfd984/17330287797.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/ab4f49cb78cba124439bfeb1a339837e/43250450700.pdfIn PDF document text
    • https://businesslife.com/content/file/14223869689.pdfIn PDF document text
    • http://coffee33.ru/archive/file/27138265085.pdfIn PDF document text
    • http://janaturismointegrato.com/uploads/file/52067214669.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144758c6974b---gabosewajujisuma.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=the+secret+of+the+fairies+pdfPDF 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_off0000d70e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD70E 18300 bytes
SHA-256: ceb095fac79c5100b78f7edc6ee40ef0876e27489ab1e255038a8333aca7686e
font_01_sfnt_off000106a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011eb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB7 10528 bytes
SHA-256: 0586a92ae2da8e3259e6ee4a06d12083d380b06d241759582b56452fe1f28f7c

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