Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ee27320fe38369a…

MALICIOUS

PDF

122.2 KB Created: 2021-07-05 13:49:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 536d6f34af6dbd5d0ee57725313629ba SHA-1: d9cde5d23c1bc26fe76e2b96b3ec245dfb5a9314 SHA-256: 3ee27320fe38369a966e50d93be24f07efc1d8c12013bc29567fc0693dfebb5a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. Heuristics indicate the document functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. The presence of numerous URLs suggests an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/konosenuzeritifexifuwik.pdf In PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbba4d1ffb4---59737424564.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160ad28043c525---54563262225.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/9197437717.pdfIn PDF document text
    • http://klubalfa.org/img/userfiles/file/kaxinoralogewamibetebuf.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/19f52fb2f9f6fe5697f0001f9c1928cc/95351820095.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/tesadusazasojew.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/a1a02c430b2472bfd2037e7ac890f6a9/topolu.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/99827680056.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/7328c3615a0bec1ec05ffc2b7ea4f701/fezesiluruv.pdfIn PDF document text
    • http://rosswellbulldogs.com/clients/b/be/bee1e50a814ad4ba40998340b8964064/File/69994857286.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8312c2c04---dadajoxagujuzidowazibutok.pdfIn PDF document text
    • http://chromatographvials.com/d/files/jakutixoserusazamale.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/vilegiju.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/774d89556cdd4990e28835d58bf4e635/zokakufumuwupivu.pdfIn PDF document text
    • http://brukbet.com/user_images/file/71702671397.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160df99c98e8f7---96652537533.pdfIn PDF document text
    • http://shopexpert.com/app/webroot/files/userfiles/files/wudufud.pdfIn PDF document text
    • https://cissud.eu/uploads/ck_editor/files/45477772508.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/1paof1mv1on8lj8e3u2post57a/topuxov.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/a04c2939e6d6c83f92b0343bca46f0d1/11843724587.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c66a6844ff9---33697126372.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/zogum.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/de39d0b065a889e7dda458b04f2a61bc/jarisixun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=sartre+being+for+itselfPDF 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_off00017bae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17BAE 10604 bytes
SHA-256: 1514ae7a7eba3c65fb4aa0acaa71e712f060a1a696f5fcb3e7ec8924657bf5a2
font_01_sfnt_off000193fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x193FE 17952 bytes
SHA-256: 7d21919de31b20081752e9101d132e32895002cc8ab44a903a62c84c18696643
font_02_sfnt_off0001c1f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C1F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1