Malicious PDF — malware analysis report

Static analysis result for SHA-256 362564fa2150707e…

MALICIOUS

PDF

94.1 KB Created: 2021-08-09 17:29:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: ed3e02e21d4b545fa61e96a3d4a15065 SHA-1: fa46f981131655ed085e32c2dfb57415447d0c79 SHA-256: 362564fa2150707ec3a9ebc39a703ce018b30c0e305864562008212acd6dd876
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://juliesfundforkids.com/clients/d/d6/d6f17a7a4e9d342a12f8f8eeddb80b2d/File/42246609492.pdf In PDF document text
    • https://reinigungsfee007.de/wp-content/plugins/super-forms/uploads/php/files/divm0meml80r747lsa544pm27u/24419814932.pdfIn PDF document text
    • https://drvishweshwari.in/userfiles/file/nijedoxalazelibobi.pdfIn PDF document text
    • https://hijaustabilo.com/contents//files/mumimozifuvukemexewure.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e32e9db9ca---6861748105.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/249183b7346218fbceaa9d32baf11112/87514352515.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160d8d088477a9---nenumupexore.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160972bf3c8105---nipabewuzu.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/ea8302333d7f5af8fdde7d63f927e36d/nugezefure.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/f9f4b76f31857b344c03cb0566acdc86/25266257692.pdfIn PDF document text
    • http://mingzhicc.com/userfiles/files/47743901825.pdfIn PDF document text
    • http://stattus.com/assets/file/17591583965.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/s1pe1v21os2lb1u7maj16eil4f/63327054734.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/161078635a466f---pabosulidibizunotifebo.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5e0732f0a---nagepefezex.pdfIn PDF document text
    • http://cravaluos.com/ckfinder/userfiles/files/69324351164.pdfIn PDF document text
    • https://bompentax.com/quangbasanpham/app/webroot/upload/image/files/60925393146.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160988e2c32bc3---68084894509.pdfIn PDF document text
    • http://pitin-akutsu.com/js/upload/files/30431972552.pdfIn PDF document text
    • http://fly.no1-yes.com/userfiles/file/disalekibefemijeviwidajas.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/55f3dd339480d3255beef095ec481354/98963467842.pdfIn PDF document text
    • https://annjulieskarpmo.com/userfiles/file/zurojigumedibupev.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/aba8892a2b91c99a8af59fc17ad571be/92519120356.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/de04b38c7b92d1e95645f6e5e32671ee/diruna.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b73d552d7b---liveloso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=ejercicios+resueltos+de+problemas+de+sistemas+de+ecuaciones+3+esoPDF 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_off0001064b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1064B 11200 bytes
SHA-256: 6f25c46e7df2fbeea32434a05d6e9ffe893cc540b797bd3c229e02487db8eba4
font_01_sfnt_off00012036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12036 18340 bytes
SHA-256: 619199f8093e5eaafda454b91388d74fabb31a9424bf5feb6cfac3a5dbc4d8b0
font_02_sfnt_off00014f7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F7E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1