Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a214f04a8280e4f…

MALICIOUS

PDF

88.1 KB Created: 2021-06-28 07:57:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 642739e8b13f3111e91eea6dc48b2148 SHA-1: 296381a8bcb55203df1182366eae32879922e1fe SHA-256: 0a214f04a8280e4f766ba340958bc60079f1f68e048b14fea80b956a2faa54c7
176 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body is unreadable, but the presence of numerous links to PDFs hosted on compromised CMS uploads indicates a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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 https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd355a52b9---45270941097.pdf
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b76fe524db6---gonexisusop.pdf
    • https://kaptenhoki.info/contents//files/xewepof.pdf
    • https://proektasis.gr/admin/spaw2/uploads/files/fuworovasofejubepudav.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b73ad515c56---43123145649.pdf
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/5rg4bu6f3ar4rs6abou8m53tgh/12049912312.pdf
    • http://hpworld.hu/data/pic/Image/file/vabavajuzawusitexiwud.pdf
    • https://ortechindustries.ca/ci/userfiles/files/tawagupitamot.pdf
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/67eaa7e057f2ba0c7911968adc2836bd/futifuke.pdf
    • https://amrapalispot.com/userfiles/file/siwotijetam.pdf
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/h6ao3qfb7ltci5bnq4abs6su7l/buvirukamefimibu.pdf
    • http://abwmarlboropike.com/uploads/files/tibuvefutokavemun.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c973e4d0926---zopus.pdf
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/885889394df6ac2b72b0cd43d8b98845/vigir.pdf
    • https://drsubhashawale.com/ckfinder/userfiles/files/48267838573.pdf
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/9r7ok869o8n33vih33hf88k4ph/foxinututesozenekaruvut.pdf
    • http://luxe-pools.fr/i/File/51369396947.pdf
    • http://arci-mp.fr/admin/File/mirefonejavuminokus.pdf
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/c4d38bc8d119d029b1da022c93303db1/76079901737.pdf
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/cf3fa3c0c63be662d8fe176b1f9c33ef/miboledeti.pdf
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16087a6ef0dce4---8847107911.pdf
    • http://youngshiny.com/userfiles/file/1623409394.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c7504aa4e28---13427901547.pdf
    • http://omegapizza.net/uploads/files/mebal.pdf
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/irk66j4gtjeo3edo9mdliek502/dawawovemupasumew.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=crossover+download+for+chromebook
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0b2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B2 16792 bytes
font_01_sfnt_off000108c4.bin
2bdd09b8a1413a19dcf93acf1dad2948fd38bf3d07912270e4abea8c98c6af11
pdf-font-stream PDF embedded font (sfnt) at offset 0x108C4 19332 bytes
font_02_sfnt_off00013992.bin
c1fb5878714fdfeeed6f81b6f5423570b17fe793becc652822e6f4a6ac94ea09
pdf-font-stream PDF embedded font (sfnt) at offset 0x13992 10964 bytes