Malicious PDF — malware analysis report

Static analysis result for SHA-256 11fd72eac843236b…

MALICIOUS

PDF

85.9 KB Created: 2021-06-27 09:21:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 84a6ca4130296a139cb58515cb0efffd SHA-1: f0fea866b2edbe3aa1992454135dd8c66c6bcd4c SHA-256: 11fd72eac843236b65e4c9e454ac4b8642c166767efa06dfe7ee7dde8ea0f60f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and ClamAV as malicious, indicating it is likely a phishing or malware distribution lure. The file contains numerous links pointing to compromised websites, suggesting an attempt to redirect users to malicious content. The presence of link farms on disposable hosting further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://sweetbasketsbyjackie.com/clients/864293/File/xuvevinuxomagekexet.pdf
    • http://namdolove.com/FileData/ckfinder/files/20210613_343806396EE30585.pdf
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8fafb37969---61067524477.pdf
    • https://777mto.com/contents//files/vipimetezufaruzudu.pdf
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/ltjfugss8al3b2b1un3pg4ifq2/rutiwi.pdf
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607b20ab32a32---55589342711.pdf
    • https://gachbinhduong.com/upload/file/turofebexikejekuwebegiri.pdf
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4bc86b644---doboso.pdf
    • http://jplus-ag.com/upload/files/BodyFile__60C7C116308D6.pdf
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/4j5tkg7gkar7dgea9i7jnpqkd8/33386897681.pdf
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b3f49987577---21555684055.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/8e659539039673566f98000a59dcba94/juvebananumelunamabeg.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608683f900adf---19130009021.pdf
    • https://avgdesign.com/userfiles/file/totiguriwovixedovuf.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfc9627ab4a---21405048154.pdf
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/nai88tb2qvokij7f3e5fn6gqtq/gimaf.pdf
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c942b02068---xurigemozadozosiwowipe.pdf
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b66b00a466---fewefodudugusofagi.pdf
    • https://kozhikodedeaf.org/admin/my_files/file/jedabarovoworedadav.pdf
    • http://progfin.pl/userfiles/file/luxiwuxisugoza.pdf
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089be9b4ddea---82015012642.pdf
    • https://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/dfc12h9cd63k7loc0p61ff69r1/zivavoguperarodowozogaz.pdf
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160926156a6ae0---50470211302.pdf
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/nfspe80g0oq4q3d4l1hv4vtq25/80569902102.pdf
    • http://grawerlik.pl/userfiles/file/guvidejepaf.pdf
    • http://brkvinc.com/userfiles/file/43428915037.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=various+components+of+network
    • 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_off0000ec02.bin
27c4bdfb4daac905b10b7956a809137f074bf2f44d46ab153e8f54325f6b82fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC02 10844 bytes
font_01_sfnt_off00010527.bin
9267bb26e4e14e16c2c6e12a5ce3ecee29608752f32e0b9c4494a2eaeb1b50f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10527 16588 bytes
font_02_sfnt_off00013072.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13072 16792 bytes

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