Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbbef885a51f08c7…

MALICIOUS

PDF

84.3 KB Created: 2021-06-27 13:37:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9c9c98e4f35f7e481951ca0bb1b97113 SHA-1: fe2b34eb07a1fe000f403e22350918e67591b991 SHA-256: bbbef885a51f08c7d9f0118f3865817c8dc01f7d955d4f43090937f84bf7f1b2
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 an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the overall structure indicate an attempt to exploit users via social engineering or by leading them to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://kennedy-jackson.com/clients/f/f7/f78508644b517540cdb1549d93860f53/File/18619067521.pdf
    • https://condicionamentofisico.com/arquivos/file/vabowowuninex.pdf
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/deec5aba3515689bc438c96aec4d7c41/81381614825.pdf
    • http://www.look4job.gr/images/_user_na/file/womunezoliropariruziguv.pdf
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/9ce7182eb0c57a1e32c2ba01f51c9fa5/kapumefup.pdf
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/16073a222efbfc---39020623989.pdf
    • http://criminisiepartners.it/userfiles/files/26604849752.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1609da70c3a151---69530502801.pdf
    • http://romanakladatelstvi.cz/userfiles/file/wowateximajitokagu.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607313fac58e4---wugemorunala.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/a80ed9295c4ee7348a497d8fb368ee43/wejim.pdf
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/a06f091ab12bf80f893b5a8bd3cec264/torokadaxozepuxurana.pdf
    • https://balajitutorial.com/admin/userfiles/file/gupifumivevo.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b83e5b61d2---58493685308.pdf
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160928f72677ec---zajupojerogiruzareven.pdf
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1607f18c567377---74551152772.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160801a14f16bf---nuxasuvo.pdf
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/52487685270.pdf
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a075ff593ea---27446683971.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b22ffd93889---55861573814.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/c823a21e2f103c3759611645485e1837/mabunesoposesani.pdf
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b54415e1074---82534457730.pdf
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d08b0e407a---5895283833.pdf
    • http://j-line.ca/fck_upload/file/voxerokepidepodakebenu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=if+you+liked+percy+jackson
    • 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_off0000e75f.bin
89b796b3fb6bb46983ccf8d62c2e48a13cc7375e497ff0f0678df7910554588c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE75F 10900 bytes
font_01_sfnt_off000100a2.bin
819891d49b9b8d4c5684cdc1200e453d76b5616109080073f0cfb1c2e3e72a3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100A2 16820 bytes
font_02_sfnt_off00012c03.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C03 16792 bytes

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