Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0d20ee1834c6b06…

MALICIOUS

PDF

86.1 KB Created: 2021-07-16 03:41:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a002d92758e3c59400aae8df0745339e SHA-1: 95571a878673889d961ea4cc2f3071c5786fa34d SHA-256: e0d20ee1834c6b0620ed44a7586cf818103a7807deee5e23c5331093ee8b565d
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, which in turn host other PDF files. This suggests a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving exploitation of PDF vulnerabilities to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://mtprospectbaptist.org/clients/7/74/74f10a8404da00fab064704771972c19/File/33653353512.pdf In PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/4770c3a512510c9b5db359d64b32f012/gudofokixakisija.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/e4dbd7f8a35b8965c98b4abfb32b44c8/vesok.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/cfv20b63bndkn9u6664snjcmq4/16852506342.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607577f364bc9---34589843272.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/a7176c857d0a21d7e2a3c3077d1eaaf9/12799349983.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/6d76750e765978ee844b43da697f145f/xupedipovonixakoxabelopul.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/uf772kgnv4ao1sp4r710j9rbi2/pufutijuvowijunidefivod.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/amq5obfrbh7mmhf5kpii2kimp3/72619016790.pdfIn PDF document text
    • https://easy2ticket.com/upload/files/32344656596.pdfIn PDF document text
    • https://mobiligennari.com/userfiles/file/65320975165.pdfIn PDF document text
    • http://ricarda-allegra.de/userfiles/file/62931733019.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c9d8166983d---38214670416.pdfIn PDF document text
    • http://megaprestige.ru/uploads/files/kanokikigeruruz.pdfIn PDF document text
    • http://singlesync.com/userfiles/file/49111934118.pdfIn PDF document text
    • https://dalilak1.com/userfiles/file/gofowajojoj.pdfIn PDF document text
    • http://kasargod.net/uploads/file/34684795466.pdfIn PDF document text
    • https://oglethorpeclub.org/~oglethor/UserFiles/file/xironesijo.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/16094c52e61db9---25555184991.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e3780e503f---33441592171.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/a4vd2oc6sqa4a0lkre54566uq2/1918082984.pdfIn PDF document text
    • http://allycatering.com/userfiles/16431661137.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=rotate+specific+pages+in+pdfPDF 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_off0000f024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF024 10692 bytes
SHA-256: 48cb20cc1bbc543ed49d7aed8623b88379fe32a4c593d68337adf3582c5b48fd
font_01_sfnt_off0001089f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1089F 16332 bytes
SHA-256: aac73e96a9bf86f5b4306821b9d51f36003f36fe7d48e94c24ce57a03386be29
font_02_sfnt_off000132f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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