Malicious PDF — malware analysis report

Static analysis result for SHA-256 147644fec9380693…

MALICIOUS

PDF

92.5 KB Created: 2021-07-26 23:17:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d0a11e3404229340cb3326fb0713fb53 SHA-1: 789bf230dcaca80f7e432d5d0a425f3ec3bcb35b SHA-256: 147644fec93806939577f6a4de0a5f74a536b4d6b1a7e4274677f49aa885dcf9
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, including ClamAV and an ML classifier, indicating malicious content. It contains a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of external URIs and the overall structure indicate a likely phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 6

  • 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.
  • 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://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/33d5906b77a126939c926dbfcb88644e/jibiroguxafusi.pdf
    • http://adria-ex.com/images/blog//file/40647965018.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fae1bcea51---35089898331.pdf
    • http://cnex.cc/images/blog//file/zozulutakerajitil.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/a650e1f1e01d031ac534ee30997c0d94/wosasavagepanomabu.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/7af5c688108383aad92e7e76ef14801e/pepitumisutegogap.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606e6f25bf3e4---44839930103.pdf
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/40c8eac69d81afced67bed5cf19a0be4/85838614852.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a52b3a34c10---67842293921.pdf
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/652ec32b081904a9a797de188dd0573a/5926156132.pdf
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/846ab6340456da2f09e64b0e651616d6/tizumapok.pdf
    • http://bmhs71.com/clients/c/c9/c97ff408e01126d63256cf68004d6641/File/gadixalekel.pdf
    • https://blnk.eu/userfiles/files/1575163534.pdf
    • http://toeicspeaking.net/_UploadFile/Images/file/waxozeg.pdf
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/dfaa5dd4d4c421935a8e9fefa53c1129/bojunabunalodabovi.pdf
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d98de4b894---wivaxodefadurobavamegaka.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ofgqc93ig37vjrq041malua6m1/73701182495.pdf
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/mj9ekngo88fmcp6mer9dtr4hp1/tizorozixegopekopesola.pdf
    • http://ilsogno-bomboniere.com/userfiles/files/gagirilifibo.pdf
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/0c91d39424eb51d4c573fefcb60557f0/nujiwejogewanusabifarulag.pdf
    • http://capitalclassof1970.com/clients/e/e7/e78cae7b17622b0161c193cbd63f4fd0/File/46892247488.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5899399a01---46897959387.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c9f158b88---sivixamododutekolona.pdf
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/a9607f28b979a2ea7889429021961bdd/72854907320.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=cuales+son+los+sintomas+de+acido+urico+elevado
    • 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_off00010574.bin
c8d887a941611e0b26a79d23e1d6b5738d8c68a4d5d344ce075fe7b8247490e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10574 10728 bytes
font_01_sfnt_off00011e1b.bin
5d0a4933427d8b3c56c427febe7e4bae31d9cf383e5673722c67c31d749adac4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E1B 16888 bytes
font_02_sfnt_off000148ce.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x148CE 16792 bytes

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