Malicious PDF — malware analysis report

Static analysis result for SHA-256 e93fa1eaeedf1c6f…

MALICIOUS

PDF

81.8 KB Created: 2021-07-01 21:55:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a733678d87c6d074579b4b73f4de78c8 SHA-1: 7a8e6d433fb8eacc67f195cda132bff408d57c44 SHA-256: e93fa1eaeedf1c6faedc921a389d495ab6270c025b3fbc5458e7a51de4b92898
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised websites, likely intended to trick users into downloading a malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with phishing and malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://roycraft.ca/userfiles/file/zopamu.pdf
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b6f50c210b2---18092872966.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a0beea9b7d1---53825588323.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607831b5bc92e---jekipagazedox.pdf
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/e6c0e263b5537ab4e72180b4c47eceb5/7207899018.pdf
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1f8cb3cbf---76666279950.pdf
    • http://aclamerica.com/customers/CMS-IMAGES/file/90049545763.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e953fc41b8---85597496450.pdf
    • http://amdind.com/userfiles/file/1467239866.pdf
    • https://gachbinhduong.com/upload/file/84361804022.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607650e7b55b4---kaguluxupusopusiwawajux.pdf
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a51c6279c23---paliwovirigamijasipejel.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc20d9d26c---ranigononofe.pdf
    • http://www.sec-ollivier-associes.fr/www/upload/file/xoditinumujuwategudimi.pdf
    • http://allamericannursing.com/userfiles/file/venasunemedizulefadavum.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a16c343a890---risebolug.pdf
    • http://katachizu.com/img/news/files/58414423945.pdf
    • http://meble-tk.pl/userfiles/file/38711203477.pdf
    • http://filatelianumismaticaumbra.it/userfiles/file/warofesikeriza.pdf
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/fef4e592d55aad5e13ee7f3532eb27c7/resefeke.pdf
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a03c4ba6a51---27257333777.pdf
    • http://bukharaalpharetta.com/sites/default/files/file/57218878201.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=riddle+what+has+keys+but+no+locks
    • 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_off0000dd59.bin
313c15f3504c6d2b5b2553d059b503eaa185c96f56593ff2598edaad59ebc4aa
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD59 16652 bytes
font_01_sfnt_off0001089a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1089A 16792 bytes
font_02_sfnt_off000120b1.bin
6c2cac9aafcaecfc743a52484c42d6e233efa45a4059d03bc05265f61ffb3c27
pdf-font-stream PDF embedded font (sfnt) at offset 0x120B1 10944 bytes