Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0e8deac4073e93e…

MALICIOUS

PDF

95.3 KB Created: 2021-07-29 19:42:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4e3bdc7b4d5c4508b13bbd1c9187878c SHA-1: 65c5064a7e2558490c5c0d58809a4f2b74359a59 SHA-256: d0e8deac4073e93e5bade8081e4c39c8d74c2c2e916a225fe3662209d83fe650
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier. It contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://allytemp.ru/uplcv?utm_term=is+affirm+financing+good
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078b223a9eb2---89881250588.pdf
    • http://learnersdigest.org/userfiles/file/zovikuputifawafix.pdf
    • https://sindonis.com/userfiles/file/pamebazosinisoxonesode.pdf
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/48834a6405286d36c71bb8475caca27e/21839793142.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/c4d22b79a41b627409b068b1b96c2a4a/70765583824.pdf
    • https://hosvagyok.hu/userfiles/file/98636001243.pdf
    • http://rafaelokazakov.com/file/33050420286.pdf
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/a4db7c6e46214b6d9cc0285d42e1aea6/53757594196.pdf
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/da292be68ca7e22542a46f227dbe0e67/80698646674.pdf
    • https://tonymusic.se/UserFiles/files/witusilogedofawunesara.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160f99006639d2---bomeselogetaz.pdf
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/f53d6c109591c61cee3acc5556461a9b/31804241096.pdf
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd1854c682---jerofax.pdf
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/91e0c49da1f409c34a5e02205a0d498f/gunizovu.pdf
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c96d3a22c---83766859211.pdf
    • http://designklasse.de/ckfinder/userfiles/files/29014101604.pdf
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/9f2tdl5jn1dbu2l3aml8r73m93/xuvokunebovesopofolazifuj.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2aad81b04---11146426557.pdf
    • https://holocaustresearch.pl/nowy/photo/file/37829065563.pdf
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090473f62bcc---dizovafuvatuzurajisonoz.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f663a700cd1---sovadiluwegugejivatilino.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/a9573d213422cf564d432e5e5909d871/96051156115.pdf
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/uft81p2ium2trsjm12j8v89c90/jefuzesiwugozofosiran.pdf
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/d611f5cfce231ca2018eadbaf535a561/xomubakivakatigo.pdf
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606c747150114---22943437781.pdf
    • 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_off00011268.bin
357178fb216e144e0f55f51a1b775dc91f7759a834ed39920b248df377afe2fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11268 17596 bytes
font_01_sfnt_off0001404b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1404B 16792 bytes
font_02_sfnt_off00015862.bin
85651a3f43f3f86b24a4627164ea974b7170948e9b84ae8e7386c610043c9afd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15862 10496 bytes

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