Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5ed030b752bfdc9…

MALICIOUS

PDF

86.0 KB Created: 2021-06-29 01:52:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e5cf0327c4af90bd82109731fa025b2c SHA-1: c87083610de3a90371db3ecac36f2d053e5880e7 SHA-256: d5ed030b752bfdc9e1ff1b1958a6c3d3ca48cfd305f18c89192fd427e9eaefd0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous external links, many pointing to compromised WordPress upload directories, suggesting a link farm or phishing lure. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of numerous URLs and the nature of the heuristics point towards a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://drafthe.ru/uplcv?utm_term=ftse+100+gainers+and+losers PDF link annotation
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160897a9eb818a---wufaxulolesurom.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608042297628d---62854319381.pdfIn PDF document text
    • http://www.tomasjelinek.com/img/pub/file/21302418367.pdfIn PDF document text
    • http://au-coeur-du-temps.com/userfiles/file/bozaxeme.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b3910cd11b1---ledefavelamifuwuramut.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/72737349847.pdfIn PDF document text
    • https://diphong.com/uploads/fezirope.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/121420138649.pdfIn PDF document text
    • https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4c5b6eae1---22243708389.pdfIn PDF document text
    • http://velocimapper.com//webfiles/file/noxaxaxugivodasuloseti.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccfab49089---kugusefunuxaburimujuruz.pdfIn PDF document text
    • https://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/6ce3d1402479ea32f528b344aebba2a5/92056145534.pdfIn PDF document text
    • http://gleneaglehoa.org/images/file/gezoxumovisegavolew.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16086a49728072---72635364513.pdfIn PDF document text
    • https://samngaimarble.com/html_upload/file/64658455531.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607078f84b2c0---banigutefituluzam.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/2ad44b02d8e76bc74d88754bf2cba6d1/47603221569.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072c4b757445---vanegapujej.pdfIn PDF document text
    • http://bisenzia.it/userfiles/files/paridowewisojix.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b092bb2fc8f---67052249655.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca5be0cbca---fafizijajitonuriwese.pdfIn PDF document text
    • http://fondationmonetoile.org/clients/0/0e/0ecfe6182781ff486fe5156d2e85c11d/File/29502404328.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beaf506261e---72590609195.pdfIn PDF document text
    • 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_off0000ec53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC53 10576 bytes
SHA-256: f36b79f1fa61ef75c8e515b87eb84948a0d07f21d3392f3d717d1bd8ca5ec1fd
font_01_sfnt_off00010466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10466 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C78 17600 bytes
SHA-256: 515fa5c8847dfed56a4da66f8b61befebec8bba401b59e54a5e7cc79d60a7c8c

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