Malicious PDF — malware analysis report

Static analysis result for SHA-256 057afb7a1da92fe9…

MALICIOUS

PDF

89.3 KB Created: 2021-06-27 02:14:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e2a5899b6a7532a9e14f23043aa37d1a SHA-1: 8841c4e64f6b27e3ccedd3e60134d901108beb93 SHA-256: 057afb7a1da92fe92c1233a9ba070870dd696156ab3cf8b56062eb89164eb306
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and numerous links pointing to compromised websites, suggesting an attempt to redirect users to malicious content or phishing pages. The presence of embedded JavaScript indicates a likely intent to execute malicious code within the user's browser or PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://medvor.ru/uplcv?utm_term=stormi+travis+and+kylie PDF link annotation
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074bb1f4abcf---gofatuxalati.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/00d7d34813bb862180c7694fff0cbb23/64927220830.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160810e01d37dd---nomodu.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/kexelinavirus.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/demav.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/252c4c2a1c6722a045df3328d15037c8/74144434332.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/92083c7ff48985c3175cf6007b312e7d/zadusakofedidixatotabo.pdfIn PDF document text
    • http://outspokenholland.com/userfiles/fckFile/20210515202653.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/ea2b40c23f67cd975e908559381829e4/44104241734.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607098a38de14---savagun.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160824753f13b5---9236593193.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16094cb8a5e9bc---14097117435.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/sl4kv7rdptahvqutlvf59ri3b0/48898450528.pdfIn PDF document text
    • http://www.rotudavid.com/ckfinder/userfiles/files/73124767828.pdfIn PDF document text
    • https://isosklo.cz/uploads/mazaxezaperu.pdfIn PDF document text
    • https://morabia.fi/images/file/xezimoluban.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/5c0b32120d37381f59e377141ea8ec7e/32403999252.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc239246e5---sotad.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cec6baec02---juvare.pdfIn PDF document text
    • http://ofipapel.org//ckfinder/userfiles/files/ninejemitatesupigilon.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/220f4212d314c73aaf145e36f9535bae/32450551902.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/fe824a9a2fa316c98b587e51dd792ec7/tidepejiseni.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/7b587e51e051c73917cb4e47623df121/42798559338.pdfIn PDF document text
    • http://empezo.xyz/js/ckfinder/userfiles/files/52162853075.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/1e71666919863bdabcd4b1a9c297bd64/30996139418.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_off0000f4aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AA 10756 bytes
SHA-256: cf9f47a28579e61b85b4171e1f46700aff4412adfd650fc055ae22ccab972c88
font_01_sfnt_off00010d67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12579 18904 bytes
SHA-256: b4e2ae02a6fe51e1e2dfc45a2a4cb1661151e5bbee0f406c6193948bcebdfb08