Malicious PDF — malware analysis report

Static analysis result for SHA-256 300429d1dff8e275…

MALICIOUS

PDF

73.1 KB Created: 2021-09-04 05:01:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 416cf8e68b28037aa1b64248fd7f7fed SHA-1: b3206b74b6c87d0884e31ba354909bb2ad9c7398 SHA-256: 300429d1dff8e275d067688a686c274b6397400f6ad2f9d111012d69b6854a5d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external URIs, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://ketchas.ru/uplcv?utm_term=gmat+official+guide+2020+pdfdrive PDF link annotation
    • http://medob.org/SITE/files/editor/file/mugexurifubebujub.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160d358cd9aa8e---7173673214.pdfIn PDF document text
    • https://ipekyolumedya.com/resim_galeri/file/76321840686.pdfIn PDF document text
    • http://surrattsville69.com/clients/8/81/8122276c22396d7fa0996010cc369f50/File/9760065544.pdfIn PDF document text
    • https://strategieb2b.com/userfiles/file/fapetosu.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/6d12bc1d23972c63e995eed13d03be84/dugimesenumofasewomilujos.pdfIn PDF document text
    • http://solarissoft.com/img/userfiles/files/pofisekamow.pdfIn PDF document text
    • http://kulturazebrak.cz/userfiles/xuduk.pdfIn PDF document text
    • http://teamhead.net/userfiles/file/jelepuzuzejililaje.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/161296df1a7c8d---favinefegirefufikefulu.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/o9ja4vq1q4om4866761f6rv7fn/14427098353.pdfIn PDF document text
    • http://paulsaperstein.com/userfiles/files/46968930493.pdfIn PDF document text
    • http://zeminyerkaplama.com/upload/ckfinder/files/xumaf.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/08f181e05713417509a9c9d044d96076/81760960567.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/88eae16d2dc93779a7aad485b19f0e83/wogisebifipamanow.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/73923081204.pdfIn PDF document text
    • https://fokusmedia.com/images/uploads/wujurobopiwaduw.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c3de103e8e3---4564976815.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c12d7280219---toxujugajatir.pdfIn PDF document text
    • https://songhong-thudo.com/img/files/solarotiwat.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9ad6a1f23b---fugolubapijidoweferilifi.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_off0000b75e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB75E 11140 bytes
SHA-256: 760e563226a38217a18b047c9080573d66ec1289923b8c0aeed38a3092a9a0a8
font_01_sfnt_off0000d146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD146 17788 bytes
SHA-256: db986303476030a25217a550872c54332fada83cabc098b2ea4aa561a8ea79a7
font_02_sfnt_off0000ff1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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