Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6030d4ff7846475…

MALICIOUS

PDF

90.4 KB Created: 2021-07-07 16:03:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: c80678173012d57500a2c482b48269b4 SHA-1: ae2bb8285e3d3ea7e7b2b375f4723c29c44a2d9a SHA-256: f6030d4ff78464753cb34308cd85e0ac435f0b2e620d7dfd1158e228000f15a2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, with several pointing to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://barnesfamilyre-union.com/clients/52050/File/56980272727.pdf In PDF document text
    • https://atpl.aero/ckfinder/userfiles/files/sozofosisagivesusu.pdfIn PDF document text
    • https://hansenlight.com/UploadFile/files/tomitu.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a712079e17---zedivasesixumi.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/6185d274439e063e9527f09731f44f52/22815591318.pdfIn PDF document text
    • https://mut-zur-veraenderung-hambuch.de/userfiles/file/xatefufowofugizurogopa.pdfIn PDF document text
    • https://hissekurban.com/resimler/files/gexamezanixojef.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160864fff52260---piriseporel.pdfIn PDF document text
    • http://delvalle68.com/clients/54584/File/virogovipewunuwiv.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4064e0e44---zasakudatilazapizijosi.pdfIn PDF document text
    • https://airshow-bg.com/file/80913584555.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/thscv7ivguvpqj95f6bpdv68p7/1129531511.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/66cd3d3d123b8531c5b3b1216461b944/2629242183.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bff376426e---60069818952.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/arogkk2i1esrrfv1an226du2j9/77944584458.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/186dc88344d274992e988cf958055a84/21980876123.pdfIn PDF document text
    • http://zetrade.cz/userfiles/file/kevudasimudatetisi.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/9518505c6000ce1d56f5debd84784a29/jenoxisemusuxugowawez.pdfIn PDF document text
    • http://szentistvanpatika.hu/upload/file/54720045737.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/fr0jal59dd5rl8sq0fcltvdh37/xebepog.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/37243574656.pdfIn PDF document text
    • http://dgxzz.com/uploadfile/file/12570809292.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=write+a+letter+to+your+class+teacher+asking+leave+for+two+daysPDF link annotation
    • 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_off0000fecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFECB 11208 bytes
SHA-256: 85196b15d363783ea6968cd8cbf58caeb9fc6947544bb6101f32c751af5b012b
font_01_sfnt_off000118e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000130f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130F3 16612 bytes
SHA-256: 706ef410d796017a44fc5a184da0cfb1f92486d4f2b858b4970a335d9234b94c

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