Malicious PDF — malware analysis report

Static analysis result for SHA-256 e60e5fb40677ec40…

MALICIOUS

PDF

100.8 KB Created: 2021-07-13 20:35:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: f0f006b0eb0f1356efc6892bfb8d4374 SHA-1: d32d75818b0a52f4110c025f5ce6d39d2031b6e6 SHA-256: e60e5fb40677ec4011a33709c698e9397a85045d3b1b2d25a10cce7b7702c166
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified the PDF as a link farm pointing to multiple compromised WordPress sites, suggesting a phishing or malware distribution campaign. The embedded URLs are likely used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

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 http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160796b701a7a2---torosaxitudenaw.pdf In PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e3a25204044---felivevulasupimepuxubav.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/7qpc7929afb78mperuurchge45/vafelu.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/ih9a1mc4gc77cep0ujlnolrem1/24788072392.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/63768a45d88d7663eafcafc71646d562/33187982786.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3b54c1830---dolugoxesa.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7c03dab42---xalomatigafexuzemiwujowo.pdfIn PDF document text
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/6c50207139e3004eaf20c0a37a2505ae/77517523410.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090302b52eac---86023413355.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/11343775826.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/rovobukusafexunusabaleja.pdfIn PDF document text
    • https://activepymes.com/pub/file/36436194984.pdfIn PDF document text
    • http://daivupaint.com/img-chamthi/files/97215066328.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4c9798e50---59153900027.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/nepijobomagusanaxonudo.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/8qp59fif55n8j6a9m2vgc7lujn/75387425900.pdfIn PDF document text
    • http://cdmvt.cz/sites/default/files/fitonazagakapipol.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ced87ece20c---15472598698.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/259ea63173a8d4fb6c3e26329318a423/kedemopelaved.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/b0401egdnj0uorc9qg76fqqc27/selewiroxitanena.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/2vhjk8c4pcssj4knqi4r9o1eq3/sagefigukale.pdfIn PDF document text
    • http://monroehighwildcats.com/clients/40160/File/8323824659.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=sooth+meaning+in+englishPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000151e6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x151E6 27876 bytes
SHA-256: acf4cd844bd1dded8aabbcb7aa2d141861d7bde6ffed1ed35c28ccee72470cc1
font_00_sfnt_off0000f0c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000108d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D7 10532 bytes
SHA-256: 00f339e565161fdc4b6e5fc9c74c8ed6b52e6aacb078bd727d1c7857f7dca9cf
font_02_sfnt_off0001209e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1209E 18860 bytes
SHA-256: 89f9b023977b443f5cec90cafb8384bb247140c075ae9d2c9f4a22a2a8bb26e3

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