Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f484f93dfb1894d…

MALICIOUS

PDF

83.7 KB Created: 2021-09-02 11:07:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9f9b5b15b17f064f11057ac80bf6ebfa SHA-1: dbe5105b0e0f870df643350919ee27eec290c60c SHA-256: 1f484f93dfb1894de2b02cef8ab55c7a1f03ffb27cbc03f1bf777e847e676d4c
176 Risk Score

Malware Insights

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

The PDF document impersonates a cloud file-sharing service, a common lure for phishing or malware distribution. It contains numerous links to potentially compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the distribution of a phishing payload or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/9a4d82b850a5736747bd102514f5628c/85513507303.pdf In PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe8d2a144d---wutasag.pdfIn PDF document text
    • http://shengyaweb.com/uploadfile/file/2021080718065419.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c96f46271e2---xibuxeza.pdfIn PDF document text
    • https://carparts-fixture.com/file/file/bujobiwajutizosot.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/49939074320.pdfIn PDF document text
    • https://circolodelpistone.ch/userfiles/file/4082423986.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b08ee08316c---81402268801.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/b4483747b3be0f2e049161ec6265ada6/92228143400.pdfIn PDF document text
    • http://easternhoteljeju.com/FileData/ckfinder/files/20210620_1ABCD4E17FBC3603.pdfIn PDF document text
    • https://lasanisports.com/files/nozavawono.pdfIn PDF document text
    • http://udelimpa.es/ckfinder/userfiles/files/bodow.pdfIn PDF document text
    • http://vaonhaphatphap.com/images/uploads/files/pisumafuwezugibuwex.pdfIn PDF document text
    • http://vervesimuhub.com/userfiles/file/48775826867.pdfIn PDF document text
    • http://gestaocipa.com/public_html/Imagens/file/46923464984.pdfIn PDF document text
    • https://livredart.com/ckfinder/userfiles/files/77561890875.pdfIn PDF document text
    • http://shsuorui.com/uploadfiles/fckeditor/20210725/file/16272270634077.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606c78cf8291d---12841649168.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/12f4e6fbaa9699f01789fc0482e6720a/ponuzuromepemetagudaw.pdfIn PDF document text
    • https://govox.co.uk/wp-content/plugins/super-forms/uploads/php/files/p2lft22tgd3mpc65ntv7atkp9f/nugosuwesexanewefiv.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/2n202jd1f53oma4v8p3tie17f5/nufiw.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/ed1a5kkq52giqhib2vsjh4o75v/jowiwokisukajuwekajer.pdfIn PDF document text
    • https://costabravas.com/uploads/localidades/files/12111931786.pdfIn PDF document text
    • http://rowsontw.com/shopadmin/upload/files/28074316379.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=everything+everything+pdf+google+drivePDF 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_off0000e3ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CE 17284 bytes
SHA-256: 4faeb4e807ff987952c91db7cc2504e6f8fa1f908870c8fa382a4e900de2ae3a
font_01_sfnt_off00011075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11075 10608 bytes
SHA-256: e08eea4cc3be8605b21a06d67c21f4a4e6dd36728dc5c127ada51755dd7dda45
font_02_sfnt_off00012861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12861 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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