Malicious PDF — malware analysis report

Static analysis result for SHA-256 69f258b81f85a9cd…

MALICIOUS

PDF

85.3 KB Created: 2021-09-01 05:52:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a4d49b1b3caad4a1ff7043ef74ee9723 SHA-1: 9a83224bfe09d08670b2715c5bbae9276b0e60ae SHA-256: 69f258b81f85a9cd56e4fddf4cc1cdcbed1a0081a876243699bc3d25417759bf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous URLs pointing to potentially compromised websites, including those using CMS upload functionalities. The primary purpose appears to be directing users to external, potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/16078c3353e572---bolozufeduper.pdf In PDF document text
    • https://chp-travel.ir/data/file/wilizofamakoba.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608073945ccee---lokorixus.pdfIn PDF document text
    • http://placc.info/up_image/dasonadulodatezenosirero.pdfIn PDF document text
    • http://ewhamd.net/upFiles/ckeditor/files/43333619600.pdfIn PDF document text
    • http://ciarajewellery.com/editor_upload/file/29345882783.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/7d1d202803803652d82f49f00b8c9233/gesev.pdfIn PDF document text
    • http://popmetre.com/news/files/mazumazelamevigusetimo.pdfIn PDF document text
    • http://daedukgs.com/admin/fckeditor/data/file/20210609090235.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/qgoc83redm6i2h7f9ac4vjogre/90620110714.pdfIn PDF document text
    • http://schmetterlingsgaerten.de/file/bamalidixosufefudux.pdfIn PDF document text
    • http://bk-plus.at/userfiles/files/15646042632.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/1bfb94g633cdm5mco51mkuvoj4/wipus.pdfIn PDF document text
    • http://topenglish.sk/app/webroot/gallery/files/zivijibunex.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/dd8f853cb202619d17ff3287932171bd/32169549014.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/50bbccda503e1693b0c650120658c21a/39324866546.pdfIn PDF document text
    • http://centronegozi.com/public/sipadome.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1612c7fadefd8a---sisexonobitodamakex.pdfIn PDF document text
    • https://guapa2.com/admin/fck/file/vesiwidisepizus.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a5596fe01---69853177673.pdfIn PDF document text
    • http://kalikraft.com/images/file/28530270195.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/068e9199b74e8b346f33c58f4779c1c3/26257121248.pdfIn PDF document text
    • https://raiporjai.com/piceditor/file/98476918169.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=snapchat+face+merge+filterPDF 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_off0000e816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE816 10716 bytes
SHA-256: cc6a95b979e333db65198100a4d346a8387660913b6dbf312e01c60b71f66f11
font_01_sfnt_off00010077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10077 17684 bytes
SHA-256: facbc7fbba24382881057417f036d8abc57cac79658e80aa601808d93580ebf3
font_02_sfnt_off00012de9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1