Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e67e29d1569e2cf…

MALICIOUS

PDF

75.2 KB Created: 2021-10-11 12:26:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ba7c76d5a704f8da8bf348be3008a9e6 SHA-1: fceb05e57f835eddd3aaf531cb36c87f7fa71c0c SHA-256: 9e67e29d1569e2cfe797a811d8a3d78159a12af13d55d6eb4a8f21ed69bf418f
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and other potentially malicious domains, suggesting it functions as a link farm to distribute further payloads or conduct phishing. The PDF structure and embedded links align with common tactics for spearphishing attachments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1615908371fae3---kuwetenibopobesem.pdf In PDF document text
    • http://xinchenfast.com/upload/file/wovadusabuli.pdfIn PDF document text
    • http://satit.nrru.ac.th/satit/_Adminis/ckfinder/userfiles/files/7513121180.pdfIn PDF document text
    • http://www.web-globus.de/ckfinder/userfiles/files/44992148971.pdfIn PDF document text
    • https://247christianity.org/fckeditor/userfiles/file/290295248431631572343.pdfIn PDF document text
    • http://taispacedesign.com/upload/files/gogomagenaxitop.pdfIn PDF document text
    • https://ls-machinery.com/uploadpic/files/202109161717062933.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b13101cb25---kotafarabapaferifogi.pdfIn PDF document text
    • http://open.ua/uploads/ckeditor/files/xijilizugaf.pdfIn PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/46442794721.pdfIn PDF document text
    • https://bike-accessories.supersites.gr/content/ckfinder/files/63647300219.pdfIn PDF document text
    • http://balade-pierry.fr/userfiles/file/55328447298.pdfIn PDF document text
    • http://kimhoatra.vn/upload/fckimagesfile/31870074638.pdfIn PDF document text
    • https://mgc.to/sites/web/upload/files/lapakiwuvotodaferaluna.pdfIn PDF document text
    • https://francois-daulte.com/ckfinder/userfiles/files/19255018151.pdfIn PDF document text
    • http://www.dialog-seversk.ru/jsplugins/ckfinder/userfiles/files/48650998415.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161349d984c076---wewudazilamigotutogi.pdfIn PDF document text
    • https://dernek.daynexdemo.tk/upload/ckfinder/files/82546616331.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/t9ke8lbd94ia001gp6o6n3tqjt/70517189061.pdfIn PDF document text
    • http://vodova51-53.cz/files/37426702001.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/986ab43901e91ffa1948c5a44713338f/62679809910.pdfIn PDF document text
    • http://tctrack.vn/images/newtech/files/jovorunigovukimolumim.pdfIn PDF document text
    • https://desense.eu/uploads/wysiwyg/files/65369601062.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e5178b9e57---givumejisavugifidasolozul.pdfIn PDF document text
    • https://textosl.com/upload/editor/file/tivafifajemulawo.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/xPAns0MRe5M/uplcv?utm_term=reason+of+typhoid+in+childPDF 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_off0000c114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC114 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD926 17388 bytes
SHA-256: f9290838d3833e09a144aabd0a94a2f68f65ebb78e87f49501e4d82af20cb111
font_02_sfnt_off00010644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10644 10776 bytes
SHA-256: 89d0356fc57c42b6620f34c5bb5640623b0b68c76f218436a4c0a263e64e9ecc