Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e205c2ab046e083…

MALICIOUS

PDF

67.9 KB Created: 2021-06-23 00:44:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 058efb54bf09d72506975519926a1632 SHA-1: c8711bd958d4316a3a7c491e76b1a5ffcd64f879 SHA-256: 6e205c2ab046e083a98146673ffbdff5ea0a8fbf750009ef6c4f3bb1024d23a6
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document employs a cloud document impersonation lure, attempting to trick users into accessing malicious links. The heuristics indicate a link farm hosted on compromised CMS uploads and disposable domains, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest it is designed to lead the user to download a secondary payload, likely exploiting a client execution vulnerability.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9782

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://philabc.ru/uplcv?utm_term=how+to+unlock+pdf+file PDF link annotation
    • https://atphp.ch/userfiles/file/19370242365.pdfIn PDF document text
    • https://karpzbeldowa.pl/uploads/userfiles/files/78139741238.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609b874315656---84542936249.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160d24f8ba983d---favafaru.pdfIn PDF document text
    • https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f02faafe43---47717739989.pdfIn PDF document text
    • http://www.halpellet.hu/userfiles/files/47004211644.pdfIn PDF document text
    • http://dzbnf.com/upload/file/%5C/lowaw.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/c0e89aa69eb2d79448a4ce52171bd76b/nidaneguwi.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/s8igss1aa1vv2fhbe3eidigm66/30369722265.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae635d0eed7---nugazojoponelona.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/90415948897.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/o0gvqgj8v9mqmd4ba1u117mj5b/506497061.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090b93f19e98---kurumuvag.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a1dc8c9da8---xajerokeva.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD674 4780 bytes
SHA-256: beda3d88eb0dff0557a0aff787541033bb3c9067c7dcb387b72eb42e0bf85006
font_01_sfnt_off0000e6e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E4 10460 bytes
SHA-256: f47b499841db990ecd68e8c5e17ac70e4384735223c68b7cb1564762e69b58bc

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