Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc4b6c1ada873aed…

MALICIOUS

PDF

104.9 KB Created: 2021-03-20 12:02:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: fe878d2c955ed48dfd78db3f1c12f6af SHA-1: eb396da9710b82d33eb8296ea72ee1282eaa9eb2 SHA-256: cc4b6c1ada873aed1f688834ab6df110b4a647aeb9572117e6784f4dd9ddbcff
156 Risk Score

Malware Insights

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

The PDF contains a link farm designed to direct users to external PDF documents, one of which is hosted on a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/strik?utm_term=what+is+educational+leadership+ppt PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4375894/normal_5fcba77a2dfed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419206/normal_603bca5fdf530.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379387/normal_5fcd7885d7499.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388037/normal_5fc738f18484b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481406/normal_5fc63a59b56f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454049/normal_5fe728fa6a4d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466659/normal_5ffc957114e7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482853/normal_5fd9d1ed4e4b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427091/normal_6009e9aacef4c.pdfIn PDF document text
    • http://wiwajaluje.iblogger.org/40905657558.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0fc0baf9-b884-4fcd-968e-f93c0f938930.filesusr.com/ugd/68ec51_e91097a52e474bf58dbbe911446844b1.pdf?index=trueIn PDF document text
    • https://4328a374-8b5c-4134-9cef-e132ca5fc89d.filesusr.com/ugd/6732b1_63620af04a4746edaf598c28394dc045.pdf?index=trueIn PDF document text
    • https://9387bd13-3746-4408-b474-2867f26e464d.filesusr.com/ugd/ace02d_a3edd23826fc48f4941371bcb74857b3.pdf?index=trueIn PDF document text
    • https://4f65501f-cdae-4966-b9db-49b15ad9d196.filesusr.com/ugd/52b593_22a515ec0ab94c04acd6ae8f6c22faa6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/29927835495.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/befunky_new_version.pdfIn PDF document text
    • http://rimaxuzekinixib.epizy.com/continuous_broaching_machine.pdfIn PDF document text
    • http://pegowalinasaduk.rf.gd/75301628584.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/42281143968.pdfIn PDF document text
    • https://e60c805d-b9e1-47fc-b045-983511e9ac1f.filesusr.com/ugd/116bb2_385773140c4942b88135aa6054f62a17.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wakuzidi/aquatic_animals_information_and_pictures.pdfIn PDF document text
    • https://d03ec42c-8b93-48d3-a61e-9aee396c0db4.filesusr.com/ugd/1e557c_f6040941c4504e08bfcf723425056b1c.pdf?index=trueIn PDF document text
    • https://6129906d-bc82-46a7-99f5-71793a58af3c.filesusr.com/ugd/d162e3_2f3b7e613094406ea50bcc6da6f9839f.pdf?index=trueIn PDF document text
    • https://f8d82b49-d438-4da2-b906-f876cb6fe635.filesusr.com/ugd/12dc78_24133f63533e4042ac6d2a55b9a94925.pdf?index=trueIn PDF document text
    • https://3c3b6f52-20a2-448a-be11-eec5930c502f.filesusr.com/ugd/0ca786_0ac2ec3a7be74bff809970b8b4c6454b.pdf?index=trueIn PDF document text
    • 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://scripts.sil.org/OFLIn 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_off000147a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147A1 5176 bytes
SHA-256: 585f9c03c4914e09263ef2b6b09e3e14ee20c8e1d37aaf5249006a4d05a90281
font_01_sfnt_off00015941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15941 11496 bytes
SHA-256: 90ad6a57dcd69f31d6daaf56374d63111d17c150235a5123edc59d3eb9a00204
font_02_sfnt_off00018065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18065 16060 bytes
SHA-256: 99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953