Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e743b5b9eb8549a…

MALICIOUS

PDF

40.4 KB Created: 2020-11-08 16:06:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 28d24e983b25dded3fbecea4ed3e732e SHA-1: 93f7861d80b7b70e5f3bc5576b4f511dfbadd7b4 SHA-256: 7e743b5b9eb8549a22cb87b751eff1f32a79a8bb7e8b62b3fdb0a714eb17d6b3
96 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files and a primary URL related to 'Spotify offline mode apple watch'. The ML_NYX_PDF_MALICIOUS heuristic strongly indicates malicious intent. The embedded links suggest a link farm or phishing campaign designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://trafficel.ru/123?keyword=spotify+offline+mode+apple+watch PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411491/normal_5f9602332c7d9.pdfIn PDF document text
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/nofezokepafepilufusi.pdfIn PDF document text
    • https://javezevefumutew.weebly.com/uploads/1/3/2/7/132740470/8217003.pdfIn PDF document text
    • https://donodofi.weebly.com/uploads/1/3/1/8/131856097/a5fdb620.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3780aca0-d1e3-4526-b36d-db360669f7da/37354627078.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/isc_class_11_biology_textbook_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/fur_elise_easy_piano_chords.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08b703bd-5c6a-4c34-aa80-c276b8dc7bbc/97369093057.pdfIn PDF document text
    • https://manetomimexa.files.wordpress.com/2020/11/lugotorizereziwatogukomak.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/kelapido.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/fisicoquimica_gilbert_castellan.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/how_guided_reading_works.pdfIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E1F 5420 bytes
SHA-256: cc1e7b97a51a1c2d9db3cc4ee9831df7569d475c1a96b71d4cdb3c7fa1143577
font_01_sfnt_off00007087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7087 10612 bytes
SHA-256: 154087979f001a29181b3310bdbc48b4d67cfcdc84c7deb222f2acec921a2077