Malicious PDF — malware analysis report

Static analysis result for SHA-256 19e0f01bfc029a33…

MALICIOUS

PDF

41.4 KB Created: 2020-11-08 08:43:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: e22566fefbc61b6d1faf6f5ba17688c4 SHA-1: 956a1f0f0fcf1068004b54b9c351666a93cf70ea SHA-256: 19e0f01bfc029a3390d26e99c61b08c45a4d531e17df71211b0dedbf809db2cf
66 Risk Score

Malware Insights

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

The PDF document contains an embedded URL that redirects to a suspicious domain, identified by the 'PDF_URI' and 'EMBEDDED_URL' heuristics. The ML classifier also flagged this PDF as malicious with high confidence. The document body, though heavily obfuscated, contains the same suspicious URL, suggesting a phishing or redirection attempt to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 https://trafficel.ru/123?keyword=the+ramayana+r+k+narayan+sparknotes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446633/normal_5f9f2936ce67d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409417/normal_5f96c90f2d271.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387939/normal_5fa1c8dd16f95.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/a7a8dade-85d7-4e96-8d1b-84cfd37c1996/74131940778.pdfIn PDF document text
    • https://s3.amazonaws.com/sezutuma/17791482592.pdfIn PDF document text
    • https://ganibeme.files.wordpress.com/2020/11/mevozufukinemirazapixov.pdfIn PDF document text
    • https://xelinatuki.files.wordpress.com/2020/11/12873235441.pdfIn PDF document text
    • https://nanopitozute.files.wordpress.com/2020/11/14404384068.pdfIn PDF document text
    • https://kebupud.files.wordpress.com/2020/11/16674380217.pdfIn PDF document text
    • https://pokagiriti.files.wordpress.com/2020/11/charlotte_princess_and_the_frog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61259f0c-7a25-4f3c-9fb5-d76bc3b7c588/82259164161.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_off000065d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65D6 5144 bytes
SHA-256: af49aea9106704bbaf6318a0daddece71da987f0bb5c93e6c45d484aae8b8d83
font_01_sfnt_off0000772e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x772E 10168 bytes
SHA-256: 1433968607bc494e8f11d1bf18e0ac994b1bbcdee5369ad38c20b867b4764daf