Malicious PDF — malware analysis report

Static analysis result for SHA-256 5467cb202ba4db72…

MALICIOUS

PDF

45.6 KB Created: 2020-10-04 17:08:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: dfda7031cbc5c2a9b16e73b3042d1c42 SHA-1: 2493a5fd5bd26f2d8b93df0c32ce8dd7857d0248 SHA-256: 5467cb202ba4db7234b8d6f6d419cf4ba135a188ebc6dbc9eb45222c7409b5a9
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?keyword=antilog+table+pdf+file+free+download In PDF document text
    • https://site-1036651.mozfiles.com/files/1036651/40736077444.pdfIn PDF document text
    • https://site-1038759.mozfiles.com/files/1038759/jugekaxedoroxujodofudu.pdfIn PDF document text
    • https://site-1039349.mozfiles.com/files/1039349/zipiwuworujivotekij.pdfIn PDF document text
    • https://site-1038504.mozfiles.com/files/1038504/genosuvodububeku.pdfIn PDF document text
    • https://site-1036671.mozfiles.com/files/1036671/45170234888.pdfIn PDF document text
    • http://jibivos.carpetcleaningstpete.com/uploads/1/3/0/7/130738948/zikuvunowimabafasor.pdfIn PDF document text
    • http://files.trihistory.org/uploads/1/3/0/9/130969238/24aff57237b06.pdfIn PDF document text
    • http://somemoge.teamthomason.net/uploads/1/3/1/6/131606490/b759ac.pdfIn PDF document text
    • http://rumiramu.oregonsiberiancats.com/uploads/1/3/2/3/132303052/sojefig-pimemu-nipoma-febijavele.pdfIn PDF document text
    • http://nonex.rosinakhan.com/uploads/1/3/1/4/131438044/4351726.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/d285e924-9b59-4ee7-8264-0714c9807e71/wimumuwukevol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2e04a37-e5e0-467e-ad98-3848c45ab203/78174773208.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6a1ca01-0e9c-49cc-b51f-1032901c5586/35026485965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ceef6900-265f-49ab-bf0f-6bcd5cb17660/56388291590.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/184505ca-df8e-403c-a314-258fac50446d/polodoworuxura.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5e822a8-9b8e-445f-b9b8-cc7254601f63/34171524604.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03aecd12-eb20-420c-9501-e56005eabb66/ginajizoxi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C94 5040 bytes
SHA-256: 9382482f27d22b35b7878c1c914ae6a8141de65642c259e2be70c9f480b6d7e9
font_01_sfnt_off00007dcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DCD 8696 bytes
SHA-256: 5aa4de714610868264c59fdf181d6651c539371036debfb4541785a0205037d7
font_02_sfnt_off00009b36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B36 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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