Malicious PDF — malware analysis report

Static analysis result for SHA-256 da10a3bed256987a…

MALICIOUS

PDF

37.3 KB Created: 2020-10-04 00:34:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e88c47fa4421de3a7ad77129b45369ec SHA-1: 348e53b000ad8ac83255360588b12932a3ae6b78 SHA-256: da10a3bed256987a879fa708ed7707a574eec603268bc676f836eb4fc577f01a
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://gettraff.ru/strik?keyword=implicit+differentiation+questions+and+answers+pdf In PDF document text
    • https://site-1038951.mozfiles.com/files/1038951/mexoxasepanazugosujokodof.pdfIn PDF document text
    • https://site-1043090.mozfiles.com/files/1043090/rebutolizibubidavirigemet.pdfIn PDF document text
    • https://site-1036833.mozfiles.com/files/1036833/14962550030.pdfIn PDF document text
    • https://site-1036671.mozfiles.com/files/1036671/makalutoviso.pdfIn PDF document text
    • https://site-1042598.mozfiles.com/files/1042598/jujetevigeba.pdfIn PDF document text
    • http://bufisigo.leadingedgeequine.com/uploads/1/3/0/7/130775826/2777809.pdfIn PDF document text
    • http://files.apeacefulfarewell.com/uploads/1/3/1/8/131856271/nuwubenata.pdfIn PDF document text
    • http://files.music2dance2radio.com/uploads/1/3/2/7/132741397/lumuxixaj.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/51e32c38-1e64-4f18-b162-1235d850273a/87181565217.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6f128ee-2c4f-49d6-b6be-42dfff4b7096/lulesid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8711b003-c444-45ff-97be-b733411f283f/sevutu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a759cda-6e98-47d2-8065-cc2b1cf3a2a7/7346583228.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/229a1a4d-d7ed-4789-996e-aebc10ef0250/55393808297.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f060001f-4f85-402e-953a-db4c68f36483/puliresemijejuduja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fb6b1a3-90e2-4cd4-9494-25e3ee13fe17/zewusabezaj.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_off000053d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53D9 5456 bytes
SHA-256: 28c1f0c8fb43dd6ca585d31ac3edb8c7f19fbf01f501c610739de1c199f2160e
font_01_sfnt_off0000665e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x665E 9800 bytes
SHA-256: 7bd469c6d56ab18a42657d2e3e0b67ac6904bcfe83c91b2a8dfedbc48443d1d4

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