Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b6040b458321162…

MALICIOUS

PDF

56.0 KB Created: 2020-10-15 07:34:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 099061d56e12c30fdcbfb562ea8fd5ab SHA-1: 89bf0a78b3f6b828c4a6ce2c24112d06bc608710 SHA-256: 4b6040b458321162c20d4ca2f38d28498b5fda46bab2a85913716dc745dd5d33
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/123?keyword=hukum+newton+2+pdf In PDF document text
    • https://site-1038728.mozfiles.com/files/1038728/27571426828.pdfIn PDF document text
    • https://site-1040383.mozfiles.com/files/1040383/narogerogixawifujib.pdfIn PDF document text
    • https://site-1039303.mozfiles.com/files/1039303/gibojubixa.pdfIn PDF document text
    • https://site-1039505.mozfiles.com/files/1039505/14830115329.pdfIn PDF document text
    • https://site-1038710.mozfiles.com/files/1038710/76373860952.pdfIn PDF document text
    • https://dosedupuwosiwoz.weebly.com/uploads/1/3/0/7/130776272/6837461.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/naforinijuz-bujidogufolumig-xideleluveruda.pdfIn PDF document text
    • https://ruwopevod.weebly.com/uploads/1/3/1/3/131397973/wuwelanu-metogomikafebi.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/1a27643b41869.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365649/normal_5f871c162852a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366008/normal_5f873ceae0be5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367300/normal_5f878f42749b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366009/normal_5f86f929c0c18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365646/normal_5f876975583d6.pdfIn PDF document text
    • https://site-1038647.mozfiles.com/files/1038647/9033228767.pdfIn PDF document text
    • https://site-1038790.mozfiles.com/files/1038790/79929720981.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/987b21c6b.pdfIn PDF document text
    • https://zuwumepegowivos.weebly.com/uploads/1/3/1/0/131069935/8019579.pdfIn PDF document text
    • https://nagifinapu.weebly.com/uploads/1/3/2/6/132696111/liwixo_pavajow_nekotafixu.pdfIn PDF document text
    • https://wurikosaradusif.weebly.com/uploads/1/3/1/3/131384544/40003b1a.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/gapovowumepekegosiza.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/62e89259-c04f-4c41-b508-766a32c62a5a/keligifot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39d90757-8a42-47ab-9040-60450970301b/fufedetukipizomuxezumub.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_off00009060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9060 4920 bytes
SHA-256: e19193fe867d54e76313d88c722e92150db293db3e36c0885ddac941bb673063
font_01_sfnt_off0000a125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA125 16048 bytes
SHA-256: 88154119aaa83267cb9a4742502dd4ce87ecb03183751c950d14414becdfc1f4

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