Malicious PDF — malware analysis report

Static analysis result for SHA-256 a161d7d30c6fb1b9…

MALICIOUS

PDF

68.5 KB Created: 2020-09-30 09:34:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 362fa9ab6234590aa8603228e7e07db6 SHA-1: 5000615ca3b913c67e0621e66fd95eded266af57 SHA-256: a161d7d30c6fb1b9d873571c4b080b432cb28158a8492c898351f59164413d3a
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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 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.
  • 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=blockchain+technology+mit+pdf In PDF document text
    • http://fabap.bernielagana.com/uploads/1/3/0/7/130740368/504fd6f4c.pdfIn PDF document text
    • http://files.leeharrisskating.com/uploads/1/3/1/4/131406662/e869ba7ff.pdfIn PDF document text
    • http://files.cherrycanyondairy.com/uploads/1/3/2/6/132682899/nudemamafoton.pdfIn PDF document text
    • http://files.epmusicwithatwist.com/uploads/1/3/1/4/131453902/sivuvunipudomom-lodidesufe-gakovopaz-gidepiji.pdfIn PDF document text
    • http://files.lainejaderbergassociates.com/uploads/1/3/1/4/131438570/kitulekinobawe_lutalubepefipe_junimividulup.pdfIn PDF document text
    • http://ragum.empiredanceco.com/uploads/1/3/0/7/130738902/6799102.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/dd400ba7-7be9-4a4d-928d-0e66d102cd32/bepetajerilalabeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b36924d2-29ff-4180-8300-d3fd7ca64b33/luruporivowabixi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6410/6908/files/roxukibasepimeku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7362/5500/files/infinity_to_the_infinity_power.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2577/4245/files/factoring_polynomials_with_four_terms_worksheet.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_off0000d129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD129 5508 bytes
SHA-256: 3a7d3d3f31a4169b381c7c55a598c14d832cd6a6d8c3045796a47a0808e6ec3a
font_01_sfnt_off0000e3d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D3 9820 bytes
SHA-256: daba4f74ea2e1b9e7701c80ec9c144fff7c9c7f5542c8b67480c208e7f4a5897