Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2ecacec95511bf4…

MALICIOUS

PDF

43.1 KB Created: 2020-11-03 02:40:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 4cff24c21521b2f0eb15b578e914e076 SHA-1: 236c3ec98e443ad7899782f8e955623d04ef7102 SHA-256: a2ecacec95511bf4ac8208b655ae1c1867d53f27dda53b980d27032bfb1beaae
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://ttraff.cc/123?keyword=srinidhi+engineering+college In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366995/normal_5f8a6e878275d.pdfIn PDF document text
    • https://sanuvexugivi.weebly.com/uploads/1/3/1/6/131606490/50d075ee495.pdfIn PDF document text
    • https://juragubiv.weebly.com/uploads/1/3/0/8/130874328/raxiwazonopuwegek.pdfIn PDF document text
    • https://xebikazogede.weebly.com/uploads/1/3/2/7/132740990/nipos.pdfIn PDF document text
    • https://vorarixumo.weebly.com/uploads/1/3/4/4/134490966/99789838e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365657/normal_5f875336e486b.pdfIn PDF document text
    • https://takotowi.weebly.com/uploads/1/3/4/3/134356266/3660c8d74c14.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/wowabaxisefidet-nikuvajekibesim-napoxalapa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370302/normal_5f8c6ac02d91f.pdfIn PDF document text
    • https://korodaziso.weebly.com/uploads/1/3/0/7/130740443/1680030.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407733/normal_5f93c6597a190.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/68cbf8ba-1806-42aa-ba16-da5bae1448d7/vadezuwuvipamelinupuwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9674bbeb-a866-4560-8ad4-31efb93ff923/76514066949.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/anchoveta_peruana.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/international_creative_management_submissions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3b9570d-68a9-48a3-ae5a-3679053f0a3f/rivaloxajiziju.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_off000069ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69CE 4916 bytes
SHA-256: a21cfa83210d6041330357e755fc00e500e7df3be8508eb6d8320da2c7fa4837
font_01_sfnt_off00007a84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A84 10968 bytes
SHA-256: db48dc8091fbdd79dbacbcadd0ba55ea4e7a3201fbd3a30867c147a1e9f016fa

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