Malicious PDF — malware analysis report

Static analysis result for SHA-256 40e9784183ec4ef4…

MALICIOUS

PDF

49.8 KB Created: 2020-11-02 17:47:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 47fbc0fe19f034820569704d5502f272 SHA-1: 2ea81c0edc323e727988dfac114b616d9890cee1 SHA-256: 40e9784183ec4ef474f93675574591638ccb9bc636262f49f9dca2424c74c934
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://ttraff.me/123?keyword=weather+channel+msn In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365560/normal_5f880d1cc2130.pdfIn PDF document text
    • https://lesofetu.weebly.com/uploads/1/3/1/3/131378838/2401235.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407988/normal_5f9bcd3b4d94d.pdfIn PDF document text
    • https://dokakida.weebly.com/uploads/1/3/1/3/131380589/gixalaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367635/normal_5f981ab7b7760.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_5f9ba2b4b13c3.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/9051060.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375357/normal_5f8be5b43979f.pdfIn PDF document text
    • https://sawajarenemobo.weebly.com/uploads/1/3/4/4/134494328/1844147.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/9729e9a8-3fae-492c-adec-5fea42860633/robonadobufojifukupekiw.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/gezojuto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9350/1106/files/biology_12_excretion_study_guide_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/119fe934-8c43-4572-a15f-7804c1315050/misa_amane_cosplay_wig.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65A8 4140 bytes
SHA-256: efe062db5796999e1974e0a0bf989d0e353c5c20a11a20b987c233e1e2871494
font_01_sfnt_off00007446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7446 4680 bytes
SHA-256: 7fa15e64e3ae28779d35b6aef419a7a74fb1cf12c8640c3c1bff4d6507238d49
font_02_sfnt_off000083f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83F4 12032 bytes
SHA-256: 92625a53a6c0d507c1af95678d8114a9578d34fcc43ade4851b187d30ad26270
font_03_sfnt_off0000abff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABFF 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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