Malicious PDF — malware analysis report

Static analysis result for SHA-256 23a9589f6c5bf089…

MALICIOUS

PDF

44.3 KB Created: 2020-10-25 12:45:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: c7fd4c61f3c3317576c67bd47443ec50 SHA-1: cf85fe2b63275542516057874174487b436dc2c3 SHA-256: 23a9589f6c5bf089ef85693f56e92a67586c0ec8226684b891d067e318075d86
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=operating+system+concepts+sixth+edition+pdf In PDF document text
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/xutovejiw.pdfIn PDF document text
    • https://lesofetu.weebly.com/uploads/1/3/1/3/131378838/b3f15256.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/wilajolobowefixinate.pdfIn PDF document text
    • https://towetebofipu.weebly.com/uploads/1/3/1/4/131437669/5844884.pdfIn PDF document text
    • https://rojinotur.weebly.com/uploads/1/3/4/4/134442242/paxet-bibimigolo-nemob-dozakinaluxol.pdfIn PDF document text
    • https://suzokixuvajix.weebly.com/uploads/1/3/0/7/130776208/5613269.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366620/normal_5f92dfb13b082.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366027/normal_5f881a07eb94f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380084/normal_5f94129396798.pdfIn PDF document text
    • https://vebaxifi.weebly.com/uploads/1/3/4/3/134360040/bijavevez.pdfIn PDF document text
    • https://rezizeme.weebly.com/uploads/1/3/0/7/130775554/pesegisekojen.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006c1d.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006c1d.bin)
    • https://uploads.strikinglycdn.com/files/e1dcd538-fc7e-4b78-9fca-b516cbecd78b/43602649082.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60b975e6-d979-49ee-b3d5-a9b0c9990b42/vukifaziromizudewo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4ef7a31-bb89-494c-950d-e06538c31638/anime_wow_sound_effect_mp3_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1660d6e2-d320-464c-ae31-394c033c7357/19524126703.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/87194862217.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/outsourcing_ventajas_y_desventajas.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/sosamide.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/3rd_grade_math_placement_test.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/topebamopo.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 extracted file (font_00_sfnt_off00006c1d.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C1D 5736 bytes
SHA-256: 8e4dfba6e60ef25e0f12f775efc9ff807766cc59502bf702f2a64e0ad367384f
font_01_sfnt_off00007f7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F7B 10556 bytes
SHA-256: 9c4ffdffe1cf68eef0aac9423676ff1fc4692c4cee0682da38d00bffbf4585df

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