Malicious PDF — malware analysis report

Static analysis result for SHA-256 d52d21964833bc38…

MALICIOUS

PDF

55.0 KB Created: 2020-11-02 20:55:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: ed055cb51dfc069b0d5f02c27f15ac3d SHA-1: 3191f75b1e211f5d42b127f74e1833542512e04c SHA-256: d52d21964833bc38290c05c55226ea4b623e85927bacf8b034c7de4374a8e857
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://cctraff.ru/strik?keyword=range+property+management+estes+park+co In PDF document text
    • https://nabesoke.weebly.com/uploads/1/3/4/0/134042749/xawezajera_webidalokedade_soregiker_nagokubogozukat.pdfIn PDF document text
    • https://pasuliwipo.weebly.com/uploads/1/3/1/4/131452824/6140523.pdfIn PDF document text
    • https://zatafepe.weebly.com/uploads/1/3/4/0/134000007/4853626.pdfIn PDF document text
    • https://nutefowamedez.weebly.com/uploads/1/3/4/3/134330341/fowixodi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366395/normal_5f97b76e25f81.pdfIn PDF document text
    • https://bugukafu.weebly.com/uploads/1/3/4/4/134490359/8041581.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/8e42bfb8d1b0f.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/kavud_rejidopaveni_nuxujikalobek_virazuzegivuju.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/eaa38b19c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450353/normal_5f9fc65969607.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00009468.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00009468.bin)
    • https://cdn.shopify.com/s/files/1/0498/1319/2859/files/wristech_blood_pressure_monitor_cen7423cs.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/arab_spring_summary_for_students.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4119/2611/files/wuzadumoferetaxaxaxifanax.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_off00009468.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9468 5392 bytes
SHA-256: 47c7fde9980aad6a28395b9a7fe9380ce7ac6021700ddc2cd60f5046f85ef7fe
font_01_sfnt_off0000a6c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6C3 12256 bytes
SHA-256: ecefd9405bf92d9853fefd94aa3dec59a6b0bb8d48114f9d58f53364cd55f46c