Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dfd73c1b46c7c06…

MALICIOUS

PDF

64.0 KB Created: 2020-10-16 06:24:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: f931b9577d69004cb2a819c1ccda1163 SHA-1: 5135af8eb082825af38b91a85045d8c2a98a0ea6 SHA-256: 5dfd73c1b46c7c0607304ec961705d9c34081a2da2ff74a5f67a4e87724372c6
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://ggtraff.ru/strik?keyword=fnma+selling+guide+appraisal In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365655/normal_5f871bd4008ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366032/normal_5f88c82c4b917.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367674/normal_5f888cd7ede46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f86f8ec5c257.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366036/normal_5f88d226622b6.pdfIn PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/zosorunoremuxuza.pdfIn PDF document text
    • https://sovopubi.weebly.com/uploads/1/3/0/7/130775052/rerip_pegijakex_tajojij_farivorepaki.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/1000608.pdfIn PDF document text
    • https://xonimitofowe.weebly.com/uploads/1/3/2/6/132682232/fifimu_sosigegizuz_guvagumunonax.pdfIn PDF document text
    • https://xedaliwim.weebly.com/uploads/1/3/1/4/131454603/08964147fd4868.pdfIn PDF document text
    • https://folarudivol.weebly.com/uploads/1/3/1/8/131871739/sasepatutadaw_bemumajaduvisi_zatidebuxod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369322/normal_5f88236f483f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365599/normal_5f87a24c87aa2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369305/normal_5f87c54ede782.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369665/normal_5f8873982d956.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368481/normal_5f87bb2aa47dd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9269/5456/files/minecraft_potions_chart_1.14.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43e8cc7e-c051-44d9-b08f-f70ddcb9d228/notafimatakowaruwadedowew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a3f60f6-0b0e-4f51-a56b-299b09291a68/fosozokapafulexonamokaxik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21716568-6f82-48e2-9032-98ea08d6ec5d/donopirolugupiwekuze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7166d9e5-ec94-484b-be98-50f1ebf8977e/99572373677.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58ad9799-9eb8-4de3-aba2-cc2d45e038a8/84474153694.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_off0000bd91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD91 5236 bytes
SHA-256: b9c743f8ec61ccc22c131142adc2238118032a89e39183bf44fcf488a3febcea
font_01_sfnt_off0000cf3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF3E 10272 bytes
SHA-256: d0d8fe73bc572cbb811c81493548a5f454902557c664552a01d1622ad4461978

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