Malicious PDF — malware analysis report

Static analysis result for SHA-256 7187439a3fa9fe85…

MALICIOUS

PDF

67.1 KB Created: 2021-02-26 20:22:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: c5e11c4d7e22821b8f9555799e15d9d5 SHA-1: 3a9285b9ecd9a03cfe64fa132dd8f8c9224af87e SHA-256: 7187439a3fa9fe85e5f3bfd8b10609cb4ea8c4149808e1c7af9af9a3b0165ae7
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://leonvi.ru/award?keyword=basic+linux+commands+tutorial+in+hindi PDF link annotation
    • http://tosefabebiribow.scienceontheweb.net/world_map_blank_outline.pdfIn PDF document text
    • http://lodubesemo.iblogger.org/angry_ip_scanner_2._21_free_full.pdfIn PDF document text
    • http://rafupofamurawaf.mygamesonline.org/what_are_the_elements_and_principles_of_sculpture.pdfIn PDF document text
    • https://cdn.sqhk.co/kevapaboxer/hgidRhg/25658034729.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454562/normal_6029526c491ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459318/normal_6019d15a99750.pdfIn PDF document text
    • https://cdn.sqhk.co/mojerakikav/2hczhiv/kazubatudoranilovuv.pdfIn PDF document text
    • https://finolija.weebly.com/uploads/1/3/4/6/134625313/rasawafog_xibamanugaju_mamajazu.pdfIn PDF document text
    • https://cdn.sqhk.co/timadupak/hhNheRB/live_streaming_news_fox.pdfIn PDF document text
    • https://cdn.sqhk.co/kawurefeki/gNn9sRa/61936112094.pdfIn PDF document text
    • http://nabavawuzafurur.mygamesonline.org/lamuku.pdfIn PDF document text
    • http://terugate.mypressonline.com/ge_digital_timers.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvopone/cjfuYFM/como_jogar_bomber_friends_online_no_pc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rubuvajaroxe.epizy.com/97983724946.pdfIn PDF document text
    • http://jojisoxig.epizy.com/medical_care_research_and_review_author_guidelines.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_off0000c971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC971 5296 bytes
SHA-256: 8df1201dff957aca3c0a6e15142a0aadcd91b4c09f2ff206c5c92693035e3dc6
font_01_sfnt_off0000db4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB4A 10416 bytes
SHA-256: 8cdc4f5df90487d302ca4ea598b49487870ad6e99305cdc534242fb84ba0b2c8