Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5e2c36dba8cffc7…

MALICIOUS

PDF

73.7 KB Created: 2021-03-30 20:36:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 158e2bfc8f55efa30a7770a2faaa2c02 SHA-1: ebec5477a24ea5bbbc6e174e60aaa8804aa8e4af SHA-256: e5e2c36dba8cffc7c03e00e9c2445a0fb8add4ac22099088ae34407a46dee595
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/wix?keyword=kentucky+falls+miniature+golf PDF link annotation
    • http://leftoutclub.com/72557150484hkhm1.pdfIn PDF document text
    • https://filinisosiwox.weebly.com/uploads/1/3/0/8/130814007/bijok.pdfIn PDF document text
    • https://mabaxezo.weebly.com/uploads/1/3/4/7/134766945/rubobevedemosid-rutor-xirogaxe-kakelegavej.pdfIn PDF document text
    • http://vipmanmarket.space/beruvonefelebakipivujzc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373240/normal_604371d001fb3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459163/normal_5fde83b6ada02.pdfIn PDF document text
    • http://malespw.xyz/how_to_put_together_a_ingenuity_swingr9blt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489852/normal_603225fe79a4a.pdfIn PDF document text
    • http://catsism.com/71657402881pt5kh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495390/normal_5fd27b4db0c2f.pdfIn PDF document text
    • http://chategratis.online/wordpress_html_templates_free_with_css387j4.pdfIn PDF document text
    • https://wujojebexubab.weebly.com/uploads/1/3/1/3/131380870/buviteton_ribaxipi_tugogexadopop.pdfIn PDF document text
    • https://lurevovikofa.weebly.com/uploads/1/3/4/6/134693735/savajevoku_waweb_wososunojaju.pdfIn PDF document text
    • https://wuvonavozaf.weebly.com/uploads/1/3/2/6/132695620/6334d8645.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/28288566-e0a0-4332-bc24-ae01523c2dab/is_narnia_on_disney_plus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62bff01e-d803-4702-a7bd-24522f2f3f34/column_addition_and_subtraction_worksheets_year_4.pdfIn PDF document text
    • https://8dfd47f4-e591-4377-92a3-bdbf91d41e5a.filesusr.com/ugd/a58b01_9629f49646404b9d806244803ba1f204.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/32d76e01-24c9-40a4-be7e-09bcc012feba/night_owl_hd_4_camera_review.pdfIn PDF document text
    • https://ec451167-49e0-489e-a150-d7dc0ecf9264.filesusr.com/ugd/fe0276_4c2d4503a1b34a66baf367c7ac4163eb.pdf?index=trueIn PDF document text
    • https://7f3356c1-ec1f-498a-9d41-5b36c14d87b7.filesusr.com/ugd/98d33d_383229a78ca5431b9f1c070ef52457b9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7f93041-b342-4817-9d72-bed972c5a525/tokyo_ghoul_season_1_finale_episode.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_off0000e13d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE13D 5336 bytes
SHA-256: 39f7a22e53bf949ecb866f337e239b08305868ff10e92545ce8c80a500dcb09c
font_01_sfnt_off0000f366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF366 11464 bytes
SHA-256: 69d834af9bdec79f2f0ac5b1a5bd2264611e7a552531b681a2fd111386e847f2