Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7e2bed102e7041b…

MALICIOUS

PDF

147.2 KB Created: 2021-04-03 23:42:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 01b3113e0ba248ed9f02d0ab0f9ea9f3 SHA-1: 7c0abd1ff28596c38d5ee256c8564d9958ba1ddb SHA-256: b7e2bed102e7041b4e4f63679888aebcafb5eb339a64a1fe038667b7654e05d7
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically a URL designed to exploit search terms for "mystic messenger cheats". The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to lead users to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yafferge.ru/wix?keyword=mystic+messenger+cheats+without+human+verification In PDF document text
    • http://melowimaz.getenjoyment.net/what_streaming_service_has_marley_and_me.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475861/normal_5fe12d34739bd.pdfIn PDF document text
    • http://zoxodur.sportsontheweb.net/can_you_buy_a_tiny_house_on_amazon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483089/normal_5feb0011c7405.pdfIn PDF document text
    • https://cdn.sqhk.co/rapigufagi/bshkosW/arena_of_valor.pdfIn PDF document text
    • https://cdn.sqhk.co/feripamapuv/PheigJm/color_touch_effect_in_android_recyclerview.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450141/normal_5fff297e7afe4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444358/normal_6030e935e7fdb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418000/normal_5fdc49ab91bc4.pdfIn PDF document text
    • https://cdn.sqhk.co/pumevigatare/HhiggW8/mustang_cobra_iphone_wallpaper.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426066/normal_604067a0c11f2.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/yhdOfib/xosemakoru.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/ceb83f65-f45c-4282-a01f-0fb2c337629e/best_books_for_fitness_nutrition.pdfIn PDF document text
    • https://c8070bf9-ed42-4c5d-8eb8-ca35ee70f136.filesusr.com/ugd/d38238_3b6059be1509427d8a8fe6da1c17298e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7cb79f4-aa67-4afc-8c40-1fb9a6fc4819/agatha_christie_books_top_20.pdfIn PDF document text
    • https://9a4203bb-6ff2-4ef1-9c63-3f113f84a884.filesusr.com/ugd/ea9bdf_6a0757a04137445d97ab4dad70a641d3.pdf?index=trueIn PDF document text
    • https://592f3795-292b-4eb7-bb82-ca7d83343d16.filesusr.com/ugd/44d997_a04a5d5600a746b2b9aff651b875c83a.pdf?index=trueIn PDF document text
    • http://biwosagamivi.myartsonline.com/candlemakers_petition.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001e1f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E1F7 5520 bytes
SHA-256: fd71324ae7746473f6562386a6afb04ef6e6cd01e2ee4f945d26bd000a70458e
font_01_sfnt_off0001f4ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F4BA 2116 bytes
SHA-256: 2d35fe1b112251630f6c3e185fb4bf58c6327cea99f60afab3ca0473214b5b30
font_02_sfnt_off0001fe86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FE86 11980 bytes
SHA-256: f8e3c54b3c54bee29f0bf2a419571f24cc3049cf1ae77d66b61b09eaa1022539
font_03_sfnt_off00022781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22781 16348 bytes
SHA-256: 148380e1503ce8244170089bc61fde2752e1fae2d31a0cb0a3f68c3d618d83b2