Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad1456718bedbd26…

MALICIOUS

PDF

80.0 KB Created: 2021-05-05 09:08:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 85fde3f409555b2feb00246e44961b73 SHA-1: 25ef428e3005c46976909f1d4be3e90911ef4762 SHA-256: ad1456718bedbd26f07262cee7b8f91a045ded903b23ba53e351686580279441
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to sites like jumiwimov.ru for further compromise. Although no scripts were explicitly extracted, the PDF structure and URI heuristics point to a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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://jumiwimov.ru/strik?utm_term=cyberpunk+2077+crunch+mod+stack PDF link annotation
    • http://bukupiduge.mypressonline.com/munileweb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494440/normal_6068b2bbae306.pdfIn PDF document text
    • https://cdn.sqhk.co/vemetafije/gdP5vDo/freaks_soundtrack_netflix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461786/normal_60657e7cc6440.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448330/normal_5fcc99f488edc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368238/normal_5fec1a19a8d71.pdfIn PDF document text
    • http://jubigale.scienceontheweb.net/20154836195.pdfIn PDF document text
    • https://cdn.sqhk.co/vakenuda/e8Hgors/predator_viewer_apk_aptoide.pdfIn PDF document text
    • https://cdn.sqhk.co/ruperodu/jgMGUm8/top_100_songs_2011_youtube.pdfIn PDF document text
    • http://wekanisa.scienceontheweb.net/derapumifuzuwaxorit.pdfIn PDF document text
    • http://gipovasota.sportsontheweb.net/jiparudewevawinemozezoga.pdfIn PDF document text
    • https://cdn.sqhk.co/fipimomozuk/lgiXjj2/8027648023.pdfIn PDF document text
    • https://cdn.sqhk.co/tuzijaxab/Jjjjige/puzzle_bubble_game_apk_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d4f4546a-a836-4b3d-8651-c56b89608eca.filesusr.com/ugd/3e9e83_e5d4d2634a9e43b0974093a957a71195.pdf?index=trueIn PDF document text
    • https://aca56392-15ae-48e8-982c-fdf6c4ac0dc3.filesusr.com/ugd/00c070_cee06aab0a7048df88847e4ef3b5f557.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/56fd4717-9572-463e-a697-0832546cf178/96532256200.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4cf2f0e-d0d1-4a56-86f4-8fa8e622f952/who_makes_panel_ready_refrigerators.pdfIn PDF document text
    • https://734e8db3-b9db-457c-abaa-08c06218e7ae.filesusr.com/ugd/f6bb82_a4663471beac4ba08b8e024f6d28da8b.pdf?index=trueIn PDF document text
    • https://528a8416-53f4-4693-bcf0-540471887af1.filesusr.com/ugd/c3aa89_801281ca9f5e450fb3cb35311ffb3eab.pdf?index=trueIn PDF document text
    • https://eb22cd64-ba88-4d74-9269-d2b8937e52af.filesusr.com/ugd/3b217d_1c1029afad3a4460981379129d6d23bf.pdf?index=trueIn PDF document text
    • http://somasetowijo.myartsonline.com/online_file_converter_to_excel_free.pdfIn PDF document text
    • https://68a74d12-89ac-4a94-b826-09ad332a30bf.filesusr.com/ugd/1a0392_89318ae299374209ad185ed490811e20.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC3 2900 bytes
SHA-256: 40ce0bc9b113ef031639604f059b60aa9f1e41b097d60e75bfbf620cccc66306
font_01_sfnt_off0000f907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF907 5844 bytes
SHA-256: 95cdba6f76884c20aa18401dec88109bb035e2570dde02a1d5ad52afd9633346
font_02_sfnt_off00010cc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC5 11028 bytes
SHA-256: 3b32ec93ba3f588b230454ba6b3ffa55b4a49e63898cf92f4c61dd8bf0e9c09a