Malicious PDF — malware analysis report

Static analysis result for SHA-256 564daa7b56af5448…

MALICIOUS

PDF

81.4 KB Created: 2021-03-17 02:15:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84e99d2a1ffd87da2e60f7a8cb9fb3c2 SHA-1: 7cb2b5ac45ac5a52e57064f859a08d48053cb29a SHA-256: 564daa7b56af54487a09ef25dbabed8f38e640993f238cc8a7405ae344b57247
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF document contains heuristics indicating a browser installation lure, a common social-engineering tactic. It also embeds a URL, https://soxebez.ru/wix?keyword=install+apk+file, which is likely used to deliver a malicious payload or facilitate credential theft. ClamAV detection and ML classification further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://soxebez.ru/wix?keyword=install+apk+file
    • https://cdn-cms.f-static.net/uploads/4469849/normal_604a2f5e2c6a1.pdf
    • https://muvaxajipafe.weebly.com/uploads/1/3/5/3/135313420/5573d14cf0020.pdf
    • https://cdn-cms.f-static.net/uploads/4417675/normal_6015799c323ac.pdf
    • http://vezizulavojunif.22web.org/application_of_queuing_theory_in_hospitals.pdf
    • http://pufujijixupoxo.iblogger.org/percy_jackson_and_the_sea_of_monsters_full_movie_google_drive.pdf
    • http://retaxigeg.iblogger.org/2000_mercury_150_efi_spark_plug_gap.pdf
    • https://cdn-cms.f-static.net/uploads/4470218/normal_5fe70d8a08f4f.pdf
    • https://cdn-cms.f-static.net/uploads/4384143/normal_601139a21067c.pdf
    • https://milavunaxowe.weebly.com/uploads/1/3/4/7/134717052/9bf3b2a34e03.pdf
    • http://nakijeku.mygamesonline.org/11375122374.pdf
    • https://sekikeke.weebly.com/uploads/1/3/4/7/134739811/zuguwaxiz-sojagisite.pdf
    • http://mevukavotidu.getenjoyment.net/que_es_una_propuesta_de_proyecto_de_investigacion.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://puzufowos.epizy.com/low_moor_primary_school_ofsted_report.pdf
    • https://uploads.strikinglycdn.com/files/4c8eb4f6-d7b1-4ab9-8656-4a109a1ba3e5/33694271288.pdf
    • http://wegugoleta.onlinewebshop.net/84966481963.pdf
    • https://uploads.strikinglycdn.com/files/942ce90d-ca42-4a20-8f26-7dd73f49f9ef/xejinopob.pdf
    • http://jumepenitujox.atwebpages.com/what_is_the_effect_of_english_language.pdf
    • http://poziluxolebulu.epizy.com/fimoduwiv.pdf
    • http://darozux.epizy.com/konjac_shirataki_noodles_nutrition_information.pdf
    • https://uploads.strikinglycdn.com/files/d8254f9c-db9d-42fc-b614-197ef4cb7fcf/what_is_the_timeline_order_of_the_star_wars_movies.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed48.bin
7d88a27ec0cf3daafd1fd90dbb5d1ad69cf9fa4aee531d2f4f6009032f231a82		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED48 4800 bytes
font_01_sfnt_off0000fdb6.bin
6488bb93bf196aa9dfe3cde87e66b0ba1763924985c10d9037fdd3d878f14a20		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB6 10744 bytes
font_02_sfnt_off0001227a.bin
31aa257675234f953cb39254c73a0c002637764ec2691c470e0912636c3685cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1227A 16204 bytes

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