Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fd3986b6e1e20e9…

MALICIOUS

PDF

77.8 KB Created: 2021-03-16 03:24:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d8fb4bc093b65846a34203962f109a3 SHA-1: d6e9283d5c72cf16afc9ced3080180d53182db57 SHA-256: 3fd3986b6e1e20e999ad658c3c2e10463d35c2893a0613b9ebeb473e85d9930f
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL leading to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to 'questions and answers'. No scripts were extracted, but the presence of an external URI is a primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/wix?keyword=um+actually+questions+and+answers
    • http://logunej.iblogger.org/analytical_hierarchy_process_example.pdf
    • http://vavazexowupex.medianewsonline.com/admiral_washing_machine_not_working.pdf
    • http://vexezujuzas.scienceontheweb.net/the_voynich_manuscript_mystery.pdf
    • http://moxilekulina.getenjoyment.net/jaremametaxom.pdf
    • http://fulukegoror.getenjoyment.net/10559778331.pdf
    • http://xapiduxirob.mywebcommunity.org/14718770115.pdf
    • http://gidonuvawugirid.medianewsonline.com/magic_tree_house_merlin_missions_books_1-25.pdf
    • http://tawaguf.scienceontheweb.net/what_is_the_correct_order_to_watch_the_marvel_films_in.pdf
    • http://xorabawik.medianewsonline.com/tokopixotapajudodadifi.pdf
    • http://fetedeju.mygamesonline.org/magic_mouse_2_not_working_on_macbook_air.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vanuragevexofe.rf.gd/letter_writing_template_ks1_tes.pdf
    • http://jomopizemiz.onlinewebshop.net/scoundrels_of_skullport.pdf
    • http://zepizevut.atwebpages.com/vagawuvofotepekuxikawo.pdf
    • http://ginatadalovemu.epizy.com/vifufakapugi.pdf
    • https://uploads.strikinglycdn.com/files/1e04c992-e71c-49af-bfb1-1afee6052240/doxuviwa.pdf
    • https://uploads.strikinglycdn.com/files/4c56c58b-430e-4a65-bd13-935603729b7a/leisure_bay_spa_g2_manual.pdf
    • http://torejejowomu.myartsonline.com/application_letter_for_accountant_position_for_fresh_graduate.pdf
    • http://sisurafuza.epizy.com/2293941445.pdf
    • http://jalijoruki.atwebpages.com/mathematics_formula_list.pdf
    • http://kivudul.rf.gd/heat_insulators_and_conductors_worksheet.pdf
    • https://uploads.strikinglycdn.com/files/dc344a9f-90ca-4d0b-b985-82043bfbb038/python_programming_john_zelle_free.pdf
    • http://kojoduperoko.epizy.com/vetesuxogusape.pdf
    • https://uploads.strikinglycdn.com/files/a566df4a-e780-4e7c-afce-1a83e879ae70/62777524478.pdf
    • https://uploads.strikinglycdn.com/files/1dce029d-72ed-413e-b9fc-8ce9ab1a0ce4/troy_bilt_pressure_washer_2500_psi_manual.pdf
    • http://juborekif.atwebpages.com/bupisimolilo.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0d6.bin
1a336a1b5293e22af89282899c78e46cff3593a6c44206ddd9fd54cdd4b01aa2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D6 5396 bytes
font_01_sfnt_off0001032f.bin
24776b516c8743df6514a57c27181858d0b2783bd0d291c28e36ee12461513cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1032F 10812 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.