Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6c920e335daca1b…

MALICIOUS

PDF

80.9 KB Created: 2021-03-27 16:21:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2257cc9365c40e6b61eb2848da54cd6 SHA-1: 73d2825435cc946a5f6e8870169e47ef9224cff6 SHA-256: f6c920e335daca1b7e88c18a79a106052d8d076c6b581a2e495a7ad5faa848a3
104 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'dugedepap.ru', which is likely used to deliver a secondary payload. The presence of a 'download button' heuristic further supports the phishing lure attack pattern.

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dugedepap.ru/wix?keyword=iron+snout+unblocked+weebly
    • http://ketibenugato.22web.org/learn_fluent_english_speaking_free_download.pdf
    • http://rezubodojel.medianewsonline.com/delete_watermark_online_free.pdf
    • http://mowefopovog.mywebcommunity.org/biological_classification_class_11_notes_download.pdf
    • http://wibaposazidomaz.iblogger.org/practical_knowledge_synonyms.pdf
    • http://majikok.mygamesonline.org/16155080569.pdf
    • http://gunasog.iblogger.org/mathematics_books_download.pdf
    • http://sokenogatime.iblogger.org/league_of_legends_riot_points_online_rp_generator.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zasufogokalo.rf.gd/rabux.pdf
    • http://ganenimipoje.epizy.com/instagram_video_app_2019.pdf
    • http://tavupikegoseri.epizy.com/english_grammar_worksheets_for_class_6.pdf
    • http://vivusefodubelep.epizy.com/67223377715.pdf
    • https://s3.amazonaws.com/xozeb/luzubumufaruwupopusajeze.pdf
    • http://mejavifoxeb.rf.gd/desventajas_del_aprendizaje_basado_en_proyectos.pdf
    • http://gemakeruw.epizy.com/4482824618.pdf
    • https://s3.amazonaws.com/kifutizijebuj/bidilamiliv.pdf
    • https://s3.amazonaws.com/tobaziw/helping_verb_or_linking_verb_worksheet.pdf
    • http://tipujujidudig.rf.gd/16915223673.pdf
    • http://ripifozuj.rf.gd/stratus_and_cumulus_clouds_form.pdf
    • http://ligexaxo.epizy.com/vocabulary_using_context_clues_worksheets_5th_grade.pdf
    • http://rupeguv.epizy.com/19748384756.pdf
    • http://pexapoxulimexu.epizy.com/vuruninufewumuxazorin.pdf
    • https://s3.amazonaws.com/lizuseguwix/fijezowulatutumukoba.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_off0000ea17.bin
8a70c60148b5a400392a97d57008a316035c5d17ccb820f7681b27aeb3c3404f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA17 5056 bytes
font_01_sfnt_off0000fb6f.bin
d91996a68c60267a94874f0075af7779d9e85a490975b25e415a057e2de75a1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6F 10888 bytes
font_02_sfnt_off000120ae.bin
532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x120AE 16204 bytes

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