Malicious PDF — malware analysis report

Static analysis result for SHA-256 13a12d5821441111…

MALICIOUS

PDF

81.1 KB Created: 2021-03-15 05:33:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48a2ffc894a8cbc25bb725fc92cb8cb1 SHA-1: 81a94cd146b590a82b99d02044829f181553260d SHA-256: 13a12d5821441111890714c99ba26a1844e1a984df4bb2ab1544eec5a48402f4
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that leads to a domain known for hosting malicious content, identified by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, suggests a lure related to academic information, aiming to trick users into clicking the malicious link. The presence of external URIs and the ML classifier's high confidence score further support the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://maypoin.ru/award?keyword=alagappa+university+dde+exam+time+table+december+2020+pdf
    • http://kudukulid.22web.org/latest_bollywood_movies_free_khatrimaza.pdf
    • http://visiblawty.com/zujatawobagibilezutumapob1gm.pdf
    • http://tizadejaso.getenjoyment.net/zoxovexe.pdf
    • http://noxaduva.mypressonline.com/trimble_access_general_survey_user_guide.pdf
    • http://lofeboxirav.iblogger.org/tai_chi_24_form_back_view.pdf
    • http://cmb-accueil.com/palowelozepixubobod0cbbx.pdf
    • http://jekenufakewe.mypressonline.com/kaz_humidifier_v745a_manual.pdf
    • http://jikusofare.mywebcommunity.org/creative_chordal_harmony_for_guitar_free.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5e6fcab6-b8a5-454c-aead-1dff950c22bd/95806021016.pdf
    • https://s3.amazonaws.com/dukavunivifa/choreiform_movements_pronunciation.pdf
    • https://76c9fb28-c10e-4950-85be-37de24a2ede8.filesusr.com/ugd/fa32a6_74e375149590404db879df373ab00c2a.pdf?index=true
    • https://s3.amazonaws.com/vofadoloves/gelisugiwovepusopasanug.pdf
    • https://uploads.strikinglycdn.com/files/df5ddbfb-6db7-4fef-913c-1989398ea694/warm_bodies_trailer_reaction.pdf
    • https://b20aee1f-b1b7-4e4e-be5e-d884e4ece670.filesusr.com/ugd/10e3af_b757895f056e456b85acb7d6f2b97749.pdf?index=true
    • https://a5a7f18c-b887-48a0-80cc-3627c14345d5.filesusr.com/ugd/609f59_a555b4aa0e564a6bb6b2c2b990830b37.pdf?index=true
    • https://858e1da1-ad31-4e5b-aec0-89c59c6c71f6.filesusr.com/ugd/6240f8_7801024247eb4ec3a9849484d2763674.pdf?index=true
    • http://toxanezijar.rf.gd/tagevonularogosozumeno.pdf
    • https://s3.amazonaws.com/watajive/bahubali_2_songs_free_doregama.pdf
    • https://uploads.strikinglycdn.com/files/a2464e4b-d209-4fac-9458-5f8ce36643af/28834366485.pdf
    • http://rinalixuli.rf.gd/basic_electronics_interview_questions_and_answers_for_freshers_in_hindi.pdf
    • https://76df98a8-3e94-4eee-a6f5-23e1de06049b.filesusr.com/ugd/54c74c_165616f4d7204961a4db163bc8b6868e.pdf?index=true
    • https://s3.amazonaws.com/timeziso/receipt_template_uk_word_free.pdf
    • http://kitukogoxav.epizy.com/a_project_report_on_financial_performance_analysis.pdf
    • https://uploads.strikinglycdn.com/files/429a04e2-ea2d-4fc8-91f6-ebb7c7eb6c3a/37012694000.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed1f.bin
211d2feb0964522529de946826970891375e6a965b5ddbc5fe50da520ed902a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED1F 6108 bytes
font_01_sfnt_off000101e4.bin
9423656d9d500496873a3ef4c0159c00afc56229a69676584927389981940208		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101E4 3476 bytes
font_02_sfnt_off00010fff.bin
91a74b0ec5934c121e128dcf182b984d4b29b5db64c3b8b651839d6d09d22ac6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FFF 10584 bytes

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