Malicious PDF — malware analysis report

Static analysis result for SHA-256 3de9b32547116143…

MALICIOUS

PDF

81.0 KB Created: 2021-03-25 05:23:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 3d4e928bfc10b8e20ea022b5812b91d5 SHA-1: 17e15415836bb8b113a727677d25a9514f680a93 SHA-256: 3de9b325471161431390a57d1b623d8031ccc3774dcd0fcce7ac0e8fcb8323a7
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are indicative of a link farm. The document body, though heavily obfuscated, suggests a lure related to 'Canon in d piano sheet music'. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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://ponafet.ru/award?keyword=canon+in+d+piano+sheet+music+free+printable+pdf PDF link annotation
    • http://nonowun.mywebcommunity.org/acid_rain_project_for_college.pdfIn PDF document text
    • http://wutanumijejol.sportsontheweb.net/99889825123.pdfIn PDF document text
    • http://xijivedijimidip.mygamesonline.org/70773648405.pdfIn PDF document text
    • http://rasudilikid.mywebcommunity.org/the_wonder_weeks_book_vs_app.pdfIn PDF document text
    • http://maxiteguf.medianewsonline.com/4249741557.pdfIn PDF document text
    • http://ligugiban.scienceontheweb.net/ginimexofaloxetisivo.pdfIn PDF document text
    • http://fobativ.mywebcommunity.org/simple_application_letter_for_driver_position.pdfIn PDF document text
    • http://tarekupi.scienceontheweb.net/strength_of_materials_objective_questions.pdfIn PDF document text
    • http://negifowutagur.mygamesonline.org/cardiothoracic_surgery_textbook_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sefipa/pl_sql_sqlplus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86df62a3-6353-4d2a-bbcb-08dcb67d8670/sanyo_fwzv475f_dvd_vcr_player_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21a12257-29e6-4132-aa44-58fd063d4222/kiraramagevujelovefibilan.pdfIn PDF document text
    • http://kalasoziluxolim.myartsonline.com/saxebare.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/dukusi.pdfIn PDF document text
    • https://e8c82854-2a0b-4c0f-82de-bac600ce06e6.filesusr.com/ugd/d017d5_9e1c41c17bd04d548feca061992c6b31.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/70723076808.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e164c6d2-3bcc-44f7-a924-3654a8fa19ce/long_way_down_movie_poster.pdfIn PDF document text
    • https://f200304d-316b-45a9-b05c-680123ec6d1a.filesusr.com/ugd/aad1a2_d8174f8733824b7292256028e24e1145.pdf?index=trueIn PDF document text
    • https://d1ee23ee-9ccf-45b0-80ef-1e1ff1f657c4.filesusr.com/ugd/9ef0c3_b72752323dff4672886d1873fc362840.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/centurion_movie_in_hd.pdfIn PDF document text
    • http://vigavanoxe.onlinewebshop.net/mahalaxmi_calendar_september_2020_download.pdfIn PDF document text
    • http://dapufojutujat.atwebpages.com/letivawufuwozanikofuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72c08f45-f2d7-423a-aae5-17809b25ec8b/what_does_the_rule_of_thirds_mean_in_photography.pdfIn PDF document text
    • https://f110cc6a-49d6-427c-9ab6-a3a4d323b004.filesusr.com/ugd/9e53d4_82ded75f5063466981a0771415a5ed0b.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_off0000f11e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11E 5440 bytes
SHA-256: 46c915c2fef58b130f4b5bba41f6c0da9e2bbc3ab81163fe48802374a341c0c4
font_01_sfnt_off0001036a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1036A 10968 bytes
SHA-256: 86cc4801af603391a564f37e6768c2d8ca2923097af086d6351a7792a0d9ed7a
font_02_sfnt_off000127f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127F2 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3