Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecbe37bfec56b25d…

MALICIOUS

PDF

70.9 KB Created: 2021-03-19 19:29:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba733087e718f513667b389561e8d188 SHA-1: b610c8bf64a7bbe0dff60c6dfc66c17cc5750298 SHA-256: ecbe37bfec56b25d17eb145eb16b24b25c794a5903b2c5e3877a2b71ce7dfe1a
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that redirects to a suspicious domain, likely intended to deliver a malicious payload. Heuristics indicate the presence of external URIs and a high ML score for maliciousness, further supported by ClamAV detection as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to educational content to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jumiwimov.ru/award?keyword=eksistensi+pendidikan+islam+di+indonesia+pdf
    • http://pesowulil.iblogger.org/resizob.pdf
    • http://votutatiturapat.22web.org/what_are_the_five_leadership_skills.pdf
    • http://lokubakodo.getenjoyment.net/sample_welcome_speech_for_seminar.pdf
    • http://topukovatawosu.sportsontheweb.net/breville_mini_smart_oven_review.pdf
    • https://cdn.sqhk.co/lemisobe/gCGijY0/76894313854.pdf
    • https://cdn.sqhk.co/zikegasenar/hbicMVM/uptv_app_roku.pdf
    • http://dasiwujupuna.sportsontheweb.net/barcelona_bus_turistic_map.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ef9d90ca-5811-4a1c-810e-75bcfae60121.filesusr.com/ugd/a33af7_c59823e719ec4c88a586a928efaa514e.pdf?index=true
    • http://bupalim.atwebpages.com/aquatic_exercises_for_back_pain.pdf
    • https://s3.amazonaws.com/lolaritemukole/34719032140.pdf
    • http://lekeviwa.onlinewebshop.net/aua_bph_guidelines.pdf
    • http://wififeju.atwebpages.com/how_to_use_safety_1st_humidifier.pdf
    • https://0a9dc515-c6d9-419f-b4de-d801a8c2a39b.filesusr.com/ugd/760a4c_21cb8f346ef940008440afc00a0d7552.pdf?index=true
    • https://s3.amazonaws.com/babuxufarizuxur/play_script_template_ks3.pdf
    • https://s3.amazonaws.com/votubukaxogilix/74108851061.pdf
    • http://sawesupunozigiv.atwebpages.com/q_see_presidio_default_password.pdf
    • https://s3.amazonaws.com/sakaburepagase/45906864477.pdf
    • http://donijexufenu.onlinewebshop.net/indian_history_books_in_hindi_free_download.pdf
    • https://s3.amazonaws.com/tesodagiwor/sacred_geometry_patterns_in_nature.pdf
    • http://wijuweluxevem.rf.gd/ceinture_de_kuiper.pdf
    • http://kakasis.onlinewebshop.net/80134469095.pdf
    • https://63aa7d51-6c54-48cc-ac87-b710a0da19c3.filesusr.com/ugd/c8d394_fc633c0cc77c497c8aa0f7fd0112b6aa.pdf?index=true
    • 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_off0000d97c.bin
1a590341e24d16681c896c060320d360bf797996d328aa94ef33a483a2840032		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD97C 5112 bytes
font_01_sfnt_off0000eadf.bin
f59a08641609b5e8ba173e67dc47df3ee5c14b6c8bcc6f6bb01125d77fa18b39		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEADF 10172 bytes

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