Malicious PDF — malware analysis report

Static analysis result for SHA-256 d37d780dd25f24c5…

MALICIOUS

PDF

88.8 KB Created: 2021-03-22 15:26:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c61f585a3da013259d49b02a090dde7 SHA-1: 86703e546d5a1e64c428c460c1318433216b1cb1 SHA-256: d37d780dd25f24c5627268be86630fd95a7f4640780b690ec649693acf472aa8
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 points to a suspicious domain, identified as malicious by ClamAV and an ML classifier. The document body, though heavily obfuscated, appears to contain metadata related to 'Hosa dental terminology', suggesting a lure to a phishing or malware distribution site. The presence of an external URI and the overall detection by multiple security tools indicate a malicious intent, likely to redirect users to a compromised or malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=hosa+dental+terminology
    • https://static.s123-cdn-static.com/uploads/4454544/normal_5fced1722a231.pdf
    • https://cdn.sqhk.co/navotezive/Wjejam3/elementalist_fractal_build_gw2.pdf
    • https://cdn.sqhk.co/kivipemo/igjogi7/nixotaxap.pdf
    • https://cdn-cms.f-static.net/uploads/4493195/normal_60355a5968565.pdf
    • http://gufubugab.22web.org/7292994743.pdf
    • http://xosuvirakogaf.iblogger.org/battery_life_free_android.pdf
    • http://ninolafe.22web.org/what_is_anti_social_behaviour.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/951961d9-fbca-434a-9416-e226f0951e91/23057903039.pdf
    • https://s3.amazonaws.com/ganubatebedoxez/adjective_clause_and_adverb_clause.pdf
    • https://uploads.strikinglycdn.com/files/91344ae6-dad8-4b57-a45f-af7ff7e326fc/guia_para_rezar_la_corona_de_adviento_en_familia.pdf
    • https://s3.amazonaws.com/fadupazageraf/bewawijepuxiz.pdf
    • https://s3.amazonaws.com/lulelepese/employee_registration_form_template_word.pdf
    • https://uploads.strikinglycdn.com/files/9e27ea71-4a4f-4a3f-94fd-b290bcc99807/how_to_use_chefs_choice_diamond_hone_463.pdf
    • https://s3.amazonaws.com/senodiw/712126247.pdf
    • https://s3.amazonaws.com/bajapovogam/carpentersville_illinois_police_reports.pdf
    • https://s3.amazonaws.com/gosete/koreged.pdf
    • https://s3.amazonaws.com/risisipajole/how_to_connect_vizio_sub_to_sound_bar.pdf
    • https://s3.amazonaws.com/dewazewokib/fundamentals_of_database_management_systems_2nd_edition.pdf
    • https://uploads.strikinglycdn.com/files/dae0c099-0337-4e5d-9bf2-86679f8230cb/how_to_put_games_in_ps_vita_memory_card.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_off00011d65.bin
8996812464acaa67d66f5d18985ce61895ae62912df0885f2e60f4f83b08f29b
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D65 5208 bytes
font_01_sfnt_off00012f08.bin
d676da884a25ffb70570aae55557bbec1792293136acc43795e35976b06fe513
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F08 11544 bytes