Malicious PDF — malware analysis report

Static analysis result for SHA-256 3824244652f5abbb…

MALICIOUS

PDF

89.1 KB Created: 2021-03-22 20:45:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 986e3de622147b66ad80b717c033e993 SHA-1: 23b475fbc11f139d049a4f6eb8282bb60bd8b9b2 SHA-256: 3824244652f5abbba81df632f0466502e8bbfa9ffd1519a111f277ca31a466a8
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier also indicate malicious intent. The embedded URLs, such as https://ponafet.ru/123?utm_term=castlevania+3+path+guide, are likely used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/123?utm_term=castlevania+3+path+guide
    • https://cdn.sqhk.co/nimotixalulo/ahiQSVp/gefunuk.pdf
    • http://lotibamuzuti.scienceontheweb.net/define_debit_card.pdf
    • https://cdn.sqhk.co/nokowifupe/BUMhdbj/diaphoresis_icd_10.pdf
    • https://cdn.sqhk.co/rivogigaweb/hh0APZG/skyrim_dragon_language_translator_symbols.pdf
    • https://cdn.sqhk.co/noxobabidof/wibVJhb/download_20th_century_alternate_history_mod_apk.pdf
    • https://cdn.sqhk.co/sivumazudi/igYfVhb/bluetooth_music_player_for_car_argos.pdf
    • https://cdn.sqhk.co/kigimole/T3ie9NQ/46783020723.pdf
    • https://cdn.sqhk.co/pomiziluda/hijbGig/rodurotetiw.pdf
    • https://kovuvewu.weebly.com/uploads/1/3/2/6/132695697/155701.pdf
    • https://derewoju.weebly.com/uploads/1/3/4/3/134319287/2122607.pdf
    • https://cdn.sqhk.co/tilafukefuwe/cYzTjgi/superhero_x_rpg_fighting_games_ps4.pdf
    • https://cdn.sqhk.co/bajafigotuvi/jBjdidV/yellow_cab_az_app.pdf
    • http://melidagerukebel.sportsontheweb.net/microsoft_excel_flowchart_templates.pdf
    • http://kemikavar.mypressonline.com/basketball_court_diagram_printable.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://27475d5a-2981-497d-8cd5-0c310ef10f8b.filesusr.com/ugd/9cb927_e0be17c887a14798b3f0b4c887303819.pdf?index=true
    • https://s3.amazonaws.com/widofafane/getelodofijanafufujob.pdf
    • https://s3.amazonaws.com/ruzaganog/gerunds_worksheet_grade_9.pdf
    • https://s3.amazonaws.com/dazemi/equifax_credit_report_email_address.pdf
    • https://s3.amazonaws.com/tugabijenovili/geritusarixevezebuvi.pdf
    • https://e31b828f-dd5d-4b35-abba-5777d5fc2ed6.filesusr.com/ugd/56a8cc_7fee8e7236b2454bb2d437dba9c49144.pdf?index=true
    • https://6ec3981f-6443-463b-a164-91fc69f101d9.filesusr.com/ugd/7603ae_7b7bc2d090874f5c8969216026bd3518.pdf?index=true
    • https://d064ede3-316f-4d13-8ec5-014b2136b3bd.filesusr.com/ugd/154db6_b75d03d19da74c9db759c9db421ccb0c.pdf?index=true
    • https://s3.amazonaws.com/pizexopenaxu/english_lit_paper_2_model_answers.pdf
    • https://ad9e3d1f-bb22-46ca-892e-b6aa3325a756.filesusr.com/ugd/837d34_ea6a303832ef457981461f494ffdd66a.pdf?index=true
    • http://pebomotixot.myartsonline.com/acute_lymphoblastic_leukemia_treatment_protocol.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_off00010b93.bin
9af09b3b78453117e7a1ae7c3035050dfa79cebfe96514728ce7a19b9fca31b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B93 4724 bytes
font_01_sfnt_off00011bdb.bin
902be5c2ec3301fa6ca5be000156099ef86dd48417e52761859955b88a5e1832		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BDB 5256 bytes
font_02_sfnt_off00012dbf.bin
4d427f6e0fbe83f50fd07fb1bad4e195d19b6f576d71df0ccedb5e86840dcada		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DBF 11736 bytes

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