Malicious PDF — malware analysis report

Static analysis result for SHA-256 878d21c7f225b387…

MALICIOUS

PDF

88.1 KB Created: 2021-04-03 00:37:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4771d90673ce08d80fe869929921f347 SHA-1: 24fcf253d8e8ee0099e5aec12f6418037b5af833 SHA-256: 878d21c7f225b387f84dcc32d090bceae5579b5fa98fd571ce8411f146f9b921
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that points to a suspicious domain, likely intended for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to malicious content.

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://nipisod.ru/wix?keyword=rhetorical+devices+in+cold+blood+part+4
    • http://xevedudox.sportsontheweb.net/acoustic_guitar_tutorial_for_beginners.pdf
    • https://cdn.sqhk.co/xonivozew/hiieGja/86059716942.pdf
    • http://mojofaza.mypressonline.com/wofuvazisuboribu.pdf
    • https://cdn.sqhk.co/depifozopupe/lghcgd9/impossible_quiz_answers_45.pdf
    • https://cdn.sqhk.co/milibotobov/VzAjgZG/zotiremuvar.pdf
    • https://cdn.sqhk.co/takabalal/ghgih0J/99585582690.pdf
    • https://cdn.sqhk.co/zejovedelali/didigij/gyproc_drywall_sealer_product_data_sheet.pdf
    • http://kitixukizogutik.mygamesonline.org/moseteritutifowo.pdf
    • https://cdn.sqhk.co/vuvesanap/JgfTxPf/fesorejegowapowozurupa.pdf
    • http://vevovifox.scienceontheweb.net/anesthesia_for_medical_students.pdf
    • http://busimaderule.mywebcommunity.org/19502034161.pdf
    • https://cdn.sqhk.co/serutaja/JhbEgj2/98772134144.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://magegefopo.atwebpages.com/60996468746.pdf
    • https://uploads.strikinglycdn.com/files/56354690-ab96-4947-9761-5d6c95bb6112/an_american_childhood_part_2_summary.pdf
    • https://s3.amazonaws.com/tetenifeme/44198886504.pdf
    • http://lusajafimaneru.myartsonline.com/antenna_theory_analysis_and_design_balanis_download.pdf
    • https://uploads.strikinglycdn.com/files/c948cef0-f6ab-44f1-a206-79577a2c64da/sudalazexufijetizugevu.pdf
    • https://s3.amazonaws.com/dowesitobuga/learn_how_to_do_calligraphy_on_procreate.pdf
    • https://uploads.strikinglycdn.com/files/6a074395-d142-4213-b32f-dd0079922a9a/i_am_pilgrim_book_review.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_off00011bbe.bin
b96af159c0df541683b2c4ea153959b23b910a80575c80a14c83b573ff31ab3a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BBE 5456 bytes
font_01_sfnt_off00012e52.bin
e7f5e536a98dfd8a700e16bbf8c3703cdf54f98e6e4335bb685433ddf356f25d
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E52 10632 bytes