Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7138e5926ff85d9…

MALICIOUS

PDF

80.0 KB Created: 2021-03-23 09:44:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2135fe4f8da7b9f266ec1c4fa97be800 SHA-1: 52c715b7d6a162610a36d170722d9d35bf2d1708 SHA-256: a7138e5926ff85d9f5cd23034696cf8ce073a074a77abb31426471c6e69cef7b
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=amnistia+reforma+tributaria+2018 PDF link annotation
    • https://cdn.sqhk.co/fiwujumejuf/jiebHhc/43961133106.pdfIn PDF document text
    • http://dimusenomi.iblogger.org/wejidamaliledisetagef.pdfIn PDF document text
    • http://rapejavom.22web.org/10616691161.pdfIn PDF document text
    • https://cdn.sqhk.co/fosiwesigi/gfgeghf/50477328767.pdfIn PDF document text
    • http://wifunagidoli.mypressonline.com/companies_acceptance_of_deposits_amendment_rules_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/airedale_academy_6th_form.pdfIn PDF document text
    • https://s3.amazonaws.com/jugobimuraje/auntie_mame_script.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/lepezitoginepuxanugelebe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5956e03-a16d-4202-9816-058064cf38b5/sql_server_book.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/velumagop.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/tumble_dryer_sheets_anti_static.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/cheat_india_songs_mr_jatt.pdfIn PDF document text
    • http://lugimeviguv.myartsonline.com/zopowebis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/256a9313-0631-48cd-9213-51f1c90100f4/sistema_endocrino_hormonas_y_funciones.pdfIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A2 5532 bytes
SHA-256: 15b7c40b7e0b66190c6bf4b12bc0226fb0695b404aba7a7023f27eadac6cce90
font_01_sfnt_off00010a58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A58 12096 bytes
SHA-256: 8e8b99db666eb8868d0013c668a877eb45b9d29025ddcdd48b3d5d67064bc498