Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca0523ad3b3b49b0…

MALICIOUS

PDF

197.8 KB Created: 2021-02-25 14:21:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 441da0c432c60c43dc01293c132b33c8 SHA-1: e81a42a805725abf0799afcfbadbf72041e11df9 SHA-256: ca0523ad3b3b49b07691bb3acd91e18bafe41d30ab499112164b672091bc66b9
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains an embedded URI pointing to 'https://maypoin.ru/award?keyword=cleric+handbook+3.5+spells', suggesting a phishing or social engineering lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://maypoin.ru/award?keyword=cleric+handbook+3.5+spells PDF link annotation
    • https://gadofipod.weebly.com/uploads/1/3/6/0/136056298/13419bb686312.pdfIn PDF document text
    • https://cdn.sqhk.co/nuwalimo/hcggd29/the_dark_pursuer_apk_mod_1._65.pdfIn PDF document text
    • https://cdn.sqhk.co/tosilura/bgedhcD/gefamuzubivekak.pdfIn PDF document text
    • https://binemipo.weebly.com/uploads/1/3/0/8/130874238/8257666.pdfIn PDF document text
    • https://cdn.sqhk.co/pasojixaju/ghjmEib/piludal.pdfIn PDF document text
    • http://bodikakib.22web.org/gupupavimo.pdfIn PDF document text
    • http://nabizutun.iblogger.org/how_to_calculate_percentage_in_excel_worksheet.pdfIn PDF document text
    • http://zobotalemogi.sportsontheweb.net/is_an_ear_thermometer_more_accurate_than_a_forehead_one.pdfIn PDF document text
    • https://wimiwimevodozaz.weebly.com/uploads/1/3/0/8/130874111/6e17693.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://perotufusutukes.epizy.com/minnie_mouse_sheet_face_mask.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/can_you_hold_me_song.pdfIn PDF document text
    • http://kexobub.rf.gd/81276590323.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/19421337247.pdfIn PDF document text
    • http://jopavufugas.epizy.com/vipawegegiwidepusexeg.pdfIn PDF document text
    • http://gubilozav.epizy.com/information_system_auditor_interview_questions_and_answers.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_off0002cdf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CDF5 5592 bytes
SHA-256: 2f7db5d7b168b86545e2ae2b0997580bd35f0805c53ecbad1d4c9dd78035ad74
font_01_sfnt_off0002e0e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E0E8 12900 bytes
SHA-256: f1ab81805d22746fa441e2e9f125550e25fafacd0eec54951593cd73b66f4b1e

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