Malicious PDF — malware analysis report

Static analysis result for SHA-256 9761b2f4d3c97e78…

MALICIOUS

PDF

92.4 KB Created: 2021-03-19 16:54:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: f0334c9ad2d4d9289f52c5da9da7c9fe SHA-1: 98492df495d0d84f30ca4105612e19023a378024 SHA-256: 9761b2f4d3c97e78abe634165447f2eb200c5f155467d621c67cc3c6ce15bcfc
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. Although no scripts were extracted, the presence of external URIs and the nature of the ClamAV detection suggest the document is intended to trick the user into downloading a secondary payload or visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/award?keyword=sinusite+maxillaire+aigue+pdf PDF link annotation
    • http://shishkin-seed.xyz/1213564451294qp3.pdfIn PDF document text
    • http://dufifudusimube.mygamesonline.org/blackcaps_schedule.pdfIn PDF document text
    • http://sosogemizibu.mypressonline.com/93707179715.pdfIn PDF document text
    • https://cdn.sqhk.co/nupegefozub/gdjamp8/temple_run_2_game_download_karna_hai_pagalworld.pdfIn PDF document text
    • https://cdn.sqhk.co/noloxunipe/hfZzgjL/vemimegano.pdfIn PDF document text
    • https://cdn.sqhk.co/nebemina/Xutihhi/nethack_sokoban_2.pdfIn PDF document text
    • https://cdn.sqhk.co/vakamuzawa/curDif6/lojutimedibuf.pdfIn PDF document text
    • http://shop50off.info/mapogatumafasinvfxb.pdfIn PDF document text
    • http://mebovaduzi.mywebcommunity.org/ulisse_aldrovandi.pdfIn PDF document text
    • http://deutschebank-meine.com/c_programming_from_problem_analysis_to_program_design_solution_manual7c0jm.pdfIn PDF document text
    • https://cdn.sqhk.co/tibakekavero/iifuRGk/livestream_studio_remote_camera_windows.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/jefobexapulow/suxuwagidoweziseg.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/the_constitution_preamble_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/sony_rx100_vii_black_friday.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/eye_of_the_tiger_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/free_cid_episodes_full_in_3gp.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/ubuntu_32_bit_server.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/79872235573.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/48146458189.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/40697840603.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/55365722120.pdfIn PDF document text
    • https://s3.amazonaws.com/gedexim/palugutidafikajogudel.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_off000126a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126A0 5532 bytes
SHA-256: 1d1738d4cba8214adef43eea5ec997ca71d8f67010853d7351ee1509fe4d257b
font_01_sfnt_off0001395c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1395C 13200 bytes
SHA-256: 6b56a92a3bdf449ce09d514509e82e7941f25f2e00189ad1b7656d3b8b25268e

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