Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bfcd888849e1c0b…

MALICIOUS

PDF

54.3 KB Created: 2021-06-01 05:09:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e0c3fcc650bedae4b5065a6c4f9246a6 SHA-1: ae1802c98451a4d5075ddc715265f6cd3d972112 SHA-256: 1bfcd888849e1c0bcec52eb383fc15da554afdb18738858f5f80c2e162992903
124 Risk Score
Tags
free-cdn-ebook-manual-lure

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. It contains numerous embedded URLs, with one specifically noted as a link farm on disposable hosting, suggesting an attempt to redirect users to potentially harmful sites. The document body, though heavily obfuscated, contains keywords related to sheet music, which is likely a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8668

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://huntic.ru/pbw?utm_term=you+raise+me+up+violin+solo+sheet+music+pdf PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4490920/normal_60b546bbd7d2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384649/normal_6033bb91915f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403948/normal_604cf049872d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459325/normal_5fcad3b416510.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464532/normal_5fdce670a12dc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xovelezid.pbworks.com/f/visual_studio_code_python_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56d06705-3926-4f0f-a3f4-fb9858fec799/mujavodeletegesususak.pdfIn PDF document text
    • http://zowonixepor.pbworks.com/w/file/fetch/144441858/75045750033.pdfIn PDF document text
    • http://tazijebep.pbworks.com/w/file/fetch/144419616/21294455551.pdfIn PDF document text
    • http://pokuwatosat.pbworks.com/f/28297518654.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16acccb5-7bb0-4bc6-aa18-7d1d36ba6c32/how_can_i_use_my_phone_as_a_remote_control.pdfIn PDF document text
    • http://muxopal.pbworks.com/f/dakexugerosezuri.pdfIn PDF document text
    • http://zowonixepor.pbworks.com/w/file/fetch/144439749/73712487936.pdfIn PDF document text
    • http://poforezufovu.pbworks.com/w/file/fetch/144432849/how_do_i_connect_my_hp_deskjet_3051a_to_wireless_network.pdfIn PDF document text
    • http://pokuwatosat.pbworks.com/f/miraculous_ladybug_season_2_episode_1_mp4_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea138c0e-e51e-42bf-82d1-91e2a8d09b69/hunger_games_mockingjay_part_2_movie_online_free.pdfIn PDF document text
    • http://viluxese.pbworks.com/w/file/fetch/144428946/74131910742.pdfIn PDF document text
    • http://buvavipoluvu.pbworks.com/w/file/fetch/144424077/guia_super_mario_bros_nintendo_ds.pdfIn PDF document text
    • http://zemenifinabe.pbworks.com/f/sowakojovikazubamam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/670bf5db-bd2b-4eee-8053-6c3f80de0e12/21499572136.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7BA 5416 bytes
SHA-256: 8bb211f42f5f756b70b485f6c7223e9f61617560652e467cbdb72290acd41f98

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