Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d8f2586ceb58c19…

MALICIOUS

PDF

73.3 KB Created: 2021-04-04 20:38:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50ca96f28b562e409fcc57abd9891009 SHA-1: 642be779c242a581dbc9981dc783961fde6f58b6 SHA-256: 6d8f2586ceb58c19a0b10a40f93b40c60e889f9ef97e9b235a09b385206d1437
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and an ML classifier. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Song of Solomon KJV audio'. The presence of an external URI suggests an attempt to redirect the user to a potentially harmful site for phishing or malware delivery.

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://midufefew.ru/aws?utm_term=song+of+solomon+kjv+audio
    • http://sibasijiv.22web.org/etymological_dictionary_of_ancient_greek.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5862bce9-5bfc-438c-8dba-2a36b65c14d0/pixunurabatugejabusuduv.pdf
    • https://uploads.strikinglycdn.com/files/8c45a6ea-5e38-422d-9280-05696c8bfb0a/93911018047.pdf
    • https://uploads.strikinglycdn.com/files/673a4b42-1e9f-42c0-924d-01a83983971b/what_girl_names_mean_blessing.pdf
    • https://uploads.strikinglycdn.com/files/1ff78f59-cdcd-478c-b8e9-4d31945ecd7a/the_mixed_up_files_of_mrs_basil_e_frankweiler_summary.pdf
    • https://uploads.strikinglycdn.com/files/3e5ed76c-82ac-46ab-85b0-1ed9fa0ddfa4/25070410474.pdf
    • http://saduzubut.rf.gd/catalogo_ngk_mexico.pdf
    • http://talagolow.rf.gd/leave_application_format_for_teacher_to_principal.pdf
    • https://uploads.strikinglycdn.com/files/a74bdfab-61c4-4e86-a8ee-6fa070c3ebec/70944700950.pdf
    • https://uploads.strikinglycdn.com/files/dcfa639d-87f7-4758-acb5-df79b208f6db/javexemisi.pdf
    • https://uploads.strikinglycdn.com/files/37376d7d-34e0-4132-b84c-648e5d3ac437/viriborowekusogodosibolu.pdf
    • http://jefebewo.epizy.com/jay-_z_the_black_album.pdf
    • https://uploads.strikinglycdn.com/files/c5be88be-0a1c-4a6e-806a-e90e683abfeb/how_do_you_find_the_surface_area_of_prisms_and_cylinders.pdf
    • https://s3.amazonaws.com/tezude/dinopom.pdf
    • https://s3.amazonaws.com/rizezobabub/74632103989.pdf
    • http://lowavizoviwu.epizy.com/engineering_guidelines_2-_4-_4.pdf
    • https://s3.amazonaws.com/kisimujuk/important_historical_events_in_india.pdf
    • http://zexenafejesited.rf.gd/miller_and_levine_biology_online_textbook_macaw.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_off0000e113.bin
326412138e40e052dc053be094a620fb82e602101014c97464f63e4070435a85
pdf-font-stream PDF embedded font (sfnt) at offset 0xE113 5436 bytes
font_01_sfnt_off0000f394.bin
d729b1284134d6f6dc58b1ea53015d092e27e83fdbe2fbae7e6b6ae93ed1dfcb
pdf-font-stream PDF embedded font (sfnt) at offset 0xF394 10752 bytes