Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e98a67901730bfe…

MALICIOUS

PDF

76.7 KB Created: 2021-03-16 18:04:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af694dd71659168f2c71e55676a9f227 SHA-1: bc170b3ef46ab46a295c3c4874ce43f7a071a47a SHA-256: 0e98a67901730bfef8a9d593741b50f8652094c3fcb491a14ef6d1d5f77f478e
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains a large number of external links, with one prominent example being https://soxebez.ru/123?utm_term=amathanna+sinhala+song. This indicates a likely attempt to manipulate search engine results or direct users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/123?utm_term=amathanna+sinhala+song
    • http://bawazofo.getenjoyment.net/bacteria_cell_structure_and_function.pdf
    • http://baliferifopiz.mypressonline.com/hp_designjet_500_large_format_inkjet_printer.pdf
    • http://fawikenaxalu.scienceontheweb.net/how_do_you_reset_a_keurig_after_descaling.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://a72b158e-cead-41d6-a0b3-8518216316a4.filesusr.com/ugd/35c6e2_c7ff863c3e0940e8959624703c59ea51.pdf?index=true
    • https://s3.amazonaws.com/forupokisip/risk_assessment_tools_for_pressure_ulcer_prevention.pdf
    • https://0b609444-e5a2-4a7e-9779-a3c6bae51a53.filesusr.com/ugd/529dbf_f5b2f02ce18d42a1b15fbf53fc1118d3.pdf?index=true
    • http://saxodanokijaj.atwebpages.com/d-link_dir-615_technical_specs.pdf
    • https://s3.amazonaws.com/novifamigot/tubuwedogur.pdf
    • http://bifiwapaz.onlinewebshop.net/60970968045.pdf
    • http://danebusuji.onlinewebshop.net/1332851428.pdf
    • https://s3.amazonaws.com/fibesezati/advanced_bookkeeping_aat_level_3.pdf
    • http://mugazukadum.onlinewebshop.net/wufejubeduwazajifibid.pdf
    • https://s3.amazonaws.com/sorapobuk/best_literary_analysis_books.pdf
    • https://s3.amazonaws.com/mukutud/dukuruperopaxe.pdf
    • https://acfc0e76-311d-46af-9c13-f46c112eb424.filesusr.com/ugd/f90bad_2a26ba81a6c740c28500b6ae731e1b3a.pdf?index=true
    • https://1a441fb4-51dd-4528-a053-eb59ff664e18.filesusr.com/ugd/43d9d5_f5ac9dd6cb8440fc8f2bb2b13b9c1c31.pdf?index=true
    • https://s3.amazonaws.com/kiguteperilodu/ravenous_imdb_parents_guide.pdf
    • http://leparitupoxow.onlinewebshop.net/tesis_contabilidad_y_auditoria.pdf
    • https://5e1449e8-5ae4-4a15-bc7a-ee23795bc964.filesusr.com/ugd/3a34a5_59e8ac78f65c4b198a8805270c3e92ea.pdf?index=true
    • 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
    • http://sinhala.sourceforge.net/
    • http://sinhala.cvs.sourceforge.net/viewvc/*checkout*/sinhala/sinhala/fonts/CREDITS
    • http://www.gnu.org/licenses/gpl-2.0.html

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d55f.bin
a17a476dd17824e9817c39f671d5074e6b698d47bf209fc4888d030a24823523
pdf-font-stream PDF embedded font (sfnt) at offset 0xD55F 4992 bytes
font_01_sfnt_off0000e5f1.bin
28fb1129330497333a0825ac6a509e95a19bdcc6355e8f25f9daa8bdafcb2580
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F1 9072 bytes
font_02_sfnt_off00010244.bin
87a13737e0e0d1eeb92812e3cfd76fc5e570a8d2b4f3b4dfd8252a013cbcdef6
pdf-font-stream PDF embedded font (sfnt) at offset 0x10244 10360 bytes