Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e88408eefb18e2b…

MALICIOUS

PDF

86.7 KB Created: 2021-04-08 09:03:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5103fd27337c59386e09a4f3f6a79764 SHA-1: d7f9aef327e1224060e6532bd95bfe970cb9a4be SHA-256: 4e88408eefb18e2b64b96f28ee8450ec9190433a84e8dc455e6b5990844784ea
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 phishing or trojan threat. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, suggests a lure related to singing voice tone, which is likely a pretext to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/strik?utm_term=what+is+the+tone+of+your+singing+voice
    • https://cdn.sqhk.co/jupozaregu/zghr44W/fun_nail_designs_step_by_step.pdf
    • http://lugogow.iblogger.org/57463313758.pdf
    • http://parazepurafeza.medianewsonline.com/manifiesto_comunista_marx_engels.pdf
    • https://cdn.sqhk.co/kopilixa/Ajb5zjd/belemofafasazuxexabubo.pdf
    • http://linodogeb.scienceontheweb.net/learn_korean_online.pdf
    • http://guwajokuxo.22web.org/67661000278.pdf
    • http://cancandance.org/95268393192zbpm8.pdf
    • http://fakurivevid.scienceontheweb.net/les_miserables_cast_recording.pdf
    • https://cdn.sqhk.co/roziguze/8ihjeSp/juventus_vs_barcelona_2020_tickets.pdf
    • https://cdn.sqhk.co/dosovejozeb/ig4ieWG/facebook_app_for_android_5._0.pdf
    • http://lunesygets.xyz/julius_caesar_and_cleopatra_movieba6fi.pdf
    • https://cdn.sqhk.co/kujufemom/dhgLM6O/farm_animals_pictures_to_color.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://97e6e6c8-040d-427c-ad66-6ef02350ae38.filesusr.com/ugd/9c523c_aee45b9b830f445f88a0835af6f864f4.pdf?index=true
    • https://s3.amazonaws.com/zesotat/64538980066.pdf
    • http://nemutevo.rf.gd/kusol.pdf
    • http://gakilasefit.myartsonline.com/wheel_of_time_tv_series_release_date.pdf
    • http://rubuvajaroxe.epizy.com/pioneer_avh-270bt_memory_full.pdf
    • https://5e54d98c-4257-4cc7-9010-48f3df296eb2.filesusr.com/ugd/05240c_347ad46d47514f218c97cdd724f0bbc9.pdf?index=true
    • https://s3.amazonaws.com/jolituzoji/leer_el_libro_la_culpa_es_de_la_vaca_para_mujeres_de_50_aos.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010786.bin
cd8640614a0e37e73f39ed3121d8c112ecb867a2f794a1a9083adc479b2d6371
pdf-font-stream PDF embedded font (sfnt) at offset 0x10786 5168 bytes
font_01_sfnt_off00011929.bin
97def5164395b91932679cb39408dcd7b7ed5c11254f5a5f34797358189af1bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x11929 10684 bytes
font_02_sfnt_off00013d3d.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x13D3D 4324 bytes