Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f24b79458512ceb…

MALICIOUS

PDF

76.1 KB Created: 2021-03-15 09:02:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6602ff06923d28d17c8c03b79289e610 SHA-1: 2909dcba628be5e2c4fd51a4237ef82ba6911f44 SHA-256: 1f24b79458512ceb2ab4a511ef9cdebb7ace933fd25dc8f34ca7d0abfe7de3f2
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a malicious domain. The document body, though heavily obfuscated, appears to be related to a fitness equipment manual, suggesting a lure to trick the user into visiting the malicious URL. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://vilenefex.ru/wix?keyword=best+fitness+equipment+inversion+table+manual
    • https://cdn-cms.f-static.net/uploads/4481272/normal_5fd916a23869c.pdf
    • http://copyrightnotices-form.com/jumping_the_broom_netflix_castwgiop.pdf
    • http://memaviwebepa.22web.org/relituduf.pdf
    • http://agencymedia-ig.com/death_cure_movie_plotiszjn.pdf
    • https://cdn-cms.f-static.net/uploads/4388833/normal_602454fa35e01.pdf
    • http://idealslimitalia-oficial.site/honda_excell_2600_pressure_washer_engine_owners_manualhgaoy.pdf
    • https://cdn-cms.f-static.net/uploads/4470977/normal_6020d2fe37546.pdf
    • https://cdn-cms.f-static.net/uploads/4460048/normal_604e95a5f09ae.pdf
    • http://baby-slings.ru/75577365985u33xt.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wetevali/miweforut.pdf
    • http://jubarexapub.epizy.com/selenomifobarez.pdf
    • https://s3.amazonaws.com/zasepo/11th_science_biology_book.pdf
    • http://parepakikil.epizy.com/security_dynamic_analysis_definition.pdf
    • http://leguliwopubagu.epizy.com/actividades_para_nios_de_4_a_5_aos_de_preescolar_para_recortar.pdf
    • http://suvumudupese.epizy.com/saguwadajufuvez.pdf
    • https://s3.amazonaws.com/guwutivupudutu/interview_score_sheet_template_word.pdf
    • https://s3.amazonaws.com/kozibowisenatu/mopunojoremuso.pdf
    • https://s3.amazonaws.com/jalasilunaz/rocket_propulsion_system.pdf
    • https://s3.amazonaws.com/vovuzize/grounded_theory_a_practical_guide.pdf
    • https://s3.amazonaws.com/sinamozagemoger/amos_and_josh_baadaye_mp4.pdf
    • https://s3.amazonaws.com/rokuwapesu/33887883165.pdf
    • http://tajarajizuwoso.rf.gd/parts_of_speech_in_english_with_definition_and_examples.pdf
    • http://farixotipiw.rf.gd/vasibuzabobopedonogez.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_off0000e994.bin
1bcbc7821b0a91cd660a78ea1fbf870e6d421755eedf69eb0f537950ef79d021
pdf-font-stream PDF embedded font (sfnt) at offset 0xE994 5424 bytes
font_01_sfnt_off0000fbfa.bin
c0d69042b909bec7c925264d457b789fe4a15f8405ecf5dd92d0d8fad59fcdad
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFA 11456 bytes