Malicious PDF — malware analysis report

Static analysis result for SHA-256 5db2a5892a65774b…

MALICIOUS

PDF

77.5 KB Created: 2021-03-11 12:36:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c09018892de878e28b6fe8c4d7347b99 SHA-1: 763daf56eaba3340e3f5617f6147794474cf5250 SHA-256: 5db2a5892a65774bad6b68dc4a5eb1fbbf2d301e9fa83a731a6b0abfb2c3411e
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan by ClamAV. It contains an embedded URL pointing to a suspicious domain, likely intended to redirect the user to a malicious site for further exploitation. No scripts were extracted, but the presence of external URIs and the overall detection profile suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://kuzutuzo.ru/aws?utm_term=what+colours+mean+in+branding
    • http://oneitshop.pro/8387096388266c0g.pdf
    • https://cdn.sqhk.co/bosareke/iyxxRhb/gokerexowagidumida.pdf
    • https://cdn.sqhk.co/bimolixumotu/NviiijZ/jojevu.pdf
    • https://cdn.sqhk.co/gosukutusu/jjjjr8e/66330809482.pdf
    • http://bestcreditcheck.info/does_dunkin_donuts_frozen_coffee_have_sugar_in_itqcgo5.pdf
    • https://cdn.sqhk.co/vizebika/gfifUic/85280963404.pdf
    • http://workshop-fb.ru/muxukodoxenamalazexommme8m.pdf
    • http://nojigopagapusu.mygamesonline.org/sedes_areandina_bogota.pdf
    • http://zuzorovix.scienceontheweb.net/29838844829.pdf
    • http://vabodulesofife.22web.org/flotec_sprinkler_pump_home_depot.pdf
    • http://zovolexune.sportsontheweb.net/the_prayer_of_jabez_book.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://salilizuvozel.rf.gd/flintobox_worksheets_for_2-_3_years.pdf
    • http://vuropomap.epizy.com/wasixo.pdf
    • https://s3.amazonaws.com/begijufadi/facebook_desktop_windows_xp.pdf
    • http://bojedujob.rf.gd/vinopuwo.pdf
    • https://s3.amazonaws.com/datarofapakil/que_se_requiere_para_ser_judo.pdf
    • https://s3.amazonaws.com/megelugik/ximojamutawowiwakixogizi.pdf
    • https://s3.amazonaws.com/sefipa/kojubitat.pdf
    • http://warixogaje.epizy.com/shark_v15z_hepa_filter.pdf
    • http://lijowavatajo.myartsonline.com/67272900627.pdf
    • http://rujugojokukasav.rf.gd/is_fairy_tail_appropriate_for_10_year_olds.pdf
    • https://s3.amazonaws.com/lazolu/31676042516.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_off0000f291.bin
495f036b9963f90aa50134e7f646430fa36c4eb664a665385f9786d7622ffb69
pdf-font-stream PDF embedded font (sfnt) at offset 0xF291 5508 bytes
font_01_sfnt_off00010524.bin
43a00acac6a124eda265895e44a2074d2865ab8958508e88ef36f5bd0e850883
pdf-font-stream PDF embedded font (sfnt) at offset 0x10524 10172 bytes