Malicious PDF — malware analysis report

Static analysis result for SHA-256 906a755602fb1196…

MALICIOUS

PDF

75.0 KB Created: 2021-03-30 09:08:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 912be75db56422b092f8347162b69e89 SHA-1: 2a9e3ec781df06e38a4c407e11ea1e86e9cb7b58 SHA-256: 906a755602fb119675145c1a7d89ccb9f45d15afb808a8f534d653e5c78a962a
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL `https://nipisod.ru/123?utm_term=bitlocker+for+windows+10` suggests a lure related to software updates or security, a common phishing tactic. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution attempt, likely leveraging a PDF exploit to deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/123?utm_term=bitlocker+for+windows+10
    • https://static.s123-cdn-static.com/uploads/4462344/normal_60036cffc1cdb.pdf
    • https://cdn-cms.f-static.net/uploads/4475987/normal_603182fb13c6d.pdf
    • http://zexaribamemavi.sportsontheweb.net/tecnologia_da_informao_para_gesto_turban.pdf
    • https://cdn-cms.f-static.net/uploads/4450351/normal_60249422127cd.pdf
    • http://savineme.mywebcommunity.org/philosophical_assumptions_in_research.pdf
    • https://static.s123-cdn-static.com/uploads/4419857/normal_5feb5c0fd04cd.pdf
    • http://duwosolutanuz.mypressonline.com/bodedokuzep.pdf
    • https://static.s123-cdn-static.com/uploads/4501777/normal_5fe10bd6077d6.pdf
    • http://folugomobok.getenjoyment.net/21709429625.pdf
    • http://vibolofisef.mywebcommunity.org/gegafufuzapowenevefa.pdf
    • http://vekisonoloze.sportsontheweb.net/junior_basketball_court_dimensions_in_meters.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xedawobu.atwebpages.com/house_plans_with_photos_south_africa.pdf
    • https://s3.amazonaws.com/dazawojob/weekly_chore_chart_template.pdf
    • https://s3.amazonaws.com/rerinago/crash_bandicoot_1_ps3.pdf
    • https://s3.amazonaws.com/vovopafubipu/16631417726.pdf
    • http://wififeju.atwebpages.com/batch_distillation_column.pdf
    • http://zejibanunepi.myartsonline.com/66814143070.pdf
    • https://s3.amazonaws.com/vibasujefir/purodubap.pdf
    • https://s3.amazonaws.com/polexebuj/56735202772.pdf
    • https://s3.amazonaws.com/mivokozibu/us_visa_application_form_in_lagos_nigeria.pdf
    • https://s3.amazonaws.com/vovabagubajegeb/kindle_lee_formato_epub.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_off0000e785.bin
df84304de1fbc9e2ca87ed556eb84c7878e68e5c2e336007a65564ed86903524
pdf-font-stream PDF embedded font (sfnt) at offset 0xE785 5204 bytes
font_01_sfnt_off0000f969.bin
8560d8d0c9a8acae7441723d5199cf3af9a34c9bff80029b9b1ee0d39dc4d77b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF969 11596 bytes