Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ad94aca69cc5478…

MALICIOUS

PDF

84.2 KB Created: 2021-03-28 19:08:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 985d3cfb4feb924f9fac77b64159b301 SHA-1: d19352a4a35f0cfb410c7fc65a017c4513f4c887 SHA-256: 8ad94aca69cc5478dd04095ad1f4c3aafa67fc8030a3f6a52599b9c5853b15b4
136 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is malicious and attempts to lure users to external URLs. One such URL, 'https://resalured.ru/strik?utm_term=how+to+add+micro+sd+card+to+roku', is directly embedded and flagged. The presence of the 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document may be part of a multi-stage attack involving encrypted archives. While no scripts were explicitly extracted, the PDF structure and embedded URLs are strong indicators of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://resalured.ru/strik?utm_term=how+to+add+micro+sd+card+to+roku
    • http://bometaximom.scienceontheweb.net/63489857409.pdf
    • http://jijoxep.getenjoyment.net/75336631367.pdf
    • http://fulifubajamo.mywebcommunity.org/jigodelomimetotubokelapet.pdf
    • http://gaxenop.medianewsonline.com/cellules_gliales.pdf
    • http://wapividazofar.scienceontheweb.net/water_jet_machining_download.pdf
    • https://cdn-cms.f-static.net/uploads/4483335/normal_6050e65e405b0.pdf
    • http://nusowutevu.getenjoyment.net/laroxejuruludopadada.pdf
    • https://cdn-cms.f-static.net/uploads/4421639/normal_600e88e2239de.pdf
    • http://gogejevi.iblogger.org/apex_launcher_apk_3._3._3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xotomisen/logitech_group_video_conferencing_system_datasheet.pdf
    • http://ruxevomim.rf.gd/best_excel_budget_template_2017.pdf
    • https://s3.amazonaws.com/gagotaniwipure/osaka_subway_map_english.pdf
    • http://kosezofejesuxef.atwebpages.com/antennas_and_wave_propagation_textbook.pdf
    • http://dimizisunope.epizy.com/multiplying_decimals_worksheets_grade_8.pdf
    • https://s3.amazonaws.com/novifamigot/67821945535.pdf
    • https://s3.amazonaws.com/xonobijikivo/80704486256.pdf
    • https://s3.amazonaws.com/xupovobejanam/which_surah_talks_about_jihad.pdf
    • http://rumakepalo.rf.gd/gafedemepiwasod.pdf
    • http://negubikalijewu.epizy.com/33456850710.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_off00010cd6.bin
7057572327fd2e3a36420880c5ac1e91d2d52ddf3d5a687828f80712e766709b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD6 5172 bytes
font_01_sfnt_off00011e67.bin
2cb457adc11e9b6723577807ea387b80f359a98eedcb128f2269ca923b14842c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E67 10928 bytes

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