Malicious PDF — malware analysis report

Static analysis result for SHA-256 66ac246219622095…

MALICIOUS

PDF

76.5 KB Created: 2021-03-14 02:23:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7cab97d0570774568bed0cc86dc35ae SHA-1: df1f2ee2859546ef0bd574fc4b257598f469d0f0 SHA-256: 66ac246219622095b28cc5212e398a80a599c99a034dd65d48b3795d27bb13ab
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL `https://vilenefex.ru/wix?keyword=okawville+jr+sr+high+school` suggests a phishing or credential harvesting attempt by luring users to a compromised or malicious site. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://vilenefex.ru/wix?keyword=okawville+jr+sr+high+school
    • https://cdn-cms.f-static.net/uploads/4391326/normal_6049c0c22f272.pdf
    • http://lenemoloj.22web.org/metformin_hcl_500_mg_reviews.pdf
    • https://cdn-cms.f-static.net/uploads/4380384/normal_5fe916e6364b6.pdf
    • http://bobipugoti.iblogger.org/my_tax_illinois_form_reg_1.pdf
    • https://cdn-cms.f-static.net/uploads/4495251/normal_6015eb475adfe.pdf
    • http://jidagepopisar.22web.org/hitchhiker_s_guide_to_the_galaxy_story.pdf
    • http://jeremurapuju.iblogger.org/autocad_inventor_tutorials_free_download.pdf
    • https://static.s123-cdn-static.com/uploads/4453560/normal_5fcc5e1c1391f.pdf
    • https://cdn-cms.f-static.net/uploads/4409627/normal_5fd3413e0c032.pdf
    • https://cdn-cms.f-static.net/uploads/4428331/normal_603fc7ee824c0.pdf
    • https://cdn-cms.f-static.net/uploads/4456134/normal_60281fbd0b88a.pdf
    • https://static.s123-cdn-static.com/uploads/4401696/normal_5ff3d51f7ec86.pdf
    • https://cdn-cms.f-static.net/uploads/4393348/normal_5fe8d4c25afe9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sezewu/nemafageguzojolazilokenef.pdf
    • http://pozuzedudakuv.epizy.com/formal_organization_meaning_in_punjabi.pdf
    • https://s3.amazonaws.com/pulujolatepuv/27032673432.pdf
    • https://s3.amazonaws.com/liwara/direccion_nacional_de_la_policia_judicial_quito.pdf
    • https://s3.amazonaws.com/tolivajupeku/lexique_astronomie.pdf
    • http://lufadavebu.epizy.com/cybex_pro3_treadmill_manual.pdf
    • https://s3.amazonaws.com/midaguvimabof/72816566656.pdf
    • https://s3.amazonaws.com/xakapudakadu/scholarship_award_letter_template_sample.pdf
    • http://nivobilov.epizy.com/ielts_gt_reading_practice_test_with_answers.pdf
    • https://s3.amazonaws.com/jamuluvuvava/adobe_reader_9._1_free_full_version.pdf
    • https://s3.amazonaws.com/susonanezaj/wakesiriti.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_off0000edfd.bin
afabd2c21005bb508afc58f2498d8f6814bf94e90a49227f31f3f3a8c3431b4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFD 5380 bytes
font_01_sfnt_off00010067.bin
5e34403722b4288a216b5020e699d0a9dbf36681c4de75d31502aba50a717456		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10067 10536 bytes

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