Malicious PDF — malware analysis report

Static analysis result for SHA-256 f69b47ab9b2bdcb1…

MALICIOUS

PDF

71.2 KB Created: 2021-03-03 19:52:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34ce3bfad3e5e60b832ddc3a79d7f701 SHA-1: 5e1aabb43f5c378feb72dff2aa34c285cabd833b SHA-256: f69b47ab9b2bdcb1a6101712dfc274c364bef3313091d8432f280d490b8421b4
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that directs users to a website disguised as a study guide, likely to facilitate a phishing attack. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to exploit users through social engineering, potentially leveraging JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/wix?keyword=hvac+licensing+study+guide+second+edition+pdf
    • https://latobebesat.weebly.com/uploads/1/3/5/9/135993630/seminisumejux.pdf
    • https://nifakisafuzum.weebly.com/uploads/1/3/0/7/130775286/sirafarezefig_zomupi_ditasefuxixo.pdf
    • https://cdn.sqhk.co/pibepufas/PgcjjDh/goodreads_best_books_march_2020.pdf
    • http://vatidenow.medianewsonline.com/bumiwenixo.pdf
    • https://migixemigesafo.weebly.com/uploads/1/3/1/3/131381985/5611752.pdf
    • https://cdn.sqhk.co/xenojepezere/Nhiieij/kosotesogag.pdf
    • https://cdn.sqhk.co/vibisidumes/hiZrghN/samsung_galaxy_xcover_4s_test_kamera.pdf
    • https://cdn-cms.f-static.net/uploads/4420743/normal_600a071119754.pdf
    • https://lasuresupaka.weebly.com/uploads/1/3/2/6/132683400/xatazo-vomimegumeloj.pdf
    • http://forovasax.medianewsonline.com/46238022979.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/vibasujefir/balemexavijususaxite.pdf
    • http://gozenabuzixi.onlinewebshop.net/kasoxamukeluvife.pdf
    • https://s3.amazonaws.com/bagisi/les_articles_partitifs_grammaire.pdf
    • https://s3.amazonaws.com/bokofapig/andreas_moritz_kidney_tea.pdf
    • http://badokelo.rf.gd/avatar_258_apk.pdf
    • http://bawulega.rf.gd/actinobacillus_suis.pdf
    • http://jewofeket.onlinewebshop.net/mifutaruxexoxob.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd88.bin
df8eaff754a887020d1020b9dcca0121bc9a6f239b8d43b1ebe14c68442ecbaf
pdf-font-stream PDF embedded font (sfnt) at offset 0xCD88 5232 bytes
font_01_sfnt_off0000df72.bin
0271ff7bc3b599c7dc07f18ad187b4358e031526df7ba2428bc1da18b5a907f8
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF72 9984 bytes
font_02_sfnt_off0001017f.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x1017F 4324 bytes