Malicious PDF — malware analysis report

Static analysis result for SHA-256 b97f298432608e26…

MALICIOUS

PDF

75.5 KB Created: 2021-03-10 21:07:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3baba05720adffa85651418530b18585 SHA-1: 7c16e2e97f40edce7a19095f15082aab908f3604 SHA-256: b97f298432608e266f23ab11e83314bdc68b5d40af654e225fc29b65037fe144
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs, one of which, 'https://soxebez.ru/strik?utm_term=how+to+make+your+clothes+whiter+without+bleach', is flagged as a malicious phishing attempt. The document body, though heavily obfuscated, appears to be a lure related to the URL. The presence of multiple links and disposable hosting suggests a link farm designed to redirect users to malicious content.

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://soxebez.ru/strik?utm_term=how+to+make+your+clothes+whiter+without+bleach
    • https://cdn-cms.f-static.net/uploads/4459325/normal_6045fa9c76b53.pdf
    • https://cdn-cms.f-static.net/uploads/4369629/normal_600c8d991b593.pdf
    • http://pepojen.iblogger.org/crystal_reports_totext_leading_zero.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://e5447efa-8854-4d04-834e-f0bbd7438c8b.filesusr.com/ugd/ac612b_0a764f2d17b54b8eb1575c86f33a4893.pdf?index=true
    • http://fabotiwes.rf.gd/blender_cycles_materials_free.pdf
    • http://kaporeko.rf.gd/hard_callus_bone_formation.pdf
    • https://e82ff0bd-cb1a-4782-8b92-0a0fb7657660.filesusr.com/ugd/d17951_b29ad2f2c02e4b64b5c8d47892cfb33b.pdf?index=true
    • http://jijetebum.epizy.com/good_basketball_shooting_drills_to_do_by_yourself.pdf
    • http://gumigojozupe.epizy.com/7975765823.pdf
    • http://gazezubutajon.rf.gd/clinical_embryology_textbook.pdf
    • https://s3.amazonaws.com/tuxenipup/canticle_of_the_turning_piano_sheet_music.pdf
    • https://s3.amazonaws.com/vobuturinivi/the_global_information_technology_report_2012.pdf
    • https://9042e326-c85f-44e6-b9b6-0c206471fdba.filesusr.com/ugd/0d2fda_f9cdf2910b4c447a841bce29048ecea9.pdf?index=true
    • https://6bc61794-ec17-45f1-96eb-8bed4cd57308.filesusr.com/ugd/217b8a_e04311c8914947619f88bb0527d6907f.pdf?index=true
    • http://wedimotonolisu.rf.gd/lukobapuwerakabidefapakaz.pdf
    • http://gefosudevepap.rf.gd/36458276699.pdf
    • https://s3.amazonaws.com/wipotegadodorek/30414413106.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_off0000e9e5.bin
78e01bf6f96a95a6a1a3e0ded93a9d33ea9a2b7a16325ecbff132f27cc6ea14e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E5 5396 bytes
font_01_sfnt_off0000fc23.bin
968e2060cca57c4c8efaf510bc1c2f54ce754d13f96ce12186a6b0f140ae0ba1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC23 10744 bytes