Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a89e14845d49f7f…

MALICIOUS

PDF

77.8 KB Created: 2021-03-17 22:29:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0022925ff228b7e5345c3a4d002745b9 SHA-1: 55a3321426b6ac8733ae3948d3533c2f1bb02c48 SHA-256: 5a89e14845d49f7f8d51199363d03a3e3bd0d1fb0d96d8c36d18492c6f1c900c
126 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 phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to stock market information, likely to encourage clicks on the embedded malicious links.

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://lozipotod.ru/aws?utm_term=when+does+the+stock+exchange+close+today PDF link annotation
    • https://cdn.sqhk.co/duputokodoz/8hhMXdu/22963790777.pdfIn PDF document text
    • http://wogavuxemadirof.iblogger.org/62921595714.pdfIn PDF document text
    • https://cdn.sqhk.co/masamiwe/iiahFid/lagunerorizozawe.pdfIn PDF document text
    • https://cdn.sqhk.co/dewufidabo/hidhfQx/dell_kb216_keyboard_driver_windows_10.pdfIn PDF document text
    • https://cdn.sqhk.co/fegadosijete/JDIYjhS/ai_generated_python_code.pdfIn PDF document text
    • http://esmoney.site/vagonolatikadalixizexeseuzh18.pdfIn PDF document text
    • http://milanbeach.fun/strengthsfinder_2._0_test_free_downloadsojzx.pdfIn PDF document text
    • https://cdn.sqhk.co/ludibipimilu/vgj6vhe/69804582254.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f56b49b7-9a4c-405d-8786-20fd0ed5736b/pezaledokilomolumepir.pdfIn PDF document text
    • http://zapofekeba.rf.gd/47722247581.pdfIn PDF document text
    • http://zovitox.epizy.com/banshee_workshop_manual.pdfIn PDF document text
    • http://zixakuwali.rf.gd/how_to_program_sansui_tv_remote.pdfIn PDF document text
    • http://boxokur.epizy.com/bopasebe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e6f0364-0fc9-4861-ad35-2aac63a5d462/73441209878.pdfIn PDF document text
    • http://fonawemosel.epizy.com/sajopowagorubuzidos.pdfIn PDF document text
    • http://jabowedufup.epizy.com/vibewakepatusulazusi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/446f4e6b-3aef-4c4f-91cf-eb78b8a3b181/gokametali.pdfIn PDF document text
    • http://puwiliguso.rf.gd/nuzubowaxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f080c7e6-f086-4a69-952c-fecc3f384250/dobafi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A1 5352 bytes
SHA-256: 6771838d7ee848f6ad0827922815ff7f1bbf2280ef0bf2b7c3d59d590afe3bac
font_01_sfnt_off000103ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103ED 11196 bytes
SHA-256: b31d35fb4986404e6a7f6603f8e8978631891017f830ebe2d5fc507df489d27f

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