Malicious PDF — malware analysis report

Static analysis result for SHA-256 099470ff214a2778…

MALICIOUS

PDF

72.1 KB Created: 2021-04-05 07:43:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 1cb7cfef018b57309ad44d67c7665850 SHA-1: b629118f8bf583d5e9cb22044f39d8b28339ca58 SHA-256: 099470ff214a2778a45b27cfb23b62a5cc7a98e7cfcea323a0f6a4e2766b4e30
146 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a callback phishing or tech-support scam, as indicated by the 'SE_CALLBACK_LURE' heuristic. The presence of numerous external URIs, including one pointing to 'mezovuduw.ru', suggests an attempt to redirect users to malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://mezovuduw.ru/strik?utm_term=mitchell+repair+center+login PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4488116/normal_6035d0f774e38.pdfIn PDF document text
    • http://espaceabone.com/pobelodaacoxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393358/normal_6067dc1914447.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369487/normal_60381831452d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379359/normal_5fedaba0492cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483072/normal_606a38de2f1f5.pdfIn PDF document text
    • http://jaxebememapi.iblogger.org/inference_worksheet_tes.pdfIn PDF document text
    • http://xamurewezoviw.iblogger.org/introduction_to_multivariate_analysis_anderson.pdfIn PDF document text
    • http://bivozebavi.iblogger.org/answer_sheet_of_class_10_maths_ncert.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414176/normal_6053048980338.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419412/normal_6022eb8a13f7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404308/normal_60351edee4773.pdfIn PDF document text
    • http://joy-todays.online/36661143831f30k1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501479/normal_5fcd5f8065f7a.pdfIn PDF document text
    • http://kokofiru.22web.org/ffxiv_heaven_on_high_boss_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464303/normal_60556db66c931.pdfIn PDF document text
    • http://podekupe.22web.org/tofaxewimedagugofuwiluj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480423/normal_60160f18dc042.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481158/normal_605d6a68b444a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379844/normal_601af25a52490.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471099/normal_5ffde81f17754.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ninukak.epizy.com/93500440088.pdfIn PDF document text
    • http://sejekaxupoze.epizy.com/tamil_songs_for_mobile_offline.pdfIn PDF document text
    • http://beruraxawiloga.rf.gd/tijatezo.pdfIn PDF document text
    • http://xefowuvujikit.epizy.com/wumivakerinoboxivodoperi.pdfIn PDF document text
    • http://vumazudu.rf.gd/delete_browsing_history_android_browser.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_off0000ddb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB5 5020 bytes
SHA-256: da6ae79d3cb4d7829f0e9e719c8efc68767bd7c1a7e6e15d48ba41f1ec5ac51c
font_01_sfnt_off0000eed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED2 10584 bytes
SHA-256: 2b3eba59e0a4b475f44fd3c78b2aba2f558c37b938c21e8c0ef0e3d99f2cc4f5