Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0dcb0c04f1fc0af…

MALICIOUS

PDF

83.6 KB Created: 2021-05-15 11:32:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 3a4fc16a1f1bc9360d977b82a500f217 SHA-1: ea82e83409db4c36fc7e443bdf961ee91c0ae1f2 SHA-256: e0dcb0c04f1fc0afd2a52276ce6e94098ff93c3ed36e1ff19567ce65d39a59a4
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using link farms on disposable hosting, suggesting a phishing or malware distribution attempt. The presence of external URIs and the overall structure strongly suggest this document is designed to redirect users to malicious sites.

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://bologen.ru/strik?utm_term=how+to+resize+image+in+paint+without+losing+quality PDF link annotation
    • http://tifunadepepix.22web.org/nijujozudale.pdfIn PDF document text
    • https://cdn.sqhk.co/difanemifal/jfhgyMy/canada_gay_dating_chat_format.pdfIn PDF document text
    • http://neo-tp.ru/povejejifaxugxyiq.pdfIn PDF document text
    • https://cdn.sqhk.co/letaziseb/gcqhbaJ/mad_gunz_battle_royale_hack_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476569/normal_60062bfd792a1.pdfIn PDF document text
    • http://instacopyrightcenter.com/will_there_be_a_season_5_of_shadowhunters_the_mortal_instrumentsz8her.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450878/normal_60504aecf0208.pdfIn PDF document text
    • http://bitcoinlearningcentre.online/99885495485zyjc8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://02796127-04ec-4c85-b270-c6f7310ebb18.filesusr.com/ugd/ce0e6d_2539246553224d9fa5eaf5f412f2f6b5.pdf?index=trueIn PDF document text
    • https://0cfe495c-9a5f-46a1-a5f3-fb21b6211bac.filesusr.com/ugd/7aabb2_e661841c6f084adbb0c42398e718290b.pdf?index=trueIn PDF document text
    • https://c9b0c9dc-51ad-46ec-84b2-dbc26df53712.filesusr.com/ugd/b6f588_4dc378ec9e3741e3b9eec87ec9214f92.pdf?index=trueIn PDF document text
    • https://53f03ce6-db0b-4f41-9bfc-6956ba41e1f4.filesusr.com/ugd/727e0f_5776ae95174544dd9ecd0f65a2fc595f.pdf?index=trueIn PDF document text
    • http://xelefufod.rf.gd/best_markup_app_android.pdfIn PDF document text
    • http://folizel.epizy.com/kidebelixalexurewowopej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90031c51-4dae-47bf-b8ed-a2fa298d0a49/31635221451.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d89d524c-ae94-4ea7-9dc3-3c91d7d043a9/lerewujimapomegukilix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1b8d51d-6ee3-412c-b12c-1d2783669608/how_to_reference_an_online_newspaper_article_apa_style.pdfIn PDF document text
    • https://411be8f8-4ba1-40b5-9edf-cc4a2c3d5ecc.filesusr.com/ugd/a86d68_ab4204b8240345aca36971fd8ddc1966.pdf?index=trueIn 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_off000106e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E2 5564 bytes
SHA-256: 596f918566a0d1fcea3e8a7baa31cac6c0d389bcb526ee8b2cfeb19df3d65674
font_01_sfnt_off000119c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119C1 11612 bytes
SHA-256: bee521378b642d795509404293cfca81f59b4a6ea6f6367b33243f56073d8bbd

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