Malicious PDF — malware analysis report

Static analysis result for SHA-256 b385e8c9ea680221…

MALICIOUS

PDF

80.9 KB Created: 2021-03-08 10:34:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 67c04d3c09dbafe02124cb471b2d3880 SHA-1: 297accfd3e3f7ab6f6a5e56ad0863c331ba60ca1 SHA-256: b385e8c9ea680221dfc05dbf2cbdc6750ca66a027c7f9277e07b3c196db1c00e
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 one specific URL is highlighted as a potential phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, likely for phishing or malware distribution.

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+connect+symbol+barcode+scanner+to+computer PDF link annotation
    • http://milanbeachs.space/microsoft_publisher_torrent2bg7o.pdfIn PDF document text
    • http://jopkapopka.online/aashto_manual_for_bridge_evaluation_3rd_editiontd8ae.pdfIn PDF document text
    • http://pawezujexas.mywebcommunity.org/python_enumerate_string_index.pdfIn PDF document text
    • http://kadanijojabuf.mywebcommunity.org/stephen_kings_it_full_cast.pdfIn PDF document text
    • http://medyahanem.com/21439623844155me.pdfIn PDF document text
    • http://joxitikoki.getenjoyment.net/jakoletajupamotemenaw.pdfIn PDF document text
    • http://gixipures.sportsontheweb.net/how_much_money_does_fernando_alonso_make.pdfIn PDF document text
    • http://jikusofare.mywebcommunity.org/texas_instrument_ti-83_plus_wont_turn_on.pdfIn PDF document text
    • http://sekujirimabasas.getenjoyment.net/stress_management_worksheets_for_elementary_students.pdfIn PDF document text
    • http://jajokojunewi.mypressonline.com/kijuxofe.pdfIn PDF document text
    • http://winovigamaj.mygamesonline.org/97077967707.pdfIn PDF document text
    • http://ketousa.site/south_carolina_driving_permit_practice_testefqg9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zogadawedalifap.onlinewebshop.net/is_zmodo_compatible_with_alexa.pdfIn PDF document text
    • https://80c8fd16-4cf8-4f9f-b52b-d6c956df8f3b.filesusr.com/ugd/1a94e8_e99364639315449bb353166c61283335.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b3a780d-3e71-41d1-8d4a-ee26fd15091a/evh_5150_iii_el34_50_watt_combo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37fd8b4a-8565-4b39-9575-e859bc228793/is_newsmax_tv_on_xfinity.pdfIn PDF document text
    • https://16fd3b15-5541-4454-9538-28daacbf497e.filesusr.com/ugd/e32576_e4aac8e7779b469d89097975bbaa9c6c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aec1a82-186c-4e3c-acde-176d9a0d022f/what_is_the_sunrise_model.pdfIn PDF document text
    • https://c5e26362-acc3-4c40-9db4-ce0cbd355080.filesusr.com/ugd/681527_2d97654881394d3491fd6a5baeed7083.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00011c1c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11C1C 17428 bytes
SHA-256: b3a80b7666560d571d441ff7eb662debc3c2792b1e6f1628cedab29d4151638c
font_00_sfnt_off0000e4f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F2 5512 bytes
SHA-256: f7baad497d44d9db4befcf79db7ee7043a597370fb02a9eb4d0ed0858cbb514f
font_01_sfnt_off0000f7a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A4 10672 bytes
SHA-256: 7013a5b6a0b8e7558fbcafc99f755279e3b1cefb435a1863a273dc33f75b2762

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