Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fc5e011d7e416b3…

MALICIOUS

PDF

82.1 KB Created: 2021-04-22 04:22:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae9856d21a45381270c813df8f2bde31 SHA-1: eccc7ccd66d5c0b5664bc0f3f4b02dc7daaa751e SHA-256: 0fc5e011d7e416b324fdd5b4762ed1782cf619362685f27e923c495f058fc5a1
156 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, identified as a PDF link farm, with the primary malicious URL being https://fokemale.ru/strik. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or SEO spam. No scripts were extracted, but the structure suggests an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://fokemale.ru/strik?utm_term=samsung+top+load+washing+machine+tub+cleaning
    • https://larulevi.weebly.com/uploads/1/3/6/0/136004384/98a7d144ac4d755.pdf
    • https://zukigepuzena.weebly.com/uploads/1/3/4/5/134593101/babowa.pdf
    • https://namavikevak.weebly.com/uploads/1/3/2/7/132740743/8890678.pdf
    • https://surexirubale.weebly.com/uploads/1/3/4/0/134000129/e970aa9e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/db8ab7bf-9748-4dd5-b56b-7706c051c3d7/waxatefeji.pdf
    • https://b1fdf235-84a1-4479-ba44-7fc4a4f983d7.filesusr.com/ugd/afcd87_11b1607fc1874f76aa12fad0a0d36d78.pdf?index=true
    • https://uploads.strikinglycdn.com/files/deadf2d2-eda8-4d8d-9102-b77581cb8079/how_to_win_betting_jackpot.pdf
    • https://uploads.strikinglycdn.com/files/86a8df57-2db1-44e6-9783-a79bc55871ab/28350816146.pdf
    • https://uploads.strikinglycdn.com/files/f7c2d1ee-b3af-4dd2-8584-00db86631002/how_to_make_google_earth_satellite_view.pdf
    • https://uploads.strikinglycdn.com/files/7b70f2c3-80e6-46d1-a32d-9eb0760005ed/12023292245.pdf
    • https://uploads.strikinglycdn.com/files/b57129fc-11d1-4320-80fc-03c6a478c253/mafimoku.pdf
    • https://uploads.strikinglycdn.com/files/da19d93c-dc68-42db-9e29-c2f320e2f3ca/our_global_environment_a_health_perspective_7th_edition_ebook.pdf
    • https://uploads.strikinglycdn.com/files/64356720-3a42-4342-a1a7-3c6a42a6f5d3/rojumilakuwujegerovila.pdf
    • https://f61a8d15-835b-4c36-a3db-e4ead73ab13f.filesusr.com/ugd/e9f5f3_b4248c2d71b640ea826739a6899bab76.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ab5ff2a8-a7d3-4359-9f41-9b350c208979/who_does_the_voice_of_voldemort_in_harry_potter.pdf
    • https://60f6da8c-824c-4163-aae9-6195f2ac7ed4.filesusr.com/ugd/7f16bd_4f963124fcbe4b8a8157bae2c17f7fbb.pdf?index=true
    • https://368051e9-4199-40ea-b9a2-dc6e6f83cb3b.filesusr.com/ugd/6260fe_95172ff38b4147db9f0b154a0692b603.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f65e63b3-acb4-4759-a685-a8f652e08ce1/audi_s4_avant_engine.pdf
    • https://26c1613e-5d28-4fa3-89cb-3d2c9ab59faf.filesusr.com/ugd/fe83c3_cf891de4c45c403f85b0499f21bb8b6a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/259d1f92-2ac5-48ed-afad-01aa97562e0f/86149313221.pdf
    • https://uploads.strikinglycdn.com/files/1ca68cd1-71f2-4dd4-a41d-71dbe06ce1eb/40188913177.pdf
    • https://5c2df1de-05ea-4e17-9aa3-38adc7ce3153.filesusr.com/ugd/ddd609_3524b35c2dc04e72bb165f1c442a3555.pdf?index=true
    • https://d1ee23ee-9ccf-45b0-80ef-1e1ff1f657c4.filesusr.com/ugd/9ef0c3_b2b0905cb5534b4686551bb80dae0814.pdf?index=true
    • https://80c93ba6-74df-4afb-9852-3a83eaba20e3.filesusr.com/ugd/4cf28d_16cff3b8d98c417ca5d9c939ca3c9e8b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/eff6fdf8-51b5-4168-b2bc-5c3cf91df04e/bumebiluv.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_off0000ff40.bin
cdfbcfc15ebe706b776b77f39a98b195725b44db671cc8e63152a713eb418c0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF40 5724 bytes
font_01_sfnt_off000112a6.bin
78f522c9894ea17a0613bcbff165f19740c0b2e684c3d21914eecef022a23667		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112A6 11740 bytes

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