Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9b5c002a1a263f3…

MALICIOUS

PDF

157.9 KB Created: 2021-03-15 20:03:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a9e90662ae118113a477e87cc6ac897 SHA-1: 7bf82de6e33fc34006d079f732eb0238aabf416b SHA-256: b9b5c002a1a263f305f60116a29643072b6f8c252b435c45c781ea3198af08ae
96 Risk Score

Malware Insights

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

The PDF file contains embedded URLs, with one prominent URL pointing to 'kuzutuzo.ru' which is associated with phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily corrupted, contains references to 'wkhtmltopdf' and a movie title, suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 4

  • 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://kuzutuzo.ru/strik?utm_term=kung+fu+hustle+landlady+son
    • http://topsalon.xyz/how_to_turn_on_ipega3s01q.pdf
    • https://naroxelilokatud.weebly.com/uploads/1/3/1/3/131384214/7111130.pdf
    • https://wezuzasiteva.weebly.com/uploads/1/3/1/3/131397996/6749b2584733a.pdf
    • http://gravkamen.ru/kejejivivetamoqr4t1.pdf
    • http://mestorating.ru/binibutagasimewidirugpttj9.pdf
    • https://kajimawujejava.weebly.com/uploads/1/3/5/3/135348493/9615154.pdf
    • http://online-bestshop.xyz/palatesovafeio87f.pdf
    • http://paksorond.xyz/baseball_batting_average_spreadsheet6vz5y.pdf
    • https://vaxawoma.weebly.com/uploads/1/3/4/7/134745114/fajujekunamolisafali.pdf
    • http://ingmijn.com/2010_club_car_precedent_maintenance_manualap3jl.pdf
    • http://wekeb.space/24758660513uzsdr.pdf
    • https://wovanawobudiw.weebly.com/uploads/1/3/5/3/135332940/ledajidijugulex.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://92e0cadd-ca3c-497d-ba7d-1aece6ee6da0.filesusr.com/ugd/008e52_91fa3c1610fe43b6a73cf3d4e1b3a6db.pdf?index=true
    • https://uploads.strikinglycdn.com/files/289a567b-0c8d-4c60-9392-2a2f88f9aef4/62452303092.pdf
    • https://uploads.strikinglycdn.com/files/4266884b-4ff5-44e6-8454-fa4ddb2b817e/bapegivix.pdf
    • https://a21f0d7d-5fe0-4a99-a381-3b18266e0880.filesusr.com/ugd/6c313a_2a7de5fdb66b44e989297431fd263e48.pdf?index=true
    • https://uploads.strikinglycdn.com/files/11781027-6ab0-40b5-bad5-7ed0ad276d39/what_do_painful_bloodshot_eyes_mean.pdf
    • https://8d2868a3-57b7-484c-81f6-493c1c4f5daa.filesusr.com/ugd/a8ca0f_a9e532a776f64b309d77e5ffc8c5e91c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/344ea8aa-39f7-483b-b5f7-30072e6824d6/warogasavojuw.pdf
    • https://uploads.strikinglycdn.com/files/700d0ebf-f03a-4be9-a4a7-7c62a343a866/calories_in_bojangles_cajun_filet_biscuit_combo.pdf
    • https://uploads.strikinglycdn.com/files/23a63d98-9a2d-4e09-8307-f5bbd4d47767/how_do_i_control_the_volume_on_my_samsung_smart_tv.pdf
    • https://uploads.strikinglycdn.com/files/3cc4f580-0e3b-4f6c-a3b9-f29b55c63e04/skyrim_dragon_language_font.pdf
    • https://uploads.strikinglycdn.com/files/72d62db3-5c02-4cda-bf73-b4fb329f8b40/wordly_wise_book_6_lesson_8_word_list.pdf
    • https://3d3b31fc-6152-41c7-b1d4-a4af3afcce63.filesusr.com/ugd/3f8d85_d7a6972e492b4ae28ccb8e0ff60af9a3.pdf?index=true
    • https://ddf64d59-5240-4154-9987-17dfc28e22c7.filesusr.com/ugd/cec570_a5d75304c2b94983a93334ea7c409cd5.pdf?index=true
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000194b0.bin
4e320fb41c9f6e2d86c5d73687eef8807aceea71fe0a9e018c535e90e7c3b47f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x194B0 43208 bytes
font_01_sfnt_off0002190b.bin
0d43b2ee3b63c6cbc206c0000cf43cf072c117d7d729559c40b90e4929b1cda3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2190B 5144 bytes
font_02_sfnt_off00022aa5.bin
85fc0bf0101f6d1d4f6cca8c597ec1b08f7f3659ce0bf0528057cec56f6640cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x22AA5 12952 bytes
font_03_sfnt_off0002546b.bin
73f6f760a67782f27700c3ed047511a210a1e3765a9cc4fd416c63ff6a2522af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2546B 16060 bytes

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