Malicious PDF — malware analysis report

Static analysis result for SHA-256 957fdcbe549215a9…

MALICIOUS

PDF

75.9 KB Created: 2021-04-05 08:53:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33d263ae2c8e2d3db457c4984cad7eb9 SHA-1: 94bf84aa1ac2ccdd5b75c96c81e5bd2c50e16e7b SHA-256: 957fdcbe549215a965e58458e3edad9af1f335ad1f714e4e535f2121e8ca8748
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://kuzutuzo.ru/wix?keyword=pasquale+buzzelli+wikipedia', which is likely intended to trick the user into believing they are accessing legitimate search results. No scripts were extracted, but the overall structure and embedded URL suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/wix?keyword=pasquale+buzzelli+wikipedia
    • http://xigosilefonaboj.iblogger.org/camino_de_santiago_guide_book.pdf
    • http://fosipuzo.mypressonline.com/how_to_put_us_army_on_resume.pdf
    • https://jezasowafinam.weebly.com/uploads/1/3/4/5/134530254/5072353.pdf
    • https://sitepofom.weebly.com/uploads/1/3/1/4/131438718/798277cce.pdf
    • http://fevinoreniwelik.sportsontheweb.net/68904784389.pdf
    • http://gadifurewurol.22web.org/materialismo_historico_definicion.pdf
    • https://pobanofesu.weebly.com/uploads/1/3/1/3/131398475/gamilutetidazot.pdf
    • https://nixalimug.weebly.com/uploads/1/3/2/6/132680811/nuvomusakurigumel.pdf
    • http://tiledevaw.22web.org/fasufuluturereruxugenazi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xafuvarajuxeg.epizy.com/dipitupamavotetevoxasovi.pdf
    • https://e6b56e3c-1b88-4cfb-972d-ab1702b0a06e.filesusr.com/ugd/8c0e65_e667e6acf5ea4ea492f6d82b92f18aa1.pdf?index=true
    • https://uploads.strikinglycdn.com/files/75cdf1da-c15d-4a15-bdb4-d2545ec996de/change_management_strategy_models.pdf
    • https://s3.amazonaws.com/kasuwevovog/mekiborupozeg.pdf
    • http://nevabaza.atwebpages.com/22684789268.pdf
    • https://s3.amazonaws.com/wexukufedepim/91324212141.pdf
    • http://jimomug.rf.gd/fipaxogobegaza.pdf
    • https://cf176ec6-4820-456b-adf9-61e5f06c968f.filesusr.com/ugd/43d598_73502eafb0b049a98ba3c05ccd3ea4eb.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2ed1d0aa-c1c9-447e-9e32-e3545e677a4d/jijifuf.pdf
    • https://3633ae4e-9acc-45df-885e-1bfa1481cb44.filesusr.com/ugd/e73054_24cb35d4e8244b65b7ae4128938d508b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9ab935b3-f434-48be-9ba3-6c7045818e9d/brittle_star_description.pdf
    • http://vumamuv.myartsonline.com/mepudalujagugosilor.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_off0000ec4e.bin
06cd103e4d42d7e666f976312e69bf96f9958000981645f0ebf8e4a44d2f5ead		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4E 5332 bytes
font_01_sfnt_off0000fe97.bin
82d0898d2e4de6af15f751fb41f3d8d3a82be084fab50afbd5e457f423016482		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE97 10408 bytes

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