Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d41f3de02eb8ebb…

MALICIOUS

PDF

95.8 KB Created: 2021-03-23 22:50:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0656f8fe479d7968eb79e4fcca01b481 SHA-1: d380e4cd569b1c6fa0b3c6ce45f877d06a390a94 SHA-256: 4d41f3de02eb8ebbefc827018d29e69a89a6c0d80404dd58abff43b973a62f32
96 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. The presence of an external URI pointing to 'resalured.ru' suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to trick users into visiting a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://resalured.ru/strik?utm_term=soundarya+lahari+telugu+book+pdf
    • https://static.s123-cdn-static.com/uploads/4454302/normal_60089fd42af8d.pdf
    • https://cdn.sqhk.co/bivuwusim/Ljgiegf/6927169533.pdf
    • https://static.s123-cdn-static.com/uploads/4460263/normal_5ffad52c8dab5.pdf
    • https://static.s123-cdn-static.com/uploads/4415334/normal_5fde65ee04fe6.pdf
    • https://cdn.sqhk.co/gijimexuv/xNzCjgd/pulsera_smartband_xiaomi_mi_band_4.pdf
    • https://cdn-cms.f-static.net/uploads/4403531/normal_6040fe7bd79d1.pdf
    • https://kazofinuso.weebly.com/uploads/1/3/4/3/134369681/4766537.pdf
    • https://kizevopizimi.weebly.com/uploads/1/3/5/3/135351298/bezivezitu-fevenafawowip-toxuzoxot-jaman.pdf
    • https://zedasadexim.weebly.com/uploads/1/3/0/7/130775923/f683d1e77a6.pdf
    • https://pipedexow.weebly.com/uploads/1/3/4/8/134852679/9349505.pdf
    • https://cdn.sqhk.co/bopesajan/TGs0ivZ/pakibogenogotezomuledeko.pdf
    • https://cdn-cms.f-static.net/uploads/4392452/normal_603d0ab299630.pdf
    • https://cdn-cms.f-static.net/uploads/4420765/normal_601dcd6bc5534.pdf
    • https://cdn-cms.f-static.net/uploads/4402706/normal_600a1d51abeb5.pdf
    • https://cdn-cms.f-static.net/uploads/4387571/normal_60230188b774f.pdf
    • https://static.s123-cdn-static.com/uploads/4405437/normal_5ff00202d4209.pdf
    • https://cdn.sqhk.co/rekubapapup/jdjfGib/11527628592.pdf
    • https://xawoveramexu.weebly.com/uploads/1/3/4/0/134095940/jiserov-ruzitilixu-nugila.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://ca3ec1ac-6ff7-4c8f-ae0f-86a30d86e335.filesusr.com/ugd/3615fb_d61f8958fe924c63baad3b3d1e059984.pdf?index=true
    • https://s3.amazonaws.com/fexuror/come_recuperare_messaggi_whatsapp_cancellati_android.pdf
    • https://f72b89be-0fa6-41ee-8162-331329ef78ce.filesusr.com/ugd/95089d_7c92fecf7a614af0b91a0a563ff7b8dc.pdf?index=true
    • https://s3.amazonaws.com/suxugipipolazog/cien_aos_de_soledad_gabriel_garcia_marquez_resea.pdf
    • https://f2d828cf-06d9-46ea-85af-d88b0bc20d44.filesusr.com/ugd/501a20_42c26de9444640bfaf9d92b950dbf2ed.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_off0000d57b.bin
f127a504a95477d7e20c983b463db9c4b2938091ab28e9a03ed3f4b0006de7d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD57B 5532 bytes
font_01_sfnt_off0000e84b.bin
3e75c8acf97c966e07165ba12797f1fb5df36a3709150173de35a61c317a8b37		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE84B 40376 bytes
font_02_sfnt_off000135ed.bin
1b11493ff5c0843166adf378c174336284158212b6cfa59f5fd4d86b21fe5e93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x135ED 11200 bytes
font_03_sfnt_off00015bb7.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15BB7 16164 bytes

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