Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbf1c8be24aefc83…

MALICIOUS

PDF

288.4 KB Created: 2021-03-17 12:56:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1becfc6b5db90daeeef166ed0efe6f33 SHA-1: d41c352b70f77b74b0f2b98d87a71482db6a8758 SHA-256: dbf1c8be24aefc836016eeaf1c94c75ad983154c4933fc30ae0700ab7002d86a
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI that redirects to a URL associated with phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for credential harvesting or further malware delivery. The document body, though heavily obfuscated, suggests a lure related to Mexican history to mask the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9901

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://xezojetit.ru/strik?utm_term=historia+de+mexico+independencia+pdf
    • http://firstsecu-paypal.com/xuzipesisimejp3g1.pdf
    • http://smartbright.club/what_are_some_unique_baby_boy_namesaxi12.pdf
    • https://cdn-cms.f-static.net/uploads/4460063/normal_6038238c8c64f.pdf
    • https://cdn-cms.f-static.net/uploads/4404955/normal_601f7b0ae1eb5.pdf
    • https://sadixudodexoz.weebly.com/uploads/1/3/4/2/134234615/d8b77bbd474d4.pdf
    • http://pafekusiwajida.66ghz.com/19027244684.pdf
    • http://salearea.pro/256441026409a7q5.pdf
    • https://kezunegewekal.weebly.com/uploads/1/3/1/4/131483031/23e404.pdf
    • https://kifosaxuwaf.weebly.com/uploads/1/3/4/0/134016965/3002380.pdf
    • https://cdn-cms.f-static.net/uploads/4390373/normal_6037a8a4a001e.pdf
    • https://cdn-cms.f-static.net/uploads/4499005/normal_600b1d3b539a7.pdf
    • http://prognoz-football.club/alimentos_ricos_en_calcio_mexicooe7nl.pdf
    • https://static.s123-cdn-static.com/uploads/4452607/normal_5ff7569475eca.pdf
    • https://vilinumatilaji.weebly.com/uploads/1/3/2/7/132740241/mezijisezore.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fb075467-9d00-46c6-93ac-2b777f5e584b.filesusr.com/ugd/8bcd66_4688aed1b09949f4a9761b26a812f774.pdf?index=true
    • http://dupetomumipur.rf.gd/wavatufinuvaxa.pdf
    • http://jatojitax.rf.gd/sea_scout_uniform_badge_position.pdf
    • https://uploads.strikinglycdn.com/files/245faf84-d5c4-4033-88d5-4eb18d40f4bb/tosowabelovema.pdf
    • https://dcc20dec-0195-4543-b617-cfb82efd15f0.filesusr.com/ugd/30ea26_d11e90d19eca4505b1a0b7186bf4210f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b63b3bbe-80b6-42ed-8e55-aa96b53390eb/aprender_ingles_online_para_nios_gratis.pdf
    • https://74a5c9af-61bb-4d76-9351-4d02c0bf652a.filesusr.com/ugd/e33828_ba0a58348d774c3888e68063628eb660.pdf?index=true
    • https://f72e0e13-a873-49c5-9cb5-3c2848b8c5b2.filesusr.com/ugd/f8ba4b_33c978787c8a4aecba0dff034147a254.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000435e2.bin
936f3d957dfe04a78b28f3ff6233b657df8bafe77979f63c4a35c0d110311ef2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x435E2 5296 bytes
font_01_sfnt_off000447cf.bin
536688a9b7a5ab760dd27f573ea14ad1f0a9cd4f28681a76e7b992940e6ea225		 pdf-font-stream PDF embedded font (sfnt) at offset 0x447CF 12988 bytes

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