Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e6ae5d2e05c310c…

MALICIOUS

PDF

78.1 KB Created: 2021-09-06 20:47:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: db2fb73277b8cf3002fb80c9fbd53737 SHA-1: 4408fd28c249aa007046c4dbc5b94b95211f2eec SHA-256: 4e6ae5d2e05c310cfed38117d852fd2d5d7ed896c308277e8199c4203bb61663
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The presence of numerous external URIs, many hosted on compromised CMS upload directories, suggests a link farm designed to redirect users to malicious content. The 'SE_DOWNLOAD_BUTTON' heuristic further indicates a lure to download a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://allytemp.ru/uplcv?utm_term=imamia+jantri+2018+pdf+read+online PDF link annotation
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b40f86d7e85---314303943.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/jimovijuwamujosiwogov.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/60022786802.pdfIn PDF document text
    • http://oroblupiscine.it/userfiles/files/levanisuzobitatakeguxum.pdfIn PDF document text
    • http://www.saito-ken.jp/userdata/file/50052072295.pdfIn PDF document text
    • http://everest-c.ru/ckfinder/userfiles/files/voketonilafajig.pdfIn PDF document text
    • http://www.siscbolivia.com/admin/uploaded/fck/file/24201637700.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/5920c7b35ec81faf29d9c80a25ca2e10/xabanatej.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160afd1804a18a---nugusigukona.pdfIn PDF document text
    • https://thingstodobahrain.net/ckfinder/userfiles/files/rokoduxafesobomapopi.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073a5af5dea7---50509623978.pdfIn PDF document text
    • http://laulumaja.fi/ckfinder/userfiles/files/74464734438.pdfIn PDF document text
    • https://coatielectronica.com/files/4295146266.pdfIn PDF document text
    • http://mail-business.ru/uploads/file/13853795603.pdfIn PDF document text
    • http://bbfederico2.net/userfiles/file/jumurosises.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609595d749586---90156694917.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16125825b97734---15442263471.pdfIn PDF document text
    • http://remobudostol.pl/pliki/vamusumiwimodeludi.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/t0p2jk987d7fj73hf3meh721pb/fawapux.pdfIn PDF document text
    • http://somersetcountybar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/57644626569.pdfIn PDF document text
    • http://vogiantinhmach.com/media/ftp/file/15357543899.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///bolagujaja.pdfIn PDF document text
    • https://lee-trading.tw/archive/upload/files/nalixurenunizu.pdfIn PDF document text
    • http://solemarservizi.it/userfiles/files/6287347249.pdfIn PDF document text
    • http://onnetsolution.in/userfiles/file/falefovipepililenujizelol.pdfIn PDF document text
    • https://ancoraeducacion.com/images/tageluwuzedu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5C3 11076 bytes
SHA-256: 256e5bb8595fd5b3e15ba5d7adf7bbf2db8feca4bc516211b56e440d8d28e543
font_01_sfnt_off0000df87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF87 19416 bytes
SHA-256: 07955235a69298b0594e07c7128a425da51148e88170e779f2c276208717dcef
font_02_sfnt_off000112ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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