Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b24ef06b918f7b9…

MALICIOUS

PDF

90.6 KB Created: 2021-06-27 02:49:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 17c1c45613f0ffc1a5e0e4ede70f6bfb SHA-1: 3c6f94ca495003f2fb6f6a97966bb93477455841 SHA-256: 0b24ef06b918f7b9d3a4054712b57dd80ea5215d1db81ee3d0584887bb8b7b5d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a large number of links, many pointing to compromised WordPress sites, suggesting it functions as a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • 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.
  • 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://catamma.ru/uplcv?utm_term=nosql+is+a+flexible+database+management+system+that+provides+a+way+to+store+structured+data
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/b5d0977188a65d0e95448b78e39951c6/wazejisudukusegurigorawi.pdf
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094be1171c58---sovudo.pdf
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16074d1e661a48---48229843211.pdf
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/3485a9d8bf92184e591dd73356a77213/gubaxibokujopasaw.pdf
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c40089c7cb9---96575976887.pdf
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4079f51348---75855834631.pdf
    • http://mamnonlittlesun.com/upload/files/5461613808.pdf
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/be2bfdde7bf7fdbc44cf8bb215fe0a64/87811043561.pdf
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16075cd57e6c95---26536783636.pdf
    • http://lt101shop.com/userfiles/files/73733628143.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0058f2dd22---zureladodixopado.pdf
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/97fa250e971f79402e6e2f3abeb806d3/gikexozerowoguzonon.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609a8f27a273b---terop.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c886bd3eb55---15871830125.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/4fa54f19kl4d5vr8ncn1sgc4fl/15408524765.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160732f6343b0c---kizutekowexakakumapedawi.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c3694b8ac76---32184398833.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0578a725da---ditifufa.pdf
    • http://gorisum.net/fckeditor/upload_file/file/naxoraruvebosonavugu.pdf
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a225ad7cda5---borom.pdf
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c71a980d35---navepidigulazemelosadoxuz.pdf
    • http://sieuthibongda.net/ckfinder/userfiles/files/xufilu.pdf
    • http://fitviewer.biz/files/file/73649105487.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/b1f8a9cbff04acd3ee7bf9fccba67d25/bebimunoximixajojuwikip.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbfe.bin
fa58fe8ef82c69837a61a4f565e3c9e4a4a83e4181151c935c316d93543989f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFE 16992 bytes
font_01_sfnt_off00012866.bin
2c9d20c9d6ad8e48a17e270ff06ddb8d5d7971ed86b11fd8463cb43f7dca7694		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12866 11800 bytes
font_02_sfnt_off000143c8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x143C8 16792 bytes

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