Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba90243e7616e741…

MALICIOUS

PDF

81.5 KB Created: 2021-07-01 09:57:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a612a3979fde9a66a3022139fa962e38 SHA-1: 514cc4b91a650e1bf1d5574209119cdff8099c3c SHA-256: ba90243e7616e741af78d02f9c01b08c1eb3be498fcaddfbac0a6b4a01686a62
204 Risk Score

Malware Insights

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

This PDF contains embedded JavaScript and multiple external URIs, many pointing to compromised CMS upload directories, suggesting it's part of a phishing or malware distribution scheme. The 'Password-protected archive handoff' heuristic indicates the document likely instructs the user to download an archive, which is often used to bypass security scanning. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://garglob.ru/uplcv?utm_term=conversation+between+travel+agent+and+customer
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609852864c544---tovipuxosovavixi.pdf
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f17bb80e6---54490743095.pdf
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/9bf1ea22f7caf0efc3d500d2ebdd52c3/78601460320.pdf
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/4bc4efb386929ea79d01b3777b0f6faa/58526599022.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c24ebd23e69---78247161327.pdf
    • http://khodahoanglang.com/admin/webroot/upload/image/files/73447590998.pdf
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e04b48d66a---14246282131.pdf
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/042ff19b87055fa673dd8e128930603f/74823031889.pdf
    • https://ferado.vn/userfiles/file/kebazuganupikebexi.pdf
    • http://sieuthibongda.net/ckfinder/userfiles/files/tusutagonoribugogowa.pdf
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0357168a2a---83050583195.pdf
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/81mrdpbremdk9q1ohlobvg6ae5/25075017474.pdf
    • https://binarbaidtrading.com/public_html/userfiles/file/zabajazuvitepofilamo.pdf
    • http://travelshops.pl/userfiles/file/96392501580.pdf
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/11fae8035aa7603c6a729fbb6581fcef/59453352103.pdf
    • http://vincentpopetutoring.com/clients/d/dd/dd6b7bcf94cac99d3bed97cf8166637b/File/lalaminemiwavapebefaxo.pdf
    • https://thedestinbeachhouses.com/wp-content/plugins/super-forms/uploads/php/files/8d30ef874f3559baa00c9961fd9ae322/16970537772.pdf
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/eh8e1tjffk06e20j95ftscc252/bivunimikejukexobagesokin.pdf
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/e6d71f8ca45b63aa97b129d76cc7b924/89128551029.pdf
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/5f6db5a5bea129f9ca8f04d882f8cbc7/96967631096.pdf
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ba68d3d65be---totolevisazifiwet.pdf
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/17964078796.pdf
    • http://pappteam.hu/userfiles/file/judasozufajotow.pdf
    • http://arserwood.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/2105031510050259381h066t.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160787f6b0c929---29091569075.pdf
    • https://koncnc.com/genelresimler/file/rasinezimebazijofoleni.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_off0000d7bd.bin
463e0a2fc45dcadffd5ed92153b08e9e5a581924091a465ca92a4ca494e64de6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BD 11136 bytes
font_01_sfnt_off0000f1a8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A8 16792 bytes
font_02_sfnt_off000109ba.bin
b546ec25abba3a63c1cd01d43968c214927953229d41cff0499a95234e82e0d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109BA 17504 bytes

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