Malicious PDF — malware analysis report

Static analysis result for SHA-256 359fe9fdc1046a86…

MALICIOUS

PDF

92.3 KB Created: 2021-08-03 01:44:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: a5c4dee14e11f749355f0fec2f72fe19 SHA-1: 1b7a2041ec2ef196685f56a14945517bb378a412 SHA-256: 359fe9fdc1046a862c96a415b511544be8499aeb3bbc22e00de5e16be5cb10c9
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing or trojan delivery mechanism. It contains numerous links to external sites, some hosted on compromised CMS platforms, and includes a lure for a download, suggesting an attempt to trick users into executing further malicious content. The presence of embedded URLs and the overall structure indicate a likely attempt to deliver a second-stage payload, possibly related to exploit execution as suggested by one of the URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://drafthe.ru/uplcv?utm_term=roblox+exploit+executor+no+virus PDF link annotation
    • http://xn--80affcyoc0ac1f6a.xn--p1ai/admin/modules/ckeditor/ckfinder/userfiles/files/69932422024.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/4e2de26a18e51b0ff5a1c58a920acd96/gokepazalanuwupesadazuz.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d80918e0ae---serabuxigufunoxinubero.pdfIn PDF document text
    • http://travellightnepal.com/userfiles/file/68376439656.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/791d86c94c5eb73affa43953ebfb0654/67370581090.pdfIn PDF document text
    • https://zegabilisim.com/calisma2/files/uploads/gosujepejoxogi.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8fb494044---56457831650.pdfIn PDF document text
    • https://eingangrad.ch/userfiles/files/zizexifubijaxapi.pdfIn PDF document text
    • http://andrenickels.de/ckfinder/userfiles/files/29723593535.pdfIn PDF document text
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073ca3fb1de2---99392240795.pdfIn PDF document text
    • http://overtonnation.com/clients/f/f9/f97855507a39dfa58978186db9bff07a/File/14474951220.pdfIn PDF document text
    • http://apcmagon.com/userfiles/92857479629.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/wevofoviwowari.pdfIn PDF document text
    • http://vako.vn/app/webroot/uploads/files/gevotufezus.pdfIn PDF document text
    • https://opuntia.eu/wp-content/plugins/super-forms/uploads/php/files/c5f24e7b3e44093ec0365c900c20115b/ditofezaxalufe.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/31fb216d99c204a476ecd098d92529b6/gefogowututi.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/10f40d4f1356770ddd6d25473331a13c/89021644361.pdfIn PDF document text
    • http://soles2walk.cz/data/file/50310382581.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d06629373a9---fopekawi.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/48035043426.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609888e3b880e---nokumenagap.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/5ff2d373c068b2b1f918230f38888ff4/77956501818.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160794f2eb3a7a---83745982906.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/96848s1ilsk9ink2lhsb552ajh/janisitinafaxukopobukusex.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_off0001040f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1040F 10656 bytes
SHA-256: eb325cda70e8761cd0fa4eae964eab0618699bdaff3792bca2c111e79ca978fd
font_01_sfnt_off00011c6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C6A 17460 bytes
SHA-256: d2c9989503c62429690a02dc70540d0e3e5b62c90107baccf5f03072f6ac5ee9
font_02_sfnt_off00014a27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A27 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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