Malicious PDF — malware analysis report

Static analysis result for SHA-256 94a9fea06aacf75f…

MALICIOUS

PDF

86.6 KB Created: 2021-09-06 21:06:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c107010a4cdc47aee681a9d769323c2a SHA-1: c24bcc72f8c172b4b64c6f1ee64decbbed6dbb8b SHA-256: 94a9fea06aacf75fc53198b838c19b40f33eafd4cf16051e0cf70994fefbf9f6
164 Risk Score

Malware Insights

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

The PDF contains multiple links to compromised WordPress sites and disposable hosting, suggesting an attempt to host malicious files. The presence of a 'download button' heuristic further supports a lure-based attack. ClamAV detection and ML classification confirm the malicious nature of the document, likely serving as a phishing or malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://garglob.ru/uplcv?utm_term=manually+set+up+office+365+outlook+2010 PDF link annotation
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1611d82aab90c1---tiritutukopuvanofewite.pdfIn PDF document text
    • http://bodegaadrover.com/userfiles//imagenes/13619550360.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/bb9qg0r1mhs99on5lm3d4j3o58/wiwutoseporapaxefuvixik.pdfIn PDF document text
    • http://gerastar.com/userfiles/file/bopinalilakemelenuge.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1e15ebe77---44365638195.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/2cebc7dc6c5ccf6b5d203d19282d8f69/minodetixo.pdfIn PDF document text
    • http://mt-filtration.com/uploaded/file/2660963796108f80b1f396.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c69c056db25---61612074209.pdfIn PDF document text
    • https://network-italia.com/file/zorukagulaxasanerapebi.pdfIn PDF document text
    • https://sukhayurveda.in/userfiles/file/19418216178.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/42688365907.pdfIn PDF document text
    • http://phuquytravel.com/nguyenvanlinh/files/likakavodogevawunutori.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adfdb99e740---sawowinawusulajumubojimij.pdfIn PDF document text
    • http://unionnutritech.com/upload/files/88764741200.pdfIn PDF document text
    • http://irina-beha.com/ckfinder/userfiles/files/99670178481.pdfIn PDF document text
    • https://alharithiforcameras.com/ckfinder/userfiles/files/lifaburatedam.pdfIn PDF document text
    • http://straub-online.ch/userfiles/files/jokelorapagalarulusu.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa949696c15---66718691827.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/c0f8fabb2331fb6a978958ddeeceff2d/kiwivifanesodukaporoxadiw.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099a2e1d3841---93869567474.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/4b7873eb4b910da27c2bfdad63b92cf8/zugovidore.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072a14163097---foluvavutufako.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c3fee2d238---beresupugonenugaz.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb5d0e39b2---napufega.pdfIn PDF document text
    • http://prospekt-rostov.ru/ckfinder/userfiles/files/52520019170.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/66811073960.pdfIn PDF document text
    • https://community.spicoworks.com/how_toIn 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_off0000e8f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F5 18148 bytes
SHA-256: 25f7bd53bad1b8d4b45fe2bc6c4f08ff715337a170f468b81c2593cfe7c9d254
font_01_sfnt_off0001178f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1178F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012fa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FA6 11440 bytes
SHA-256: eb92664caff983764f8a4303854f5dad4686aa2f48d81cd29c61caa4e537c06f

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