Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ef24c5f1c7481a9…

MALICIOUS

PDF

77.9 KB Created: 2021-08-22 02:56:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 6dc129c869100ce0924b9fb1126c6ca1 SHA-1: d31034f23afa2c5b6ae2f4dcf0189adfc9631bf5 SHA-256: 5ef24c5f1c7481a9766f9d3fc37bf62ef7474332668d807dc587a3cba7bf4d84
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document functions as a link farm, directing users to numerous external websites, some hosted on compromised CMS platforms. The presence of embedded URLs and the overall structure suggest an attempt to trick users into visiting potentially harmful sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9829

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 http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/88338545417.pdf In PDF document text
    • https://allegypttours.net/userfiles/files/96688353320.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/495a5114fbbd73be890aeb0c913f4162/83007434304.pdfIn PDF document text
    • http://bkm-market.net/userfiles/file/dulotofiv.pdfIn PDF document text
    • https://apotekatia.ba/fajlovi/wobarazoneve.pdfIn PDF document text
    • http://robertfeinberglaw.com/images/edit_images/file/petojanigivo.pdfIn PDF document text
    • https://pensionradvanice.cz/res/file/14900585121.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/2l0h6t12nhn2e6d8t5tap8d6p4/masixilukidobutokunuzavu.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e0d4b5be0---65529792387.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d41f1c7e5---80881398963.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ffb285242c---pivovazemigusakuzilup.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/tu69dgmuo14hp5te2ha1rdhj0i/84117635182.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/vsiruvmitc8n8sdipapvqtbo93/wewogatedivibajasi.pdfIn PDF document text
    • http://nakatka.com/files/file/pixagasolunejepukix.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/1937529729.pdfIn PDF document text
    • http://dcbestwings.com/uploads/files/45607722517.pdfIn PDF document text
    • https://ymvii.com/admin/upload/files/moboluzexagavazo.pdfIn PDF document text
    • http://murphysbeads.com/clients/54316/File/47053186362.pdfIn PDF document text
    • https://tannhatviet.vn/upload/files/duporefatupixiravexalevu.pdfIn PDF document text
    • https://shidoremicrosys.com/media/86294211772.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/xikipusesulezukadi.pdfIn PDF document text
    • http://jeremypourstarlight.com/clients/5/53/539822683240d2210db56c0084569a8b/File/5400309339.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/b4hp4mvt6uvflm1jik54kd0097/finan.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec365b09b9---52655358275.pdfIn PDF document text
    • https://dentalrud.com/userfiles/file/sufosazeroresawew.pdfIn PDF document text
    • https://mfdesign.hu/files/file/85039532152.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=patterning+grade+2+worksheets+pdfPDF link annotation
    • 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_off0000cec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEC5 16216 bytes
SHA-256: 8af1f0418f916e45dff859105c49ab82261fc0f4f31391ddfee1c05db57aa93e
font_01_sfnt_off0000f8a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A6 11028 bytes
SHA-256: bcd07e4e31ff093e49d6c4c67639a57e2f1a382fc57e847fba44976c0ada04ed
font_02_sfnt_off00011234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11234 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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