Malicious PDF — malware analysis report

Static analysis result for SHA-256 fad30e0e9affb510…

MALICIOUS

PDF

86.6 KB Created: 2021-08-13 20:24:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: dfe7c4cf892087e0162ac89cafbccced SHA-1: 8cbb20bb77f24da787637f2433f1187103d310e7 SHA-256: fad30e0e9affb510d3c8a04d2eb5f371452a7fe2e013282169608fd47b66959e
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and multiple external URLs, indicating a malicious intent to redirect users. The presence of a "callback phishing phone lure" heuristic suggests the document may be designed to trick users into calling a fraudulent support line. The ML classifier and ClamAV detection strongly support its malicious nature, likely serving as a phishing or downloader document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://coretry.ru/uplcv?utm_term=how+to+change+input+on+my+element+tv+without+remote PDF link annotation
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/ilbipdir5foh1e05amka14d0d8/25305063594.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/3d3d861c71c55d6fc73ab87e760d174f/41520191299.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/a85f19d5e16cbd09e393cef376412f38/zikipuvuz.pdfIn PDF document text
    • http://gioiacompany.net/images/upload/file/81732157902.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608200805194e---51498392534.pdfIn PDF document text
    • https://www.rongoldmanlaw.com/system/js/back/ckfinder/userfiles/files/pogibemusakipu.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/32214103666.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e618d40a51d---tijumojosekedufizude.pdfIn PDF document text
    • http://stringquartet.biz/web/images/fck/file/26198666069.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/p7ilhf1mtspp66ijucm7i62jkk/69792590873.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/grthohdte8chi12s0omb6foke2/vavovasoxaxupunapi.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/61067757862.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608cacaaeef9b---mebolikusokado.pdfIn PDF document text
    • https://landi-bg.com/images/file/38657806497.pdfIn PDF document text
    • http://chinahongji.com/d/files/xoxowiladamanefegawo.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb1f9736d6---6895567928.pdfIn PDF document text
    • http://denkobarbell.com/_upload/files/pikud.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5469452c74---xovarivof.pdfIn PDF document text
    • http://granitemountainranch.net/userimages/gawetam.pdfIn PDF document text
    • http://dentish.ru/ckfinder/userfiles/files/tuporanizizukunogaxas.pdfIn PDF document text
    • http://wksystems.net/HotelEstimator/userfiles/file/gijexuvuwumuxok.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/27555304553.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/37030029502.pdfIn PDF document text
    • http://karimeh.com/public/userfiles/file/tebajebujozekipufewu.pdfIn PDF document text
    • http://slsnn.ru/content/file/liwafubezamilekakamel.pdfIn PDF document text
    • http://lica-mpt.it/userfiles/files/nagelizagux.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_off0000f05d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10874 11012 bytes
SHA-256: 3a5e98b325c74f9ac6066f904ae89d34b16c7e15ae60acbe61fac89b522d7788
font_02_sfnt_off000121db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121DB 16148 bytes
SHA-256: 44d0ee15155fa1bf3e05a2d64eed9c358080a13919b523a4fca0f2fea56368d9

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