Malicious PDF — malware analysis report

Static analysis result for SHA-256 60d1f2fd1bff48de…

MALICIOUS

PDF

81.5 KB Created: 2021-09-12 00:34:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d0f83d7a4aa0f4e4c5227e339b3a8913 SHA-1: fc14796505e72e8b7a21927a66dacab85eb20236 SHA-256: 60d1f2fd1bff48def1c4a86fc9e4b10428569ee7a406e82f9d4302d347257bc2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URIs pointing to compromised WordPress sites, indicating a link farm designed to host or redirect to malicious content. The presence of embedded JavaScript and ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely related to phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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.
  • 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://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132c7652aa2d---88234662493.pdf In PDF document text
    • http://yourhealthyanswer.com/ckfinder/userfiles/files/90457779743.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/salagetetozuje.pdfIn PDF document text
    • http://www.leasebridge.com/CKUPimg/files/meborefuribika.pdfIn PDF document text
    • http://theonejsc.com/userfiles/file/49657429752.pdfIn PDF document text
    • http://chinasoftcore.com/userfiles/file///memituxuxe.pdfIn PDF document text
    • https://dabanbep.tanglehadong.com/upload/files/vojaxa.pdfIn PDF document text
    • http://burningspearmarketplace.com/js/ckfinder/userfiles/files/13761832541.pdfIn PDF document text
    • http://www.johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/93984970810.pdfIn PDF document text
    • http://kleinschaden-expert.com/userfiles/file/24738887661.pdfIn PDF document text
    • http://thaide.org/userfiles/file/ridugademem.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/cd24gc55647qj8jvq37d3vkjk6/5238254717.pdfIn PDF document text
    • https://meganimal.pt/site/upload/file/funabosufolowenokitapizu.pdfIn PDF document text
    • http://cualuoiskydoor.com/webroot/img/files/kogajegobixuwelofi.pdfIn PDF document text
    • http://mediaworld.pro/ckfinder/userfiles/files/xuforapezexesexedot.pdfIn PDF document text
    • http://shangrilayunnan.com/ckfinder/userfiles/files/ruvatutij.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/161314448228c1---47553796494.pdfIn PDF document text
    • https://bc2000.order-pro.com/ckfinder/userfiles/files/76521799781.pdfIn PDF document text
    • http://poliinc.com/upload/files/91671177295.pdfIn PDF document text
    • http://euroambulans.pl/userfiles/file/64930803030.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/16136295065ea0---bunufitedugazat.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d1db103679---4522655118.pdfIn PDF document text
    • http://yachtales.net/admin/userfiles/files/litakulisefelovejujexu.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/ef1bc576c590ef4befea0eed55e0f26d/58219000555.pdfIn PDF document text
    • http://373113.linker.tw/files/16904106541.pdfIn PDF document text
    • https://thietbidiensino.vn/media/ftp/file/69965716772.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=chevrolet+mylink+android+autoPDF 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_off0000d798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD798 10748 bytes
SHA-256: f73c086494304c48968e05629581e4004d39dbb686fe3ea75ee81757d5cc0f8b
font_01_sfnt_off0000f028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF028 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001083a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1083A 18480 bytes
SHA-256: 95a8c4161a719e2152c4d4e9569944e967ed2c23adffb5293f4d1887497dd467

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