Malicious PDF — malware analysis report

Static analysis result for SHA-256 d764975e4604fa58…

MALICIOUS

PDF

85.9 KB Created: 2021-09-19 23:19:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ecc2525f85a08e6141fe9f46a0bd5434 SHA-1: cf045d2995c842638bef0bd9ee33578372bba6c6 SHA-256: d764975e4604fa5873ff72c53287bb43071b85b4d7fad7a4e332795560bf0712
196 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The 'SE_LOLBIN_RUN_COMMAND' heuristic suggests the document may attempt to execute commands, likely to download and run further malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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 https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/aa897fdda658219ed3e2466d8c9a133b/purajavodoreloluj.pdf In PDF document text
    • https://pre-www.bridge-college.com/uploaded/ckeditor/files/gosexizoxope.pdfIn PDF document text
    • https://speakingparrot.com/upload/ckfinder/files/51246153266.pdfIn PDF document text
    • http://qdcmd.com/data/files/45891335413.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/b880b6910730cb6b7d46e7a44d4845ab/baloripemigafaw.pdfIn PDF document text
    • http://musicpark-live.de/userfiles/file/papuzotavu.pdfIn macro / runtime command snippet
    • https://mots.alaxarxa.cat/cmsimple/images/file/48158339086.pdfIn PDF document text
    • http://sanraimundo.cl/dyn/uploads/file/fetugibifinisabitubiva.pdfIn PDF document text
    • https://prcomponents.com/ckfinder/userfiles/files/928438321.pdfIn PDF document text
    • http://alt-1c.ru/userfiles/file/xijejosonemixe.pdfIn PDF document text
    • http://ngocphuocjsc.com/public/default/ckeditor/files/wukupawibasalusazejaji.pdfIn PDF document text
    • https://footballsod.com/images/ck-uploads/files/xekonokokumipoxidepawipuv.pdfIn PDF document text
    • http://cka-shiba.com/ckfinder/userfiles/files/52975893867.pdfIn PDF document text
    • http://www.sudeshnamaulik.com/fckimages/file/bovelekiruforanedodibenum.pdfIn PDF document text
    • https://cakenflowersonline.com/userfiles/file/83050288177.pdfIn PDF document text
    • http://ymjgolf.com/file_media/file_image/file/66525163915.pdfIn PDF document text
    • http://abwfinlay.com/uploads/files/36682315083.pdfIn PDF document text
    • https://adian.eus/files/galeria/files/77643995687.pdfIn PDF document text
    • http://mydreamtuscanwedding.com/editor_up/54419273152.pdfIn PDF document text
    • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/6806248599.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/161308512788f6---93550702120.pdfIn PDF document text
    • https://rafaela-motores.com/userfiles/file/4665062225.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/16143dfcdafd3b---55485582712.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/pinimawizezato.pdfIn PDF document text
    • https://gz-topstar.com/wpIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=sex+games+for+android+apkPDF 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_off0000ec79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC79 17172 bytes
SHA-256: 9737c403139748fdb3c2f8f02ec8a4ff7b4f73d498fae592192072e46a3da118
font_01_sfnt_off000118e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000130f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130F8 10964 bytes
SHA-256: 1490283ffe947351cdf630096daaa9f2dd209b7573048bf554591e7adce63528

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