Malicious PDF — malware analysis report

Static analysis result for SHA-256 800e67d00cc8d47a…

MALICIOUS

PDF

95.0 KB Created: 2021-07-09 02:38:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 2ed6de29a00819eb96d9061d7d41469b SHA-1: 2c1f334d66732e782bf2853cad18f1eac6cc6142 SHA-256: 800e67d00cc8d47a48b2bda9641bae6eef4238ce8b6e4b479b5c98714fb7675c
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting an attempt to lure users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The file's structure and link farm nature align with techniques used to obscure malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 6

  • 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.
  • 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://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160ab12ccf231b---lomomiwipuwereguxu.pdf In PDF document text
    • http://tuttotop.com/userfiles/files/19452837743.pdfIn PDF document text
    • http://netinflux.net/userfiles/file/33745235807.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/kixasuxiwugekape.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/ritoxitumigafix.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/d4d3h0jdrpv5f8erea539ft873/babop.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/xosutiwigevopulutetusol.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608a88c886e4e---28521260045.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609de541e8012.pdfIn PDF document text
    • http://charivne.info/images/file/85369421564.pdfIn PDF document text
    • http://turagent007.ru/userfiles/file/33565493662.pdfIn PDF document text
    • http://teormech.ru/teormech/usrimg/file/36292043607.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/43095746889.pdfIn PDF document text
    • http://studiolegalebisantis.it/userfiles/files/24293795218.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607caad22a964---venojowal.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/h93272bfj21bigmghn6sn2c56r/rewelosadejubefivavogawij.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090f93f3e5c1---43373382993.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/23912c0329f92c0d5b28bb34cec25807/berafeta.pdfIn PDF document text
    • http://ozdoby-betonowe21.pl/Upload/file/79683092178.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/e33a1d44cb9f1e92f19a984541ffad5f/guroroladoneginadim.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/aa3acb28310e3dac60cb67d9a6bcb459/72283382395.pdfIn PDF document text
    • http://drukarnia-skawina.pl/app/webroot/media/files/kivokarufubojasazite.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=surface+chemistry+class+12+notes+pdf+downloadPDF 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_off00010c57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001246e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1246E 11432 bytes
SHA-256: 610b5ff0086e18e99f989a0a3c4420bbe748e0f715ea98b37b1728f9400ed376
font_02_sfnt_off00013f63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F63 17796 bytes
SHA-256: af08946628a10510550b5bacb7c17c2ca009c54d94f1216809185d38a3ce7e5c

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