Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb2a60a3672150c3…

MALICIOUS

PDF

72.8 KB Created: 2021-07-23 01:44:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 49d1a3afadabb2291db3cd0cb37538a4 SHA-1: 92a3d1edcd68a38359836dcc424c2c7a8d1f7b2c SHA-256: fb2a60a3672150c3994a91ca17fa9a211a6d7d6135684a6207f0d927e5a78fa8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous embedded URLs pointing to various domains, some of which appear to be hosted on compromised CMS upload storage or disposable hosting. The primary function appears to be directing users to external resources, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://mtntoproyalshihtzus.com/clients/4/42/42f4769cb4f2467af64fea76c5682520/File/91386444939.pdf In PDF document text
    • http://archpiudue.com/userfiles/files/voxuziwuvasatujaxo.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8004a90222---15832850911.pdfIn PDF document text
    • https://namlongadc.vn/uploads/news/files/48357367412.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/66126676372.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/d9e2367d39bfa7473ff8838ca98ee3df/44242319332.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/8ca20c60446a32f772ee58dfd30e0465/jafupowosasuvixevowobuk.pdfIn PDF document text
    • http://mispuntossaga.com/campannas/file/4582935429.pdfIn PDF document text
    • http://retailcop.ca/files/xaxulukivaxutasegofej.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa7e770088---74259110475.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608cfb8fed4f2---44487017954.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160720c0da4c13---17796375131.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1606cb3a96e198---xupubiminalojizanep.pdfIn PDF document text
    • http://pi-consulting.ch/download/76932222952.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/6ai2kculcah87es5d1o6ro0lb0/wiboxodozolasakigotarekel.pdfIn PDF document text
    • http://johnlillylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/widipefudowo.pdfIn PDF document text
    • https://greenlakepaint.com/ckfinder/userfiles/files/lowepolimeso.pdfIn PDF document text
    • http://rialta.ie/userfiles/files/mefazenofakijumubew.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/xakuvupefomimupiror.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/04e69562c857869eeaaf61a73f5d7a4f/gemajuso.pdfIn PDF document text
    • https://murderescape.com/wp-content/plugins/super-forms/uploads/php/files/fe99b1fe148d6e01934761958f16917f/57337779404.pdfIn PDF document text
    • http://szakkepzosiklos.hu/upload/file/40067239955.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=yes+no+illusionPDF 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_off0000bd1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD1F 9824 bytes
SHA-256: 7cbae604955b9e553e519a1b8b4319b4e92d32f8b46d3c4c266fcf2d8d1957cb
font_01_sfnt_off0000d2c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C7 16448 bytes
SHA-256: fe29f8d22da595f3bd9c93aceb9f88ad2c72b453b6a5492cc7b5a46971f48187
font_02_sfnt_off0000fdd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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