Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2e2d459d196c487…

MALICIOUS

PDF

83.5 KB Created: 2021-07-06 18:45:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 734b4fe0f4c4a5570e077d2957925325 SHA-1: 67b153c7997d756c91cac3d47d2f94aeeea002d8 SHA-256: b2e2d459d196c487230916e178857944a5b3d0bcdb2b5c466d0487daac677da3
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload directories and other potentially malicious sites. The primary purpose appears to be redirecting users to external, untrusted content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 6

  • 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.
  • 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://huntic.ru/uplcv?utm_term=problem+solving+case+studies+with+solutions+pdf PDF link annotation
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1609b306cddd9d---wuwoguzomotemuluwina.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-5-16/20210516223433515931.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5753daf115b26ffdcb4f30cf2afe9e3c/80643068616.pdfIn PDF document text
    • http://cerezolorente.com/files/cerezolorente/_repo/file/59014148526.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607792ec02aaf---zizuvujubulorox.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/06/23/file/zuvufajilekajakapi.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/eb6b3cd488d63c2e59585dd62ae2227c/87492077148.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a182a58516f---32448512900.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f4b1ee699---dufifuxonimedeloruvasu.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/44b0f36a680413e6cb21ae5784557503/93478439502.pdfIn PDF document text
    • http://kiemtoanhaiphong.vn/upload/files/62064618854.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073a6d888bd4---32964677332.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/vazuz.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/ca64ff468d1b4b508d539b9becc33747/luxifixufiduvoga.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f13540c706---95175629265.pdfIn PDF document text
    • http://duonglaohanoi.com/userfiles/file/lokawipuwafipi.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/neboduwulas.pdfIn PDF document text
    • http://1hozain.ru/files/userfiles/files/80679680063.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/zivat.pdfIn PDF document text
    • https://cakenflowersonline.com/userfiles/file/gupoxikudijota.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/5f71a81425c410529ff5e1248a9c2723/seweginexonelipobugawunaw.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_off0000e45d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE45D 11460 bytes
SHA-256: 159179c08dc6146462936ffe08f51925e5252f96f6f81ad789a7a6da0c81f872
font_01_sfnt_off0000fee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE5 16320 bytes
SHA-256: 278aa94918eef2bb1d2fd2b0634bbdd5e8abeda10136c8c0658e6091e3366477
font_02_sfnt_off000128db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.