Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ce29526b958d407…

MALICIOUS

PDF

85.1 KB Created: 2021-08-04 10:01:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: d122d22b1c033f571d4436cb5c61735a SHA-1: b136ae0abbbcef677ad7ca39c4931c918f41ee95 SHA-256: 2ce29526b958d407de25edba1853e9378b2a59c6ed3b2397cd39aa2c9e6dd7c6
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee1211bbb5---kijolisevimidov.pdf In PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/3d57fd044ca322f256c35c610de98d7b/97508293532.pdfIn PDF document text
    • https://cnc-ar.ro/files/file/wivexajozuxavirekikupag.pdfIn PDF document text
    • http://fotofolliasanlazzaro.it/userfiles/files/ketuxapobinonugavesedolum.pdfIn PDF document text
    • http://it-hair.com/userfiles/47619789154.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/3ae221e10eef8b8a4aa398c10ddf975e/17429868585.pdfIn PDF document text
    • http://lex-ter.ru/admin/ckfinder/userfiles/files/11582263308.pdfIn PDF document text
    • http://quincy.pl/ckfinder/userfiles/files/20854146920.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab9f8e73cd---95036505974.pdfIn PDF document text
    • https://vanvoorst.info/uploaded/file/5652961196.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a1974e87659---zosemi.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160763f0f17ed3---86226198641.pdfIn PDF document text
    • http://rucodelniza.ru/userfiles/file/10766105846.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/28f19bcaf2acfae8d7c9c10a5fafe976/97152681832.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d5a16fb9c448649e67629b8f4fb02401/wolasidokiwofipajejof.pdfIn PDF document text
    • http://bjbtrh.com/files/pic/file/57560910532.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/8fdfbdc28c780af6a27380d7c3b90b0c/sarimozazimug.pdfIn PDF document text
    • https://drrajanmahtani.com/userfiles/files/20525360649.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ee714d5a2---sopezogowiwosudabapip.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6885c3c1e---88400474858.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/c0fe1aee87d1fd9182b7cdbb4c97bec1/57701655478.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/edb5b1b7838dce6592fe3fa417309473/fuvenipizokeretev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=how+to+pair+bose+remote+with+tvPDF 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_off0000e9f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10210 10652 bytes
SHA-256: 20ca178d97aed9b2d8811c88c2b09a6a66c0e17aa391b9dde3ec8bf68209a3e2
font_02_sfnt_off00011a4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A4A 16736 bytes
SHA-256: d3eefe5ab48514194caa0c96769c1810c9094968bbc160399e82fff30b9edf68

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