Malicious PDF — malware analysis report

Static analysis result for SHA-256 04201c0d6c2ecc5f…

MALICIOUS

PDF

101.8 KB Created: 2021-06-27 20:49:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5acc00926fd15b2d2dfe401e3b2158a8 SHA-1: cc18baf86555bf65acb3129d54a6512a0f8d3194 SHA-256: 04201c0d6c2ecc5ff4b0ce15a8d04223c434d7010b23ab265fff30a46158f61b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The 'SE_CLICKFIX' heuristic indicates social engineering tactics to trick users into executing commands, likely to download and execute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://infrive.ru/uplcv?utm_term=windows+10+convert+gpt+to+mbr+without+data+loss PDF link annotation
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/2va2aph1fo373m9g490jkvqo6n/44082795086.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/ikr347q5fs50hod8agh0t4c9r3/xujinuzitemok.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a53d7bd154f---98696707764.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/6ac6abeddab5193cc9716fc9e72305bd/sotolesawaziv.pdfIn PDF document text
    • http://slsnn.ru/content/file/nuxujixododota.pdfIn PDF document text
    • http://thuaphatlailongthanh.com/upload/contentFile/minhchau/file/wevisanumiwufuxeridu.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b40e2cd2921---46008231954.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/kamopazugewusotakedimiki.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/a079bec201f2a8e8750799302b015af5/35706105236.pdfIn PDF document text
    • http://kawoka.com/userfiles/file/dufazetoxukasovetijura.pdfIn PDF document text
    • http://mega.kz/media/upload/files/38129774024.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/ghb0ajv5enark9o2s9e0qpf5o7/pabonirosonabo.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/42b2753f8b827071725b832beafea3c8/91539455596.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/42903867474.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d178aecb49---kefevo.pdfIn PDF document text
    • http://arch-teh.com/pic/userfile/89961269968.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2080a6768---40559089097.pdfIn PDF document text
    • http://talleresjpg.es/img/file/66430258595.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/vulobevupuwubafaviwok.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/24548044254.pdfIn PDF document text
    • http://446888.top/userfiles/file/mimelofefenu.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c93a0def3d---29747079140.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11646 2844 bytes
SHA-256: 5cfbed54ed053658ae3f2cfda77103405c5e97763e1a5a879fb485198ac54097
font_01_sfnt_off000121e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121E0 11520 bytes
SHA-256: 16144df133b8ff4f554d8bdddb0b6dee70f361266e4fe39bf3cfb56027ab3ca5
font_02_sfnt_off00013c9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C9C 20888 bytes
SHA-256: 5a4e89e48b38cf5dde1660dbab98395b6c164ee55e9969e18a6286fb2e590c53
font_03_sfnt_off00016f3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F3D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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