Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d0263057e9b0702…

MALICIOUS

PDF

85.5 KB Created: 2021-07-02 06:24:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6e91bedc90e70ec5b69dddf6e676c8a8 SHA-1: 378915248dae73f2d7e1b29d276d7a7f3626be47 SHA-256: 4d0263057e9b07023e8c78f4dc777d30d1c98f4dc8bb3f8fa01325ceffa8c015
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories, suggesting an attempt to lure users to malicious content. The document body is heavily obfuscated and contains no readable text, further supporting its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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 http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8528558f47---kixax.pdf In PDF document text
    • http://xpressup.com/userfiles/file/12868894968.pdfIn PDF document text
    • http://short-story.ru/upload/file/tiwizizujixatalasemebupuf.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3896aa65a3---nubaku.pdfIn PDF document text
    • http://szpital-sulecin.pl/images/fckfiles/file/40203764464.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b9b0408bb---96227951425.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/63176082357.pdfIn PDF document text
    • https://tavio.ru/files/file/87322685010.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/1rck1d2ffn8taou7b4jecdj1lb/95278598617.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160aba70e663a4---xugodejinowokapawewazewu.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/r4kjj2l1q68chvuaui9d1224lb/71973975187.pdfIn PDF document text
    • http://msamericapageant.com/clients/873634/File/96080149690.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/8f7b39d2e25c7924646b39668a32ec73/27918644249.pdfIn PDF document text
    • http://hiddenforrest.net/clients/76790/File/5503327920.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16085d0b60e014---83964849697.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/2c1g5l8cd896odrudlq2th4j39/wugekiwusulurobakilif.pdfIn PDF document text
    • https://rintrans.com/files/vejemovizolaxuzifabu.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/betm4i8kgnelurbm8p7mjnegc4/70433565929.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc180a86d61---xebazawuzuvunez.pdfIn PDF document text
    • http://sashtraayurveda.com/ckfinder/userfiles/files/vuxixa.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb8b23c7e6---35900848119.pdfIn PDF document text
    • http://nexxosrealty.com/userfiles/files/fonakapalo.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609b210ced869---papewe.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/tujidoxoborex.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/9a15f51fe3c230b876fb7a02264661d0/gagobevop.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/163caa156732d11353d55ec1f3dfed5f/24020039266.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=compress+size+of+pdf+file+online+freePDF 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_off0000eca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000104ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BA 10488 bytes
SHA-256: 4dac4e8d55393bde04c119ee53f3e9e5aa6afccd19fc0e415c3c95f8a98bcb40
font_02_sfnt_off00011c7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C7E 16868 bytes
SHA-256: 4a1c96e14afb75efb6788525fc208b4cd8da00d696609eda2846bccb282bc720

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