Malicious PDF — malware analysis report

Static analysis result for SHA-256 49188f6331a7b398…

MALICIOUS

PDF

70.1 KB Created: 2021-09-03 20:50:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: fe08719abde8f7803b21f1edc683d698 SHA-1: a14677a7d6a03ff9a53246b5bb0fa86050a7f1c1 SHA-256: 49188f6331a7b39849a60a35167f6b4161c0c598aa35bacd383b8bb779d497ae
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://hurtowniagrafit.pl/userfiles/file/dowubebadisozudakelejug.pdf In PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/60838086699.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad16b601115---1326083004.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/8136ce490697bea3d8587fa31ed90756/xanefunagawuzorujoret.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/1rb6kvcatead7eeo11mmckimdc/tokom.pdfIn PDF document text
    • https://srmhomes.com/images/bulk_images/files/zojoteridanasopadar.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b0461b514---wapoxizozumaborujagomogo.pdfIn PDF document text
    • https://aluminiosarla.com/userfiles_arla/files/xutidoluju.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3a5374fd2---20834251517.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/83216124387.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff7c42bea8---wopawakemeroxepi.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f1baf2f1451---sagutajofozesukofipadazi.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/zegin.pdfIn PDF document text
    • https://detector-billetes.com/Imagenes/file/64363208873.pdfIn PDF document text
    • https://www.pharmawell.eu/ckfinder/userfiles/files/dadodixafanozed.pdfIn PDF document text
    • http://rideco.hu/upload/file/35790811457.pdfIn PDF document text
    • http://stroi-sistema.ru/img/rasuwexevadaxusoza.pdfIn PDF document text
    • http://bocghebinhduong.com/media/ftp/file/xarolasizez.pdfIn PDF document text
    • http://hamkr.com/userData/board/file/7977513612.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/a00bb47230e1ada2d3a8633392ae1ca2/kozotebanazuderabi.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/rudekomop.pdfIn PDF document text
    • http://www.colormotion.cz/UserFiles/file/vebukulumegibusolikolatap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=dhule+map+pdfPDF 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_off0000b3ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3EA 15968 bytes
SHA-256: 010c6b26e394128b1a353c1b8d06325ecfc8d281294482a7a264bfc792dc6e85
font_01_sfnt_off0000dc92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC92 10184 bytes
SHA-256: a30797ab010f3a5e006b304cc610cb0212c4eaae1c84c046ac765666b7849d4d
font_02_sfnt_off0000f354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF354 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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