Malicious PDF — malware analysis report

Static analysis result for SHA-256 f046086a3ecd162a…

MALICIOUS

PDF

86.1 KB Created: 2021-07-30 14:56:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 1ca81ca674099ceadaeaecc51d2eb2dd SHA-1: 726cb65e79597f6fc0ddae7129c8e5beb4d861d4 SHA-256: f046086a3ecd162a82a6fc1b2b179ad4b83f1177f398edb6442403bc3ca28158
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/36523533c79951398386aa6d1347e2cf/17600909997.pdf In PDF document text
    • http://zhengfutz.com/v15/Upload/file/20215242149359690.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080e98f64b30---34982335512.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/58261327430.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8be1fea3e4---sekusi.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/81ec65d3fb49382d56daa8dabf3d0792/25479830305.pdfIn PDF document text
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/9f3d57588d20b6ba98706d7fd562fc56/55589145956.pdfIn PDF document text
    • http://thetuckerfamilyreunion.com/clients/67950/File/ragowojedezegukinig.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/1dcb15ae6ff5d596ba3b05734f37b27e/xekalafugeweve.pdfIn PDF document text
    • http://asianaccounting.com/admin/fckeditor/userfiles/file/82715896757.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/9cd4157f78ee5cb164ccf0b316e58f51/jijopeduzetivitoxonuvu.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160fadee599cc2---vajobinuvixekizovomunavi.pdfIn PDF document text
    • https://autoprofi.ua/userfiles/file/riribol.pdfIn PDF document text
    • http://trans-serwis.com/userfiles/file/rowubinomaxuwapubi.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d5f4dce24e8---11412814417.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160bffcb11b0a3---kasezikadusijutod.pdfIn PDF document text
    • https://avenue102.com/uploads/file/saxebalasopimesudinij.pdfIn PDF document text
    • https://irantruck.ir/data/file/ruwigopavafobijifed.pdfIn PDF document text
    • http://kingsfinancialconsulting.com/userfiles/file/41829744597.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad2aef56d0b---50118147687.pdfIn PDF document text
    • http://high-keenltd.com/userfiles/file/deside.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cb5234d9616---2409733438.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16081214d7a80d---48054003225.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d077b628200---vepatisumopofomolotep.pdfIn PDF document text
    • https://bestofbucerias.com/upload/file/38755135429.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=2019+polaris+ranger+towing+capacityPDF 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_off0000e9ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BA 16816 bytes
SHA-256: bc220e143bc7164fb50f0577d94ab3111211b82de94bb9d2c547f95cb885f4dd
font_01_sfnt_off00011580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11580 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012d97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D97 11116 bytes
SHA-256: 0159fabbc092744def1fddc8a3854cbb1a1d06747b96a10130ee7cc321d98e6c