Malicious PDF — malware analysis report

Static analysis result for SHA-256 947a1cbee8be08cc…

MALICIOUS

PDF

85.2 KB Created: 2021-07-07 21:56:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 333cb72211d164f1862d0d7ba8782d56 SHA-1: 0a7bbceaf45ed41fd0fcb86278a30beac7699ea6 SHA-256: 947a1cbee8be08ccc4edec05dbacf410505f279e3a6b76308424db43e16269d8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, indicating an attempt to execute malicious code. It also features numerous links pointing to compromised WordPress sites, suggesting a phishing or redirection scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to deliver a secondary payload or redirect users to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/gvhqpno9gtafhjhpb2ppjcb2fa/22326495161.pdf In PDF document text
    • http://pettwayfamilyreunion.com/clients/39389/File/61822487826.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/f3d4bd44cc10c6e128ec23da4d26921c/vudifonalafuro.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202105/file/66356612960.pdfIn PDF document text
    • http://technoauto.jp/js/upload/files/88777443484.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/04ad4d4ad1694afdcd0c364fc62ccd97/71486800943.pdfIn PDF document text
    • http://nhatngungoisaoxanh.com/upload/files/puvijimarojufujozix.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/ch5m4133h6si15g2ha2b80hsjf/54701706862.pdfIn PDF document text
    • http://aquatherm-graz.at/files/pazepujufujufubibaba.pdfIn PDF document text
    • http://akssert.com/userfiles/files/xagilokinuze.pdfIn PDF document text
    • https://tekdalyapi.com/upload/ckfinder/files/tisuvegomerogezojuxiwuk.pdfIn PDF document text
    • https://ewt.cz/res/file/67041512216.pdfIn PDF document text
    • https://chiuman-hk.com/images/file/lugiwutonuzoxe.pdfIn PDF document text
    • http://hanleyresources.com/images/82777616498.pdfIn PDF document text
    • http://camionespanamericana.com/userfiles/file/digulisum.pdfIn PDF document text
    • http://fxmeat.com/upload/file/b7b54f883265ff562545fbeb5feb91b8.pdfIn PDF document text
    • http://nitexprofi.cz/userfiles/file/voxawowawalodu.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/23b127fd3fa7160409ffd270b698b4ff/26077397242.pdfIn PDF document text
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/f06fc2733e795988241ba91d1101b2fd/61435516873.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/0974ca8abde5b0c7c38291010900d9bc/80617682496.pdfIn PDF document text
    • https://yar-net.ru/userfiles/file/84792343240.pdfIn PDF document text
    • https://ksuskalology.com/images/file/vawarubazelebapifubedej.pdfIn PDF document text
    • http://baovephuongtroi.com/vietkiendo/upload/file/9847632483.pdfIn PDF document text
    • https://cytairtool.com/test/userfiles/file/20210611_a94ca.pdfIn PDF document text
    • https://www.visitrwanda.com/wp-content/plugins/super-forms/uploads/php/files/eec4bd4bb7f32aabdcd561d43ea6fc9f/21859016347.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=cole+swindell+and+dierks+bentleyPDF 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_off0000e9a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A4 10704 bytes
SHA-256: f5d9c4cbefd7af6498fe0493383eec81c7166027c8bd33ae2e1e8959225f4043
font_01_sfnt_off0001026c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026C 17300 bytes
SHA-256: 8f986a91a7fe50d3c71c79a8e09fce846962f39757410b99a3f1f5230dd79ad4
font_02_sfnt_off00012f85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1