Malicious PDF — malware analysis report

Static analysis result for SHA-256 014dabac1ec465d5…

MALICIOUS

PDF

81.0 KB Created: 2021-09-23 01:01:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 062a2c99ca1ea7716731c4919e7dd1be SHA-1: 5e531b38a52ddf8619dafcf76263bf1717989469 SHA-256: 014dabac1ec465d5e3d7990f59292855672fcbb2bf8961a762d17f0556b20585
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the PDF structure and link farm heuristics suggest it's designed to facilitate the download of further malicious payloads, likely through a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pristineleather.com/userfiles/file/xamesizoneruwebe.pdf In PDF document text
    • http://dd-eng.com/files/files/17778312873.pdfIn PDF document text
    • http://licausi.it/userfiles/files/vozuvaxikobivajuwum.pdfIn PDF document text
    • http://dongamold.com/fckeditor/upload_files/file/73228126688.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/kukogakotipuras.pdfIn PDF document text
    • http://jongauger.com/ckfinder/userfiles/files/dojopatejides.pdfIn PDF document text
    • http://mecateengenharia.com.br/ckfinder/userfiles/files/rupetat.pdfIn PDF document text
    • https://www.lire-les-notes.com/ckfinder/userfiles/files/padudosotef.pdfIn PDF document text
    • https://santchavarabed.in/ckfinder/userfiles/files/durerexudakekoledeko.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/84836d124d69606113e111d1aaafa228/kexuwubero.pdfIn PDF document text
    • http://neonatal-surgery.ru/userfiles/files/3748851096.pdfIn PDF document text
    • http://yjccnc.com/upload/files/gikexinobedowawalalexevo.pdfIn PDF document text
    • http://flooroverstock.com/admin/userfiles/file/solibagotukobolebofoxur.pdfIn PDF document text
    • https://akilanews.com/ckfinder/userfiles/files/44335619445.pdfIn PDF document text
    • http://gancza.pl/userfiles/file/bajumovafabubolesi.pdfIn PDF document text
    • http://creptiles.dk/userfiles/file/nivilogalokizejewitipir.pdfIn PDF document text
    • http://hrzservices.com/uploadfiles/file/lefawirexud.pdfIn PDF document text
    • http://csc-0411.com/userfiles/file/20210914073736_eke1jb.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143a237def91---7610292402.pdfIn PDF document text
    • http://www.atsamuihaus.com/image/upload/File/vakanitamazofonuvo.pdfIn PDF document text
    • http://yidaig.com/uploadfile/file/20210907162436.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135f8cc1a5a9---3633832059.pdfIn PDF document text
    • http://blackhorsesc.pl/userfiles/file/97753559666.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=cook+up+a+storm+movie+download+in+tamilPDF 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_off0000d885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD885 10928 bytes
SHA-256: 42a70cf65ba6d479502a0682f8721f5bb57044c0a3a5afb370a39602e4fcf630
font_01_sfnt_off0000f1eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EB 17172 bytes
SHA-256: 63392434e9c29f4bdd93f7ac8285aa835b533d1831e44e6fb104d1c3b3e63e56
font_02_sfnt_off00011e71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E71 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1