Malicious PDF — malware analysis report

Static analysis result for SHA-256 296392c7297b98ed…

MALICIOUS

PDF

82.6 KB Created: 2021-09-17 09:13:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 413dc370a0fbea4e3d284b886df29e39 SHA-1: 54ef0bfea5f2959401f5ebe8f74798ed278a39bb SHA-256: 296392c7297b98ed8e95aa5e7eb81a0483ba981921eea8a1bd63c4bcde4e44ef
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a heuristic firing for a 'download button' lure, indicating an attempt to trick users into downloading further malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of many external links on disposable hosting suggests a link farm designed for malware distribution or phishing. No scripts were extracted, but the overall structure points to a downloader or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • 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://garglob.ru/uplcv?utm_term=tutuapp+vip+apk+android PDF link annotation
    • https://ginecologmuresan.ro/ckfinder/userfiles/files/30871194428.pdfIn PDF document text
    • http://aptekarynek.pl/zdjecia/fck/file/89887708709.pdfIn PDF document text
    • http://toanthinh.vn/webroot/img/files/11957489987.pdfIn PDF document text
    • http://popmetre.com/news/files/vosebopu.pdfIn PDF document text
    • http://lerucherdesanges.fr/userfiles/file/puviwigotuwidu.pdfIn PDF document text
    • https://elsadaulte.com/ckfinder/userfiles/files/sojij.pdfIn PDF document text
    • https://usssecuritate.ro/userfiles/file/42189173946.pdfIn PDF document text
    • http://namhungholdings.com/uploads/ckfinder/files/zelosomipuvadaka.pdfIn PDF document text
    • https://neksav.com/upload/ckfinder/files/77024299102.pdfIn PDF document text
    • http://af.ssla.ru/images/fornews/files/18003724392.pdfIn PDF document text
    • https://tasteadmin.com/ckfinder/core/connector/php/custom/wysi_uploads/files/falabodifub.pdfIn PDF document text
    • https://whatshoulditcostme.com/userfiles/file/2220142212.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/baleforurekamenubum.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/0ca2a551efafe18eb4a79be7c22a9533/30865613163.pdfIn PDF document text
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/kowedobobovixubiwafoxati.pdfIn PDF document text
    • http://jayeonrak.com/upfile_editor/2021/files/zekopu.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/161382c5658fb1---49133774859.pdfIn PDF document text
    • https://gaadalagi.com/contents/files/48581456481.pdfIn PDF document text
    • https://tedesco.pl/userfiles/file/fivinudanepogazival.pdfIn PDF document text
    • https://rh-h1tapi-turbo.com/contents/files/54303925332.pdfIn PDF document text
    • http://rungrawin-itt.com/userfiles/files/relazivume.pdfIn PDF document text
    • http://inica.org/files/file///16736967819.pdfIn PDF document text
    • 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_off0000de25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE25 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF637 18320 bytes
SHA-256: 8e0d531d2c93add882439013c309b6fef7741845006d726eaf0a05e2705348e2
font_02_sfnt_off000125ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125ED 10260 bytes
SHA-256: 917b63bb5801bae166b784163cd3af6b3e49ea63e11dc3f7349fd3498c096c20

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