Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5daa3b793afaa60…

MALICIOUS

PDF

69.2 KB Created: 2021-09-18 07:02:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c5257a59c4402e16c7bff98f5e533ec0 SHA-1: 108038cd5152bae29f404ce266620c2ee7ddbce0 SHA-256: e5daa3b793afaa60a70a16ae08c950bbf9cc50d79a07dac625a5bb8d9c0551a7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by multiple heuristics, including ML and ClamAV, and contains numerous external URLs. The PDF structure and embedded URIs suggest it's a link farm intended to redirect users to potentially malicious sites. While no scripts were explicitly extracted, the presence of many external links and the 'ML_NYX_PDF_MALICIOUS' heuristic indicate a high likelihood of it being used for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://garglob.ru/uplcv?utm_term=ae+3d+motor PDF link annotation
    • http://preiss.at/upload_files/files/terurozobivoje.pdfIn PDF document text
    • http://mutamobilya.com/images_upload/files/rusavigu.pdfIn PDF document text
    • http://dagmar-e.de/userfiles/file/kufosekabuwodujojapoporeb.pdfIn PDF document text
    • http://baraanduliaptti.org/userfiles/file/37571718157.pdfIn PDF document text
    • http://gidaero.com/upload/fckeditor/file/girogomotivoguwad.pdfIn PDF document text
    • https://doucetplasticsurgery.com/ckfinder/userfiles/files/28104066402.pdfIn PDF document text
    • https://ocw.tw/uploads/files/36776168031.pdfIn PDF document text
    • http://agro-vostok.ru/userfiles/file/70404864590.pdfIn PDF document text
    • http://maremio.ru/admin/ckfinder/userfiles/files/79697601730.pdfIn PDF document text
    • http://shepardinteriordesign.com/rw/upload/file/27698714453.pdfIn PDF document text
    • http://gfb.it/upload/fck/file/josopotu.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f57c876494---julabazozubus.pdfIn PDF document text
    • http://geodavidepini.it/userfiles/files/55188483897.pdfIn PDF document text
    • http://free-note.kr/files/fckeditor/file/2089647578613867007caaf.pdfIn PDF document text
    • http://change4best.ru/upload/file/tajebizukamasobux.pdfIn PDF document text
    • http://japan-railpass.info/images/blog/file/xosofoxenizax.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/d6033649356f46ce69382e1f43005bb5/babisemaruluwazuwobalaba.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/monizorez.pdfIn PDF document text
    • https://expomediainc.com/upload/file/59348290052.pdfIn PDF document text
    • http://ttc-investco.com/img/files/savep.pdfIn PDF document text
    • https://tagoproperties.com/ckfinder/userfiles/files/5040254110.pdfIn PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/dupegetezoborumopomuju.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_off0000af0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF0A 16468 bytes
SHA-256: 00ed3924baf7f2daba44f104f3132e31d7942748c8c4396306dcdc2d03fc4526
font_01_sfnt_off0000d9b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f1ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CE 9992 bytes
SHA-256: bd5d0bb4d423d22060c5ba44283ec24544ff204ae7304f44da9fb721c2903986

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