Malicious PDF — malware analysis report

Static analysis result for SHA-256 26ed60094794ba12…

MALICIOUS

PDF

78.5 KB Created: 2021-09-11 13:30:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: 13b15faec4533bafb3f0a5b412232c24 SHA-1: 7b90526ea567d1906e58ce180e0942b64c581321 SHA-256: 26ed60094794ba12a1e5c386c2993cb9e8999abd2f4f43518bffe3c0d431da4d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • 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://inwebjor.ru/uplcv?utm_term=epub+to+pdf+free+online+conversion PDF link annotation
    • http://gidromall.ru/img/uploads/file/buzodikilazogaxapikipen.pdfIn PDF document text
    • https://tspinstruments.com/cache/fck_files/file/86159116339.pdfIn PDF document text
    • http://allier-genealogie.org/File:/56478182540.pdfIn PDF document text
    • http://archiwum.wyryki.eu/admin/ckfinder/userfiles/files/xikipi.pdfIn PDF document text
    • http://iwilldoit.ru/uploads/files/files/zorisuroxi.pdfIn PDF document text
    • http://coral-travel66.ru/admin/ckfinder/userfiles/files/1656500345.pdfIn PDF document text
    • http://polipack.ru/content/file/debikuvowepejubovike.pdfIn PDF document text
    • https://congtydaihai.com/upload/files/lovifikigegosedamep.pdfIn PDF document text
    • https://www.sensormaticltd.com/app/templates/js/ckfinder/userfiles/files/26457322338.pdfIn PDF document text
    • http://epwuae.com/userfiles/file/girisu.pdfIn PDF document text
    • https://www.libyamonitor.com/sites/all/libraries/ckfinder/userfiles/files/24911847410.pdfIn PDF document text
    • http://zdravi-kromeriz.cz/files/file/43186200968.pdfIn PDF document text
    • http://seattledesis.com/fckeditor/file/21457954144.pdfIn PDF document text
    • https://tasivn.com/upload/ck/files/6099087672.pdfIn PDF document text
    • http://montoaneli.com/ckfinder/files/kekebafawepibikulakuv.pdfIn PDF document text
    • http://orthodoxvaidikasanghom.org/userfiles/file/lotumililumekije.pdfIn PDF document text
    • http://abwjefferson.com/uploads/files/30214041171.pdfIn PDF document text
    • http://infinity-pro.ru/userfiles/file/69088241239.pdfIn PDF document text
    • https://activepymes.com/pub/file/12585187634.pdfIn PDF document text
    • https://nergizleryapi.com/image/files/99531021755.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_off0000cd25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD25 18152 bytes
SHA-256: 5fa9ca7d35526064662ea2714d2629276f65a7ef85716a6cc9cc5a476a86b1fb
font_01_sfnt_off0000fc3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3A 10740 bytes
SHA-256: d441561cb4eb3767fe6766a916af97f1131efe03f4addd91886bc7277c64e77f
font_02_sfnt_off000114cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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