Malicious PDF — malware analysis report

Static analysis result for SHA-256 94fbdbc439fee8f7…

MALICIOUS

PDF

66.7 KB Created: 2021-09-13 08:09:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: d53f291aed021eaf6f25ac419e63105a SHA-1: 1653f4d30f2e7a49e78f44f21852f2e4fab0768c SHA-256: 94fbdbc439fee8f7c05b363bb3ccd1a6120380aa43c9babbb804a56eb104f15d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to potentially malicious domains, identified by heuristics as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://irlanc.ru/uplcv?utm_term=d%26d+4e+character+sheet+pdf PDF link annotation
    • http://baigeleather.com/userfiles/file/36356147989.pdfIn PDF document text
    • https://pastravariaizvoarelebratiei.ro/images/file/47198796664.pdfIn PDF document text
    • https://searchlink.org/userfiles/file/19158844663.pdfIn PDF document text
    • http://minhanh.com/files/bozetifinebapow.pdfIn PDF document text
    • http://ceskylakros.cz/userfiles/file/jasapizigolesozafibom.pdfIn PDF document text
    • https://madspot.dk/ckfinder/userfiles/files/bimoketudajovalasida.pdfIn PDF document text
    • http://kliknetezde.cz/admin/obrazky/file/23046285578.pdfIn PDF document text
    • http://hotel-ambassador-nice.com/upload/files/wazozurafasuvefar.pdfIn PDF document text
    • https://saintarseny.ca/sites/saintarseny.ca/files/file/24267962731.pdfIn PDF document text
    • http://wangguanhardware.com/userfiles/file/vuturez.pdfIn PDF document text
    • http://eska-lift.ru/userfiles/file/40191749145.pdfIn PDF document text
    • https://castel.ro/userfiles/file/rexogozomemo.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613459aa86336---35671091784.pdfIn PDF document text
    • https://rockyhotelsgroup.com/uploaded/files/mowifegezemajuw.pdfIn PDF document text
    • http://studiofranzoni.eu/userfiles/files/85494886581.pdfIn PDF document text
    • http://sanarina-coaching.de/ckfinder/userfiles/files/9945439760.pdfIn PDF document text
    • http://gjbbang.com/userData/board/file/15718036508.pdfIn PDF document text
    • https://xn--z4qq44i.xn--kpry57d/upload/actfiles/40826033211.pdfIn PDF document text
    • https://www.speeddating.lt/speeddating/ckfinder/userfiles/files/lotafigomos.pdfIn PDF document text
    • http://bojovesporty.cz/userfiles/file/47853776241.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_off0000aeb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEB5 14600 bytes
SHA-256: dfc2e164a68eb526449c6474a70c8bcb72e74c8053e26e51562c4c53f1d18c09
font_01_sfnt_off0000d2eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2EB 9076 bytes
SHA-256: f695977626623e59fedb2fbedebd468d0acf89ff6f6ceafeb3cee4351ddee6c8
font_02_sfnt_off0000e590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE590 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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