Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d6584cb59c531db…

MALICIOUS

PDF

83.0 KB Created: 2021-09-18 05:59:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8a1651d548f416cb07b2e89d15c5da5c SHA-1: f106f16ec74df606ca11e4eba9184631555c8802 SHA-256: 0d6584cb59c531db35b7227c58f8a610860143c6475d7aaeb6eca091ead8b1de
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to various PDF files hosted on different domains, indicative of a link farm or spam distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://basisangka.com/contents/files/43287000981.pdf In PDF document text
    • https://inprovitmexico.com/ckfinder/userfiles/files/62939722165.pdfIn PDF document text
    • http://secretinvitation.net/images/files/86715844124.pdfIn PDF document text
    • http://abwingscolley.com/uploads/files/54633300211.pdfIn PDF document text
    • http://vimbark.sk/editor_uploads/files/5268615073.pdfIn PDF document text
    • https://smlstripedbass.com/home/rock/public_html/ckfinder/userfiles/files/tuxovubigekozugu.pdfIn PDF document text
    • https://pincodehub.in/userfiles/file/wezabumekudut.pdfIn PDF document text
    • http://carlaschroyen.com/content_docs/runagezodilif.pdfIn PDF document text
    • http://location-appartement-venise.com/italie_documents/files/68174023670.pdfIn PDF document text
    • http://hasicimosnov.cz/foto/Image/file/gamapapetafiwanerutero.pdfIn PDF document text
    • https://branchennachweis.eu/userfiles/file/8916242257.pdfIn PDF document text
    • http://intelekt.biz/uploads/pages/files/bediwev.pdfIn PDF document text
    • http://gewoongroen.eu/app/webroot/files/userfiles/files/93693323338.pdfIn PDF document text
    • http://school15-tyumen.ru/f/tuwelifokamenexuturu.pdfIn PDF document text
    • http://actlogistic.vn/upload/editor/files/xelovaboximexaboradupug.pdfIn PDF document text
    • https://spvi.cn/filespath/files/20210913232609.pdfIn PDF document text
    • http://katachizu.com/img/news/files/75645042696.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135adfbed2b7---25100627110.pdfIn PDF document text
    • http://sevimticaret.net/userfiles/file/wupaluz.pdfIn PDF document text
    • https://himarco.ir/basefile/himarcoir/files/7891747377.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=best+otome+games+on+androidPDF 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_off0000df77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF77 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF789 18232 bytes
SHA-256: d7915a870abcaa4bf84f67874c9219e3e52a2389cc96a41c2ee519ff0f6ca9d0
font_02_sfnt_off000126d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126D3 10600 bytes
SHA-256: a920a4d1d9ac089f72e02e0920b45fa9224c7eac820755a13943d3186fb8aa16

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