Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e50af779bb80c3f…

MALICIOUS

PDF

69.4 KB Created: 2021-09-29 00:20:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 72f72cb2fe355f106197c9bb25205f43 SHA-1: 86b50ffa1a0eba66ffd6f14fed26c7b0897fc505 SHA-256: 0e50af779bb80c3f0280663e18e3be445eac498678b2a6f648a4709b05c703b0
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and are structured as a link farm. The ML classifier strongly flagged this PDF as malicious, and the heuristic analysis indicates a high number of distinct hosts and links per host, suggesting an attempt to obscure malicious destinations. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 4

  • 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://laetitiabernard.fr/images/file/giwigonajen.pdf In PDF document text
    • http://vamaconsulting.sk/userfiles/file/kukituga.pdfIn PDF document text
    • http://liveisagenix.com/ckfinder/userfiles/files/57496370124.pdfIn PDF document text
    • http://abw10thstreetne.com/uploads/files/nofina.pdfIn PDF document text
    • http://eko-baby.ru/userfiles/file/lebipapagobijul.pdfIn PDF document text
    • http://monikaknoblochova.com/userfiles/file/gufobotosasijogigaruzo.pdfIn PDF document text
    • http://velapower.com/glwh/UploadFile/file/2021092217205573499.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/2a0673eab9f56590776c62945ff72760/96665706494.pdfIn PDF document text
    • http://valdhans.cz/userfiles/file/xavumolokure.pdfIn PDF document text
    • http://www-a.euro-ex.net/images/blog/file/46938492467.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/44378682774.pdfIn PDF document text
    • https://currenwatch.myhost360.cn/file/upload/files/09-12-19-15-45-99.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/dudos.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/ec7e07c7a32fa283941c2f9e94a869f7/63610776891.pdfIn PDF document text
    • http://yasairamenbar.com/uploads/files/gelija.pdfIn PDF document text
    • https://vannordenvastgoed.nl/userfiles/file/96950636044.pdfIn PDF document text
    • http://ever-pioneer.com/upload/files/87390126008.pdfIn PDF document text
    • http://hotelgiottotorino.com/userfiles/files/56976721202.pdfIn PDF document text
    • https://totszerdahelyikultura.hu/images/file/4315630153.pdfIn PDF document text
    • https://cet.sk/res/file/23390627615.pdfIn PDF document text
    • https://gosselindesign.com/images/from_fckeditor/fichiers/6696080746.pdfIn PDF document text
    • https://jck.ro/userfiles/file/zojezifezivedotexig.pdfIn PDF document text
    • http://geraldinekilkelly.ie/68986253274.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=ultimate+ninja+blazing+androidPDF link annotation
    • https://b2cdemo.tickets.com/content/files/22989426525.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_off0000afad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFAD 15988 bytes
SHA-256: f0a175bd151df3a1b3712d2a166c88da9e5d31c7df5861f7a10c11c000a6925f
font_01_sfnt_off0000d7c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C2 10760 bytes
SHA-256: da09ccef6ea856ab0bf7a91b5312f6b62a3669f106edd6dd93050098a4aa910c
font_02_sfnt_off0000f034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF034 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1