Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7eadba3b552bac2…

MALICIOUS

PDF

82.0 KB Created: 2021-09-12 10:58:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0656d3b9dc2d01052c03ba5d7e8126b5 SHA-1: de4aafdd76b4be3e646909677875711522d848bb SHA-256: f7eadba3b552bac259ebf100c49fd1e8855b9647fa6ca46e3413bd4d00cc5a58
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://silky.ae/images/bulk_images/files/mebejevika.pdf In PDF document text
    • https://gopherscopes.com/userfiles/file/ginitusimuxikula.pdfIn PDF document text
    • http://nakajima-ya.com/upload/save_image/files/zirebubevesixo.pdfIn PDF document text
    • http://kreativitaet-stadlhofer.at/global/images/userfiles/file/ronewetejatibimam.pdfIn PDF document text
    • http://cosonhuath.com/hinhanh_fckeditor/file/65080406581.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/13025241836.pdfIn PDF document text
    • https://manenshop.com/upload/files/29002851497.pdfIn PDF document text
    • http://titusauto.hu/kepek/file/28979779726.pdfIn PDF document text
    • http://france-ex.com/images/blog/file/nopekixobagovamoma.pdfIn PDF document text
    • http://optometrystaprzemysl.pl/userfiles/file/21799810964.pdfIn PDF document text
    • http://domplus.su/userfiles/files/46202301912.pdfIn PDF document text
    • http://st-johnson.com/Uploadfiles/files/nozexosomepav.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/zogex.pdfIn PDF document text
    • https://parfumzone.ro/files/file/42387827065.pdfIn PDF document text
    • http://ekhoron21.mn/uploads/files/zujogovutekapijuxufili.pdfIn PDF document text
    • https://www.hmgfinance.com/ckfinder/userfiles/files/purudab.pdfIn PDF document text
    • http://fongyoskert.hu/userfiles/files/tavuv.pdfIn PDF document text
    • https://senarathgroup.lk/assets/media/file/leborinunijaregimedelojo.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f848b66ee0---12442336089.pdfIn PDF document text
    • http://fuku-zou.com/userfiles/file/xemunugitelilasedituvi.pdfIn PDF document text
    • https://ubk-sad.de/azubi/userfiles/files/2894099988.pdfIn PDF document text
    • https://residenciasanamaro.es/userfiles/files/58303972871.pdfIn PDF document text
    • http://airsoft1.ro/files/file/jitukarimaduwidulaziwax.pdfIn PDF document text
    • https://sharkovinkom.com/sharkovinkom.com/ckfinder/userfiles/files/20328542335.pdfIn PDF document text
    • http://szakkepzosiklos.hu/upload/file/lofafi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=play+store+descargar+gratis+para+celularPDF 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_off0000da4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA4D 17908 bytes
SHA-256: 45643373ad4a2eec575b780388535a2621cc91d60ed598dd77aae9d069a0541a
font_01_sfnt_off00010926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10926 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001213d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1213D 10800 bytes
SHA-256: b220722baf3e636b14d4e0d3df19150b15d5d4161ebf59b42c6c16198470bfaf

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