Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceb19917f5682923…

MALICIOUS

PDF

79.3 KB Created: 2021-09-22 14:49:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7c37851d4047a96d17156cacf45d056d SHA-1: 5cf1e884e74ce8291f00d7da353e90db8ad88b15 SHA-256: ceb19917f568292317783734f02c032875ff490677a249c65280cc31b041fcdf
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm with numerous external URIs, many hosted on disposable domains. While no scripts were explicitly extracted, the PDF structure and external links suggest an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://mwcapital.net/ckfinder/userfiles/files/luvivitadasaxirojif.pdf In PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/38590725822.pdfIn PDF document text
    • http://tugrabilgisayar.net/resimler/files/wovimamulexo.pdfIn PDF document text
    • https://monyetmesum.com/contents/files/31797988531.pdfIn PDF document text
    • http://cnsgafgl.netsociality.com/upload/files/45983389219.pdfIn PDF document text
    • https://obermeyer-modemarkt.de/upload/file/75517540057.pdfIn PDF document text
    • http://carbontuning.ru/file/xonisapilixerelumufunibuk.pdfIn PDF document text
    • http://blekinge.boj.se/uploads/userfiles/files/99446013638.pdfIn PDF document text
    • http://ryouhurt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gabomezupo.pdfIn PDF document text
    • http://fjsxsx558.com/upload/files/tupemeroza.pdfIn PDF document text
    • http://muntepa.com/userfiles/files/34800480593.pdfIn PDF document text
    • http://www.rannatennis.ee/data/upfiles/files/fodabukuzibo.pdfIn PDF document text
    • http://hftyby.com/upload_fck/file/2021-9-8/20210908152302171797.pdfIn PDF document text
    • http://www.azurwelcomeservices.com/userfiles/file/89333194126.pdfIn PDF document text
    • https://alquimia.in/admin/fckeditor/editorfile/dovinuvar.pdfIn PDF document text
    • http://emekyesiltepe.net/images_upload/files/zegixibesukiruluw.pdfIn PDF document text
    • http://holidayinntorino.com/userfiles/files/9797537070.pdfIn PDF document text
    • http://hoteldarim.ir/basefile/hoteldarimir/files/94769885720.pdfIn PDF document text
    • http://posicert.com/upload_fck/file/2021-9-12/20210912174945605942.pdfIn PDF document text
    • https://quanticabtl.com/cms_2018_quantica/sgi_userfiles/userfiles/files/65487805080.pdfIn PDF document text
    • https://alate.org/admin/fckeditor/editorfile/56711081689.pdfIn PDF document text
    • http://thesprotia.gr/uploads/file/gewajebufelugak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=keyword+researcher+proPDF 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_off0000d38c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD38C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA3 10464 bytes
SHA-256: ee4d706fd06b2ea8fd87a2eacaf18dd3ac9d4d215394f505815acd698754c38c
font_02_sfnt_off00010394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10394 16960 bytes
SHA-256: d26b819181e488d669f21a442349882ebd16229054fe654c98436c7a1f4b72fe

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