Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2474a7b611560ad…

MALICIOUS

PDF

85.6 KB Created: 2021-09-16 14:23:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 332ba88440029ef9284c3f9842c005de SHA-1: 5d9cbb52eb3072e49c66cb365938b6e3d389366b SHA-256: d2474a7b611560adfbebfac8f0669ed102fd678c34ba031b6b3bec53dd684d2d
126 Risk Score

Malware Insights

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

The sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to various domains, many of which appear to be part of a link farm designed to obscure the ultimate destination. The PDF structure and the presence of external URIs suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://appli-veolia.net/ckfinder/userfiles/files/56907112633.pdf In PDF document text
    • http://vagtteam.dk/userfiles/Files/nonitu.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613f5bb0606f6---tokudarenegikalel.pdfIn PDF document text
    • http://tolltisztitas.eu/userfiles/files/niwuvowixovulasujimimo.pdfIn PDF document text
    • http://oresteruggiero.com/userfiles/files/44315703131.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/82155845919.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/segidofo.pdfIn PDF document text
    • http://korea-labels.com/ckfinder/userfiles/files/numowolasojaparezofabug.pdfIn PDF document text
    • http://nhactheducthammy.com/upload/files/vadezamaw.pdfIn PDF document text
    • http://sz-nuoyi.com/Upload/file/2021090901542665929.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/52769297259.pdfIn PDF document text
    • http://ugrctrani.it/userfiles/files/fifusupurixejekokutizoji.pdfIn PDF document text
    • https://curewelldiabetes.com/userfiles/file/fuwarupapuritotat.pdfIn PDF document text
    • http://www.johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/jutujajitizidufibojewemim.pdfIn PDF document text
    • http://nhadephoanhao.vn/upload/ckupload/files/pigetoronavurajovamezaxi.pdfIn PDF document text
    • http://hidropro.hu/upload/24774229315.pdfIn PDF document text
    • https://przyklejki.pl/userfiles/vizililaradu.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/v3qua3dj8d9d0llc6r9v1jf1ob/kesoxo.pdfIn PDF document text
    • https://misbahelmudii.org/ckfinder/userfiles/files/rajurevolavozovokakosak.pdfIn PDF document text
    • https://campermagazine.tv/public/file/bapoja.pdfIn PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/pekexekifus.pdfIn PDF document text
    • https://maintogelonline.info/contents/files/rawazorope.pdfIn PDF document text
    • http://chi-kara.net/Upload/files/82124965800.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=ff+gun+skin+hack+appPDF 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_off0000e9ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EF 18168 bytes
SHA-256: 8e93a1c3cbdcc4afe11361c2754d605d75251bf5d44d976c51e84669eee73709
font_01_sfnt_off000118f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F4 10432 bytes
SHA-256: e207910e6bac6c24857d3cc0404763dd4630a4cdb933490fc6684a75ea888579
font_02_sfnt_off00013081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13081 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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