Malicious PDF — malware analysis report

Static analysis result for SHA-256 2864dad3f23cb2a6…

MALICIOUS

PDF

75.5 KB Created: 2021-09-13 13:11:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 2a206e4136def2b1b2d71115bb1a7ce1 SHA-1: 01e594730eff96efba89b80091d77895fbfe0d95 SHA-256: 2864dad3f23cb2a6b01df22f53f36c296c7d65b1d5c1348ab1639d2ac7a38e66
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The presence of numerous embedded URLs, many pointing to suspicious domains and linked to a 'link farm' heuristic, suggests a phishing or malware distribution attempt. The document body is heavily obfuscated, but the overall pattern indicates a lure to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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://www.ccengis.be/applications/ckeditor/addons/ckeditor/ckfinder/userfiles/files/livegutike.pdf In PDF document text
    • http://mcrlclient.gilcom.ro/ckfinder/userfiles/files/lujefadikel.pdfIn PDF document text
    • http://gelikonline.ru/content/Files/82760533279.pdfIn PDF document text
    • http://cottoneauto.it/userfiles/files/73136365321.pdfIn PDF document text
    • https://mt-creativestudio.com/ckfinder/userfiles/files/71331377924.pdfIn PDF document text
    • http://cka-shiba.com/ckfinder/userfiles/files/7188510311.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/80743534549.pdfIn PDF document text
    • http://lexprikson.com/admin/style/images/userfiles/file/82210572337.pdfIn PDF document text
    • https://rajaketiga.com/contents/files/96493043602.pdfIn PDF document text
    • http://full814.com/upload/files/fosomomamaxarax.pdfIn PDF document text
    • http://levant-tekstil.com/other_files/File/69246056768.pdfIn PDF document text
    • https://artcorner-fiberglass.com/userfiles/files/zugeda.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161368935195d4---vudatunomivoxaf.pdfIn PDF document text
    • https://alternativi.brtim.com/uploads/wysiwyg/files/81468080880.pdfIn PDF document text
    • http://dr-temt.ru/images/file/dusovum.pdfIn PDF document text
    • http://muzeumostrowiec.pl/obrazy/file/tewegedemitagalato.pdfIn PDF document text
    • http://aquitaine.annuaire-regional.com/ckfinder/userfiles/files/14287904935.pdfIn PDF document text
    • http://fioredda.com/userfiles/files/66555727151.pdfIn PDF document text
    • http://swapnakoodu.com/fck_uploads/file/vubepitadu.pdfIn PDF document text
    • https://valubil.com/public/uploads/cms_file/cms_files/41985642654.pdfIn PDF document text
    • http://alde-pace.org/ckfinder/userfiles/files/66417672865.pdfIn PDF document text
    • https://pmfegypt.com/userfiles/files/35495673048.pdfIn PDF document text
    • http://apvn.info/userfiles/file/84240391547.pdfIn PDF document text
    • https://gaziemirkentkonseyi.com/upload/files/reduzajuguritaje.pdfIn PDF document text
    • http://hennel.hu/sources/elemek/file/binetolasalagodekitogiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=call+of+duty+mobile+unlimited+money+apkPDF 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://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_off0000c69a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC69A 10868 bytes
SHA-256: aed3e444bdda434da97d0e44f5fc685d912a2c0b59dc0ae4441e9676bc0fc6ff
font_01_sfnt_off0000df87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF87 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF799 16884 bytes
SHA-256: 4b752cae58f9540a49b8b629cf2d37bc69fed74fa5c76d621e816bb669b178e2