Malicious PDF — malware analysis report

Static analysis result for SHA-256 32d32ca627e78179…

MALICIOUS

PDF

104.2 KB Created: 2021-09-20 11:08:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 678894b014c6396845209bfa119d9f38 SHA-1: 403536339e6a416494d4a0e6df1451e001097555 SHA-256: 32d32ca627e78179a613e26f587d628603c3097ddedbf694b4ca168696035884
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flagging it as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The presence of many unknown reputation URLs further supports this, as they likely serve as destinations for the lured users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gocep.org/data/userfiles/files/xedovenaxale.pdf In PDF document text
    • http://tnmetalworks.com/images/files/20417913.pdfIn PDF document text
    • http://mskgroup-spb.ru/upload/file/47492868931.pdfIn PDF document text
    • https://free-spirit-city.eu/uploads/wysiwyg/files/pezevuzovuro.pdfIn PDF document text
    • https://triyoga-tv.ru/userfiles/file/46014241902.pdfIn PDF document text
    • https://www.hinkler.com.au/application/third_party/ckfinder/userfiles/files/fovurifidimunidomeguned.pdfIn PDF document text
    • https://medsplus.us/admin/images/file/46409698499.pdfIn PDF document text
    • http://fosterfreezesantarosa.com/uploads/files/40702671692.pdfIn PDF document text
    • http://dalhousieretreat.com/cote_dor_import/admin/ckfinder/userfiles/files/tutote.pdfIn PDF document text
    • http://a-b-i-s.net/layout/bilder/file/66927127455.pdfIn PDF document text
    • https://cambodiaangkorhomestay.com/userfiles/file/murimilafomopujinidume.pdfIn PDF document text
    • http://ssteelelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vimovelatavalitide.pdfIn PDF document text
    • https://suacuachuyennghiep.com/uploads/files/10583306573.pdfIn PDF document text
    • https://hklh.vip/data/attachment/file/pipepadatafitubagilazu.pdfIn PDF document text
    • http://evergladesharvesting.com/ckfinder/userfiles/files/bisaderaxanagase.pdfIn PDF document text
    • https://fotoprint.lv/downloads/file/saguleguzifelizekafemo.pdfIn PDF document text
    • https://cingenito.ca/upload/editor/file/vuwitip.pdfIn PDF document text
    • https://daiichitravel.com/uploads/news_file/kuledik.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/161376e376dbf5---tawiratujugenojupuvesoj.pdfIn PDF document text
    • http://ccspatti.org/userfiles/file/55101776534.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/161433fe64419b---najopitar.pdfIn PDF document text
    • http://frigotechreina.com/userfiles/files/39975074890.pdfIn PDF document text
    • http://www.ccengis.be/applications/ckeditor/addons/ckeditor/ckfinder/userfiles/files/solirofod.pdfIn PDF document text
    • http://qualityspices.in/ckuploads/files/jojizasivetuloxixenugo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=lady+chatterley+pdf+deutschPDF 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_off00012d68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D68 10572 bytes
SHA-256: 52aa4d0ca2228655ff13562374204471919878481e54bbaeb2d1897f2511a70d
font_01_sfnt_off000145b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145B0 20704 bytes
SHA-256: 7b26666307dd88dc105ea495468f3b363893af6949b90333fdf84d885e662044
font_02_sfnt_off00017b48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1