Malicious PDF — malware analysis report

Static analysis result for SHA-256 54602e47b6d26406…

MALICIOUS

PDF

83.4 KB Created: 2021-09-19 06:01:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fb7807af3446ac198c6e73c5e16ce810 SHA-1: 6faf42f9a1143b3327d6b2e19741b95b370d5011 SHA-256: 54602e47b6d264063892b4f2ad733a8642c5424532d1cd09fdd76165bc00be62
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics identified it as a link farm with disposable hosting, and it contains numerous embedded URLs, one of which is associated with a potential phishing lure for 'camscanner full premium'. Although no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://luckdidea.com/ckfinder/images_store/files/61982678635.pdf In PDF document text
    • http://blesk-stroy.ru/userfiles/files/gumiguru.pdfIn PDF document text
    • https://alicantea.centralcms.cloud/galeria/files/70387987214.pdfIn PDF document text
    • http://thechitay.com/uploads/userfiles/file/viwabarikavosagiwidit.pdfIn PDF document text
    • https://aarhuskortet.dk/images/file/9554286212.pdfIn PDF document text
    • http://currycornersugarland.com/admin/images/file/50826962457.pdfIn PDF document text
    • https://abicecream.ru/ckfinder/userfiles/files/83412078826.pdfIn PDF document text
    • https://kapokcmassage.com/uploads/files/202109150111274882.pdfIn PDF document text
    • https://marbeyoyun.com/calisma2/files/uploads/kabujebomu.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613ad7c8521d8---javuxaxasudeguranuzopilu.pdfIn PDF document text
    • http://nscenter.cn/upload/files/dosigugukimidoraritevu.pdfIn PDF document text
    • http://edmo-cars.nl/images/file/pesusudug.pdfIn PDF document text
    • http://zensushidanapoint.com/uploads/files/96314715538.pdfIn PDF document text
    • https://merlak.ru/userfiles/file/14597519309.pdfIn PDF document text
    • http://jmyhship.com/uploadfile/files/90957293418.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/rozapejogovufupagifoge.pdfIn PDF document text
    • http://ukrfirework.com/images/file/5608205119.pdfIn PDF document text
    • http://architettogherardi.eu/userfiles/files/25504020707.pdfIn PDF document text
    • https://www.libyamonitor.com/sites/all/libraries/ckfinder/userfiles/files/livoko.pdfIn PDF document text
    • https://copyjokertw.aw6.tw/uploadfile/qu4_qu106_com/files/29125158459.pdfIn PDF document text
    • https://4wheelchile.cl/admin/uploads/file/14207125239.pdfIn PDF document text
    • http://nemdanangpho.com/uploads/2021-09-19/images/files/fejiful.pdfIn PDF document text
    • https://aiwcecckolkata.org/FCKeditor/file/fovojelelodotulivibug.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/ssg5f2dbvhfutaqre36gpri5qk/52411074218.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=camscanner+full+premiumPDF 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_off0000e25d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25D 17456 bytes
SHA-256: 53ec330741b3a4beb98b58dc1f7c9e72a90976ff62fdf486ee9e58aba84775a5
font_01_sfnt_off00010fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC8 10552 bytes
SHA-256: 6fc6dfe834b866fd9016c2554a0e589390f017bc6c5905ce4abbf1ef2eeb7dfc
font_02_sfnt_off000127bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1