Malicious PDF — malware analysis report

Static analysis result for SHA-256 96fb7a0a06a80547…

MALICIOUS

PDF

92.4 KB Created: 2021-09-19 17:35:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c01b31b4451241de648089c7ce42c788 SHA-1: a3bdf6d24859692f98dbafd96df59d30b4d50210 SHA-256: 96fb7a0a06a805473f8cbf11851fb121d145c12386861946e79c720143e166a3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to external PDF files, suggesting a link farm or redirection mechanism. The PDF structure and embedded content, though heavily obfuscated, are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9897

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://hockjoohin.com/admin/uploads/file/dofokowazorupowomu.pdf In PDF document text
    • http://meuseguro.top/fotosempresa/files/45024024833.pdfIn PDF document text
    • https://lrsinc.co/userfiles/file/nuvubabemizaviwiruwi.pdfIn PDF document text
    • http://cen7dias.es/userfiles/files/lexovepatadosoti.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613819ed66559---65140676553.pdfIn PDF document text
    • http://molenat-energies.fr/molenat.com/images/editor/file/kufeworutusedukabagesijiv.pdfIn PDF document text
    • http://tylincms.com/userfiles/files/vutudikiwikexazu.pdfIn PDF document text
    • https://xn--80aesyq.xn--p1ai/files/file/wiropoxuxod.pdfIn PDF document text
    • https://3rproject.eu/ckfinder/userfiles/files/29598787142.pdfIn PDF document text
    • https://webmedcentralplus.com/userfiles/file/tegimojuwutiranubipoke.pdfIn PDF document text
    • http://szyqjsj.com/UploadFile/file/20210917210539064.pdfIn PDF document text
    • https://lexconsulting.ro/webroot/files/media/57454397992.pdfIn PDF document text
    • http://hbtsap.com/Upfiles/news/file///munituwaganezejo.pdfIn PDF document text
    • http://www.moyekolodin.com/files/gozinarufeziketi.pdfIn PDF document text
    • https://cristalparkhotel.com.ve/ckfinder/userfiles/files/58344687649.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/36648348544.pdfIn PDF document text
    • https://moulindelarroque.com/userfiles/file/pasuxadodu.pdfIn PDF document text
    • http://rungruangsteel.com/public/upload/userfiles/files/sibijituzivopopu.pdfIn PDF document text
    • http://home-plast.ru/foto/files/makukunefizam.pdfIn PDF document text
    • https://posaonakosovu.com/ckfinder/userfiles/files/lofatelataxofagomivonase.pdfIn PDF document text
    • https://davnosti.ru/upload/83639864429.pdfIn PDF document text
    • https://projetovm.com/uploads/files/38024462324.pdfIn PDF document text
    • https://prestinireedcorp.com/userfiles/files/25369980242.pdfIn PDF document text
    • http://nanoservice.cz/upload/file/37239633246.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/b4ea4e2472c22f311372040377deafb3/riputikivipodesuxemewugo.pdfIn PDF document text
    • http://hz-kontejnery.cz/ckfinder/userfiles/files/zuwerisoromudinimeruw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=lean+startup+book+pdfPDF 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_off0001052d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1052D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011d44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D44 10644 bytes
SHA-256: 2ba4c8ae3213539308385c1925bc3b35c337d82ed7bd11e923760efac36484ed
font_02_sfnt_off00013588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13588 18020 bytes
SHA-256: 0dd76c3864811af3cf4d35ee46f531b6de8d89a2501a29dc5235fcfbc317c16d