Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7faf0a218e1e765…

MALICIOUS

PDF

79.6 KB Created: 2021-09-19 01:58:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1804c76842cddf552285881e4f66c402 SHA-1: 2e092e934d04c178d522fa451714b740c2174d7b SHA-256: b7faf0a218e1e765e5d8b5e22a437b187e6117e8bbae93c65e491bdce5134dcf
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The presence of embedded JavaScript and a high number of external URIs, coupled with a critical ClamAV detection for 'Pdf.Phishing.Trojan', strongly indicates malicious intent. The ML classifier also flagged this PDF with high confidence. The document likely attempts to redirect users to malicious sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/tmp/30481407990.pdf In PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/161347918a3071---fepuduwawoxejoririguvi.pdfIn PDF document text
    • http://gartenstadt-apotheke.com/userfiles/file/75209320009.pdfIn PDF document text
    • http://avatars.ru/userfiles/file/kofobemerakenumozobifa.pdfIn PDF document text
    • https://www.ftha.org/admin/ckfinder/userfiles/files/12248267447.pdfIn PDF document text
    • http://chiangmai-clean.com/user_img/files/28480844647.pdfIn PDF document text
    • http://sumisaedu.com/FileData/ckfinder/files/20210908_67D35C18747E1185.pdfIn PDF document text
    • http://fermobkorea.com/userfiles/file/20210918170620.pdfIn PDF document text
    • http://evergladesharvesting.com/ckfinder/userfiles/files/wokawefifowanikijekos.pdfIn PDF document text
    • http://synphabase.ch/upload/file/1252664164.pdfIn PDF document text
    • https://xn--pssa17sw71b.tw/upimages/files/dagiwoserarajoxafegupubox.pdfIn PDF document text
    • http://websteravelandscaping.com/editorData/file/bolomusoverewet.pdfIn PDF document text
    • http://garantc.ru/userfiles/file/18487658157.pdfIn PDF document text
    • https://hkbca.org/UploadFiles/file/20210911223636125.pdfIn PDF document text
    • https://interconformity.ro/images/file/47956539276.pdfIn PDF document text
    • http://kerrya.com/ckfinder/userfiles/files/nedezasivuzuxav.pdfIn PDF document text
    • https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/zomusoto.pdfIn PDF document text
    • http://cctechlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/21072483546.pdfIn PDF document text
    • http://ph-easycome.com/userfiles/file/46083604173.pdfIn PDF document text
    • https://apaman.ti-am.jp/js/ckfinder/userfiles/files/4340338926.pdfIn PDF document text
    • http://czminghe.com/upload/files/93976404742.pdfIn PDF document text
    • http://orthocarecentroortopedico.it/userfiles/files/jetuloxu.pdfIn PDF document text
    • https://democv.associasuite.com/imagenes/contenidos/files/7221323626.pdfIn PDF document text
    • http://elitvorota.ru/f/file/lomegunekaxejoxawep.pdfIn PDF document text
    • http://king-tableware.com/uploads/files/202109071652295794.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=beyblade+metal+fusion+apk+downloadPDF 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_off0000cee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE4 11144 bytes
SHA-256: 7181823c14f0141e1b109457445a044601e3a7032345fffcd9361e95115b00e0
font_01_sfnt_off0000e8c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C7 18420 bytes
SHA-256: b9f7d712107615bc3f34a0527765021cf132069ea36b30ba6fb4f044fd727b69
font_02_sfnt_off0001189d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1189D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1