Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9382ee328112e00…

MALICIOUS

PDF

67.6 KB Created: 2021-09-25 17:10:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 99baab7bdabe87a38c95ac3f4cca294a SHA-1: 3445ab2ac37dfd264bcdbc3cb40d36d2ef2f7af5 SHA-256: e9382ee328112e003e570093af75290f8936087d94adb9725812ac76b144214c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which are structured as link farms, suggesting a phishing or malicious redirection attempt. The presence of a URL with 'utm_term=download+for+gta+v+android' indicates a lure to trick users into downloading potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://sealskinz.ru/files/file/jeluxavipamewedolugat.pdf In PDF document text
    • http://acupunctuuryao.nl/ckfinder/userfiles/files/1610001283.pdfIn PDF document text
    • http://backupcenters.com/userfiles/file/zomaxefi.pdfIn PDF document text
    • https://ww150005.linebot.net/upfile/files/20210925131430.pdfIn PDF document text
    • http://elosc.com/upFile/file///ITX202109100001246658.pdfIn PDF document text
    • http://rheumatology.institute/upload/content/file/81672709917.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/zenuxunojuked.pdfIn PDF document text
    • https://nordavril.com/userfiles/file/foveletozivuf.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/c72017572e9c68de06d7d2829abcdf02/werobopekupemigovuzipilos.pdfIn PDF document text
    • http://aroma-es.red/yamituki-n/uploads/files/72275987466.pdfIn PDF document text
    • http://coutleelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/698642328.pdfIn PDF document text
    • http://toszegisuli.hu/userfiles/file/89305096271.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/34001584065.pdfIn PDF document text
    • https://ecowaytechnologies.com/ckfinder/userfiles/files/xarutegiwatusiwalibit.pdfIn PDF document text
    • http://eegbiofeedback-leszno.pl/userfiles/file/letabubetabumuvajagazexob.pdfIn PDF document text
    • http://wideanglepackaging.com/ckfinder/userfiles/files/wonulilofavuvixitarapilut.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/mokesu.pdfIn PDF document text
    • http://uat2.hkha.com.hk/ckfinder/userfiles/files/54765690219.pdfIn PDF document text
    • http://emachn.com/data/attachment/file/62621717185.pdfIn PDF document text
    • https://kabelkyaobuv.sk/editor_uploads/files/38461925772.pdfIn PDF document text
    • https://www.gurkhasfinance.com.np/ckfinder/userfiles/files/suxobonid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=download+for+gta+v+androidPDF 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_off0000abeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABEB 10380 bytes
SHA-256: 3256522912c80814bf05836fe0395407c6fd36d7c09ad9f610609a00e011d11f
font_01_sfnt_off0000c351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC351 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000db63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB63 14920 bytes
SHA-256: 537b38991c2dd55360d9e50b8c6dfd053de67349c770e31f6fc3e5d5d6332492

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