Malicious PDF — malware analysis report

Static analysis result for SHA-256 e97f97a606de3995…

MALICIOUS

PDF

76.4 KB Created: 2021-09-17 08:50:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1e05e5825833aebfaab781c9da61ba48 SHA-1: 2440513cf405a7888f5bc3c593e26a5c77e92677 SHA-256: e97f97a606de3995b730dd5196988578243a6bb46f8174798c01960030734722
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many of which point to disposable hosting and appear to be part of a link farm designed to redirect users. The presence of external URIs and the overall structure suggest this document is intended to lead users to malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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 https://pistant.ru/uplcv?utm_term=dragon+ball+z+episode+1+free
    • https://hophamthaibinh.com/upload/files/xologovipunukubamop.pdf
    • http://kaiyudachem.com/filespath/files/20210906074524.pdf
    • http://orikon.net/Images_upload/files/12478650725.pdf
    • https://speculatio.in/ci/userfiles/files/dadow.pdf
    • https://bestcaps99.com/ckfinder/userfiles/files/gijupewivonobovorigizirol.pdf
    • http://nextgenship.net/upload/file/20210913163156035745.pdf
    • https://mt-creativestudio.com/ckfinder/userfiles/files/25549065199.pdf
    • https://olamare.com/img/uploaded/file/47752788712.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ee21585535---muwevip.pdf
    • http://pusancard.com/userData/board/file/gupobamolo.pdf
    • http://remaining-mc.de/userfiles/file/natili.pdf
    • http://abbuffalowings.com/uploads/files/bamasiloxote.pdf
    • https://chungangroup.com/uploads/files/202109160526372519.pdf
    • http://fulepmark.hu/nyebu/fulepmark/userfiles/file/64740542832.pdf
    • https://rajatotogroup1.com/contents/files/namulofanisafiwadutonob.pdf
    • https://repare-ton-smartphone.com/userfiles/file/zujuj.pdf
    • https://godahoian.com/app/webroot/upload/files/73760125109.pdf
    • http://thibangoto.com/app/webroot/uploads/files/70719380154.pdf
    • https://quangcaonoithatgiahung.com/admin/webroot/upload/image/files/5801769583.pdf
    • http://fitviewer.com/files/file/38789728376.pdf
    • http://jjc-dev.com/userfiles/file/bupufolubigejagaxizobubel.pdf
    • http://aroma-es.site/yamituki-n/uploads/files/35854811996.pdf
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/a80da6c447b3345d290d6dae2609669e/tuxileni.pdf
    • http://hanboo.cn/Uploads/file/2021090909261770554.pdf
    • https://euroquimicadistribucion.com/zabaleta/data/imagenes_contenidos/file/sejeligozogusanekezu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c37b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC37B 16792 bytes
font_01_sfnt_off0000db92.bin
a656044e1867e590c2ec3a049168458a296a8c02da5d15fb9631056c6c262f56		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB92 10828 bytes
font_02_sfnt_off0000f43e.bin
6fa5b39246bf777656783005796ee3143442ac047ee775006384f0d00083c077		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF43E 17944 bytes

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