Malicious PDF — malware analysis report

Static analysis result for SHA-256 78e7e425043900ed…

MALICIOUS

PDF

83.1 KB Created: 2021-09-19 11:34:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c5778eb3deeb4b2663e922211989d031 SHA-1: 765cb3ed133866e6755dc0f73c0708d2e74aa5ed SHA-256: 78e7e425043900ed98570fe45ea177d4aab8910318d407ac2037a00b199ce072
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. The PDF contains numerous embedded URLs, many of which are hosted on disposable domains, suggesting a link farm designed to obscure the true destination. One prominent URL, disguised with a movie title, likely serves as a lure to trick users into clicking and potentially downloading further malicious content or visiting a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://library.nesdb.go.th/ic/admin/ckfinder/userfiles/files/62029283891.pdf In PDF document text
    • http://vanguardhungary.hu/userfiles/file/kumajadeda.pdfIn PDF document text
    • http://bojovesporty.cz/userfiles/file/70672523834.pdfIn PDF document text
    • http://commissioncollectionlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xidolilomenik.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613eaa26c23e4---dopavadufebok.pdfIn PDF document text
    • https://olympicwroclaw.pl/zdjecia/fck/file/xunuza.pdfIn PDF document text
    • https://www.colline-eternelle.com/ckfinder/userfiles/files/1279455043.pdfIn PDF document text
    • https://fibaquitaine.fr/cebatrama/userfiles/files/tokexe.pdfIn PDF document text
    • http://www.springperfect.com/upload/finder/files/35104808465.pdfIn PDF document text
    • http://zhodnoceni-penez.cz/is/images/FCKeditor/File/77975075011.pdfIn PDF document text
    • https://funcarele.com/ckfinder/userfiles/files/nomisifutagivokawosutela.pdfIn PDF document text
    • http://cabinet-blin.fr/ressource/site-image/files/lirakidazinimajumija.pdfIn PDF document text
    • https://selapro.com.au/application/third_party/ckfinder/userfiles/files/rijeninesamepigegexo.pdfIn PDF document text
    • http://zensushidanapoint.com/uploads/files/8213246984.pdfIn PDF document text
    • http://kursverwaltung.fit-n-essen.ch/ckfinder/userfiles/files/93714152551.pdfIn PDF document text
    • http://djpress.pl/Image/files/zewobabirilesawi.pdfIn PDF document text
    • https://erdenetpost.mn/userfiles/files/kefuwitirukaruletepuririb.pdfIn PDF document text
    • http://xlpe.net/Images_upload/files/memedomi.pdfIn PDF document text
    • http://tomekorea.com/userData/board/file/goguzekekixekafadaxex.pdfIn PDF document text
    • https://fullmagicweekend.com/ckfinder/userfiles/files/12164783010.pdfIn PDF document text
    • http://swiss-ex.com/images/blog/file/fawovuputa.pdfIn PDF document text
    • http://kunbot.com/upload/files/bumivekuzumes.pdfIn PDF document text
    • https://anbc31.iscriptscloud.com/app/webroot/files/file/muronimij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=hitman%27s+wife+bodyguard+watch+onlinePDF 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_off0000ddc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC1 17856 bytes
SHA-256: fa1d5015925f937f7a86bab8293576b736ffb17c7912296995a171c4da14be71
font_01_sfnt_off00010ba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000123be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123BE 11388 bytes
SHA-256: 4e5b564f3e4377d00b8cf7c36e505ca1de7123544ceb6e2df016d6f6695c3973