Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebeb3b18b7d8f889…

MALICIOUS

PDF

80.9 KB Created: 2021-09-12 15:10:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 43c9e3ac928c466cf815f602dab51de4 SHA-1: 956f07e097a1335eb7f052b80b24dd6d043acefb SHA-256: ebeb3b18b7d8f889b9ed744378e42f40f93555f60394c6245ce844b35514b32e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains and are structured as a link farm, a common tactic for distributing phishing content or malware. The presence of these numerous, potentially malicious URLs suggests an attempt to redirect the user to a compromised or malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://ezgoe.com/10005001208290177/ckfinder/userfiles/files/vebafexefegugixefiwu.pdf In PDF document text
    • http://www.pro9apps.com/app/webroot/files/uploadimagesfile/kinumemadakifos.pdfIn PDF document text
    • https://gyn-koe70.de/obrazky/file/xovok.pdfIn PDF document text
    • https://vieclamlaocai.vn/webroot/img/files/xogok.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/082a5e9f9bc102c41ce68cb7eaa730fe/15175814810.pdfIn PDF document text
    • https://neksav.com/upload/ckfinder/files/34062831441.pdfIn PDF document text
    • http://rentbucharest.net/images/userfiles/dofujozojadosupur.pdfIn PDF document text
    • http://liubeauty.com/luutru/files/pexajegojalamefi.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/31123091483.pdfIn PDF document text
    • http://abpjseah.news-read.com/upload/files/lamelarinuzutodan.pdfIn PDF document text
    • https://tempatpasang.com/contents/files/gafigotidovegibeb.pdfIn PDF document text
    • https://eltonltd.ru/sites/default/files/uploads/28984211782.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/93088782635.pdfIn PDF document text
    • https://produktybhp.pl/pliki_user/File/60354637144.pdfIn PDF document text
    • https://doanhnghiepvietnam.org/img_duhoc/files/fafenibanope.pdfIn PDF document text
    • http://ziguratex.com/helpdesk/app/webroot/img/userfiles/files/gokadesoje.pdfIn PDF document text
    • http://eko-uklid.com/files/file/natol.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613613ce9f267---kikafore.pdfIn PDF document text
    • http://www.pvvc.cz/files/42294627364.pdfIn PDF document text
    • https://edubox.mn/uploads/users/0/files/ropunuzezelizumobuwilali.pdfIn PDF document text
    • http://inbond-cn.com/userfiles/file/vexenovegobuzudoli.pdfIn PDF document text
    • http://rosabaum.de/web/editor/files/dolapiveduxenevezogugul.pdfIn PDF document text
    • http://a2kat.ru/userfiles/file/zipirokowulewawilitex.pdfIn PDF document text
    • http://rlponder.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/63176536048.pdfIn PDF document text
    • https://divanich96.ru/admin/ckfinder/userfiles/files/33809035082.pdfIn PDF document text
    • https://aedwea.com/upload/foto/jesilisukutopizufubupor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=mov+player+apkPDF 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_off0000d365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD365 10048 bytes
SHA-256: b363a04573f62f565489e122b150a2afc7a4ccd8ad46fb1f5f635d6bde680986
font_01_sfnt_off0000e9e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E8 19992 bytes
SHA-256: 1445b85bd13adbf6814a9cc7267d08c526ef7e42c8ee88595eae2653306420d3
font_02_sfnt_off00011df1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1