Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d2862cef2217dcd…

MALICIOUS

PDF

93.1 KB Created: 2021-06-26 01:53:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4a37e78b0fb7c802364727c1348619a7 SHA-1: 3e6a7880497fcd5170df1fd0235636860c2ac134 SHA-256: 4d2862cef2217dcda3baa8cb1000e288a72ba3de710119a3b8914509b62d703a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites. These URLs are likely part of a link farm designed to redirect users to malicious content or phishing pages. The ML classifier also strongly indicated maliciousness. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 5

  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/7590b85d390f5ad7e07a42c03de66d8e/lewajubobujusorox.pdf
    • http://xn--eyt274i.com/upload/files/11692571265.pdf
    • https://artlabjo.com/userfiles/file/81785778897.pdf
    • http://maihome.hu/admin1/file/jususewavizumuvej.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/chv5dgvoa1cndacmn8sv3rrn8m/sawunikuvafejejiduwoset.pdf
    • https://bouveau-consulting.com/userfiles/file/foxobamosijegonufaritu.pdf
    • http://blessedfamilycovenant.org/clients/c/cb/cb727bc273eb4203dc66fb73741ae5ae/File/80237289836.pdf
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/qglhk83a29anfsu0b0dipf90hd/66104190395.pdf
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/146bc32139298fe1a4cc910e57b83aea/deruvokowi.pdf
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/afe8cedba47d7b59a2189f7a9c079e23/36952184979.pdf
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160b2a8bbb26af---xilebonotilakotedebo.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c97c35ca3a---nizelilanewanitaw.pdf
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca20c84718---piwotej.pdf
    • https://pet-fashion.ro/mm/file/nuxedumasofivaxowijina.pdf
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090d9f2bf560---jejomeditimivax.pdf
    • http://texmet.pl/userimages/file/5106738832.pdf
    • https://fibaquitaine.fr/cebatrama/userfiles/files/xuzuwigidababejiw.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16086862d00e10---98794527731.pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16099787a678f8---45341247858.pdf
    • http://rld-carbon.ru/file/xepimiwotefele.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/225931275ecc54b337da01b138060048/dodozotojixefexumojat.pdf
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/753eff74b086de838c536e78cbdbe058/51076806509.pdf
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a0427498d4d---59382554941.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=electron+dot+structure+of+magnesium+and+oxygen
    • 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_off0001022e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1022E 16792 bytes
font_01_sfnt_off00011a45.bin
86cd40717f325b01ce499ce5a16683c5c1fe6972efaba92be940f2a4b32a82f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A45 11120 bytes
font_02_sfnt_off00013402.bin
f1d62708d0ccd94ecf41c2d7b275b503a362051f07910a163bef39372e96f517
pdf-font-stream PDF embedded font (sfnt) at offset 0x13402 18812 bytes