Malicious PDF — malware analysis report

Static analysis result for SHA-256 9240d2b7521f124c…

MALICIOUS

PDF

74.1 KB Created: 2021-03-04 05:15:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: badfd84e52e051c89fdb963b616a72ab SHA-1: 7c152d0454cd01f0f79355e1a98e924b5e27c02a SHA-256: 9240d2b7521f124cb29c1c37dc9ce4f006654ec408dc43424807a27636dae643
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with one specifically flagged as an external URI pointing to a suspicious domain. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's acting as a link farm designed to redirect users. While no scripts were explicitly extracted, the presence of embedded URIs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a pattern of redirecting users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://pelibifir.ru/123?utm_term=what+is+north+atlantic+treaty+organization+%2528nato%2529
    • http://wodunobogigav.22web.org/pazikenopixoxekewuzakaga.pdf
    • https://lozexisivebuzon.weebly.com/uploads/1/3/4/7/134702594/928959.pdf
    • http://weviwoza.22web.org/fawogepelozeligofiv.pdf
    • http://fodamibokaf.66ghz.com/cyanogenmod_9_free.pdf
    • http://teleporttur.ru/mailchimp_edit_template_htmll4y59.pdf
    • http://sberbank.services/gijakifuzigu4ux3g.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vatasinunevuto.epizy.com/xilamelesujeluvon.pdf
    • http://paporoj.rf.gd/bikezidetagifegirovumuj.pdf
    • http://tazolupiviroliz.epizy.com/66470753134.pdf
    • http://lalurupid.epizy.com/lifenuverizugiwuf.pdf
    • http://fosekor.epizy.com/adobe_premiere_pro_cc_2017_free.pdf
    • http://jagupawef.rf.gd/86609198674.pdf
    • https://s3.amazonaws.com/domegagowevag/annual_report_nestle_2013.pdf
    • http://muwaziri.epizy.com/change_chrome_background_color_android.pdf
    • http://gonuwufif.epizy.com/98883267717.pdf
    • http://vodugesivizere.epizy.com/88380430879.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e605.bin
ce14ef3ff94a228e5dac8ed487eec2654c0f210fc33849099a01cb1c647c8b14		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE605 5380 bytes
font_01_sfnt_off0000f877.bin
b04c857c1a0a3b389f5ef7b93f5c67868c425576d280a9895bfcb0f6caaa6992		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF877 10208 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.