Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9973532352a17a5…

MALICIOUS

PDF

91.3 KB Created: 2021-04-10 07:06:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8705891e3733d526b435a1a94b6d07fa SHA-1: 89814aadb8457b1976456c9ec0713305bc50d54a SHA-256: a9973532352a17a5c584daed88a304ab3dcb406205261828a11089390fcf7169
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs and heuristics indicate it functions as a link farm, directing users to potentially malicious domains. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/strik?utm_term=three+estates+of+france
    • https://cdn.sqhk.co/wevemugas/wPDCHgc/24839601462.pdf
    • http://devlp.club/karafojumojodabujkhek7.pdf
    • http://tokepubex.getenjoyment.net/93731380927.pdf
    • http://paxijivatebul.getenjoyment.net/pemur.pdf
    • http://ogranicbio.space/mokozasikamcn0c3.pdf
    • http://wajofima.mywebcommunity.org/mofatub.pdf
    • https://cdn.sqhk.co/fiwojosop/ihcuezg/guitar_caged_system.pdf
    • http://xinuvaro.sportsontheweb.net/39188028124.pdf
    • https://cdn.sqhk.co/welosezu/jlRgcvK/15054639502.pdf
    • https://cdn.sqhk.co/togareguko/iTbhhib/92183668548.pdf
    • http://pubgmobiie.com/tatogifotilqbgr.pdf
    • http://help-copyrightservice.xyz/126088301353m1l2.pdf
    • http://dodajavux.scienceontheweb.net/nugibonazasefivekel.pdf
    • http://rajukilodagoje.mygamesonline.org/42833042212.pdf
    • http://lefibipefazefep.mypressonline.com/the_real_book_of_real_estate_audiobook.pdf
    • http://idealslimitaly.site/150514050273964z.pdf
    • http://bukupiduge.mypressonline.com/kepuxatel.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xisuwujilaxemer.myartsonline.com/13174538134.pdf
    • http://nizowozutagele.atwebpages.com/fojag.pdf
    • http://fubavinexazixo.onlinewebshop.net/the_dawning_of_gauge_theory.pdf
    • http://nibemodida.myartsonline.com/12218657433.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
    • 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_off00010ffd.bin
1cfa60812693cb0d3acbb8e22b03f2f977810269267101f931cd6435458b32f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FFD 4888 bytes
font_01_sfnt_off00012093.bin
14483d04e3746881a5071379773c64758169a9a198494411d362ae8a7293ef8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12093 11884 bytes
font_02_sfnt_off0001491b.bin
c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1491B 16204 bytes

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