Malicious PDF — malware analysis report

Static analysis result for SHA-256 cde92da23ccd8796…

MALICIOUS

PDF

76.5 KB Created: 2021-03-09 05:37:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a88216622e6c256f7df57a253ef089f9 SHA-1: a8ed57af3c8a52991c461952bee24cdd5037af1a SHA-256: cde92da23ccd8796bca4dba07151417b3d519f8938fd84d0b4f4bb54c562eda0
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to disposable hosting, suggesting a link farm designed to distribute malware or facilitate phishing. One prominent URL, 'https://mezovuduw.ru/wix?keyword=sims+3+apk+mod+unlimited+money+download', indicates a lure related to downloading a game mod, likely a pretext for malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://mezovuduw.ru/wix?keyword=sims+3+apk+mod+unlimited+money+download PDF link annotation
    • http://securespot.ru/eolienne_en_mer_dieppe_le_treportgtwfl.pdfIn PDF document text
    • https://cdn.sqhk.co/putizimetiwe/huia0ij/stardew_valley_best_crops_for_greenhouse.pdfIn PDF document text
    • https://cdn.sqhk.co/lijipatalenu/yghiggg/33803221899.pdfIn PDF document text
    • http://stavki.link/ez_loader_pwc_trailer_specsv6dq9.pdfIn PDF document text
    • https://cdn.sqhk.co/fefowofuk/hHAji5E/clash_of_kings_mod_warband_guide.pdfIn PDF document text
    • http://lnstagram-helping-centre.com/vokumomawnza8q.pdfIn PDF document text
    • https://cdn.sqhk.co/bujavenizake/ZidBrrb/canaltech_e_magazine_luiza.pdfIn PDF document text
    • http://hookup682.site/que_es_composicion_centesimal_y_como_se_determinaoy49h.pdfIn PDF document text
    • https://cdn.sqhk.co/nukusigemug/3Yhb9fS/23140223766.pdfIn PDF document text
    • http://dom-bita.org/what_does_write_a_one_page_reflection_meangr3sq.pdfIn PDF document text
    • https://cdn.sqhk.co/tusufawenu/p7ieggg/bubba_shrimp_forrest_gump_quotes.pdfIn PDF document text
    • http://organic100.fun/wild_frontier_game_pcuba7l.pdfIn PDF document text
    • https://cdn.sqhk.co/bugininaxi/8shfwgh/lomezamodunusedopez.pdfIn PDF document text
    • https://cdn.sqhk.co/fetedudi/hdVRgch/easy_basketball_shooting_drills.pdfIn PDF document text
    • https://cdn.sqhk.co/kuburarimoku/eif3jaX/gevukosiwefevig.pdfIn PDF document text
    • https://cdn.sqhk.co/pivokazi/ihcqWih/jojasobur.pdfIn PDF document text
    • https://cdn.sqhk.co/gebitasixa/heLiagJ/radio_italia_solo_musica_italiana_new_york.pdfIn PDF document text
    • https://cdn.sqhk.co/fowipovoji/QjcEhuA/pepoxuwikepifojurubo.pdfIn PDF document text
    • http://cheapestshop.xyz/how_do_i_turn_off_the_hourly_chime_on_my_armitron_watch4bcir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://858e1da1-ad31-4e5b-aec0-89c59c6c71f6.filesusr.com/ugd/6240f8_08bc4b83ec1244358a8311dcce00e8b3.pdf?index=trueIn PDF document text
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_6485231419bc487daefaf373279ea7f5.pdf?index=trueIn PDF document text
    • https://a519209a-2b0a-481f-9fe9-460c873bdc80.filesusr.com/ugd/270e53_55140bebfe724ad1a399395b38cb4a48.pdf?index=trueIn PDF document text
    • https://97783159-ced7-426e-9fbd-60d2bb3342fb.filesusr.com/ugd/00058f_a3032173e4374e0a92a8b4b5c353ec0b.pdf?index=trueIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4B 5536 bytes
SHA-256: 4baab7013b5e96ae96812113ab19a89fb2a0209e4c0593e4d3372ba67088b49c
font_01_sfnt_off0001002a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1002A 10500 bytes
SHA-256: e1ecaddf57590fa75146ed37a7688c706747fa85d70b20d816bc0a8c2628f43d