Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3a9b3b8bb88bdee…

MALICIOUS

PDF

101.2 KB Created: 2021-03-18 10:00:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53f2736f306d6d705f1eba5889bf2374 SHA-1: e9d075347f7d13b6bec4c60027c1d57a932689f2 SHA-256: f3a9b3b8bb88bdee6c1acf55ef8a91b9af8841e3aec991552230258f55b2f939
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are numerically or generically named, suggesting a link farm designed to manipulate search engine results. The primary malicious URL identified is 'https://soxebez.ru/wix?keyword=la+la+land+pelicula+completa+online+espa%25C3%25B1ol+latino', which is likely used to redirect users to potentially harmful content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/wix?keyword=la+la+land+pelicula+completa+online+espa%25C3%25B1ol+latino
    • https://cdn.sqhk.co/jigixomavola/iUjhbKC/79816295951.pdf
    • https://static.s123-cdn-static.com/uploads/4412570/normal_5fdcf0fc27b66.pdf
    • https://cdn.sqhk.co/sudidoxa/idifiaX/sleep_sounds_app.pdf
    • https://static.s123-cdn-static.com/uploads/4369509/normal_5feb74bc18d62.pdf
    • https://cdn.sqhk.co/felinavaw/hjcKpE5/outdoor_go_kart_racing_in_las_vegas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1f52b389-d488-44ef-8d95-3479ff32310b/91164154557.pdf
    • http://nivigiwaragere.epizy.com/the_firm_john_grisham_characters.pdf
    • https://6739ca04-605d-4ff4-b4c9-4e5bd75a7819.filesusr.com/ugd/031dda_766312857e294467bd1821bb9dc899ba.pdf?index=true
    • https://uploads.strikinglycdn.com/files/456a7bc7-6311-4f60-89e5-b88ef4ddf0d1/weber_spirit_e-210_grill_dimensions.pdf
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_a292e709232e400db5c4b5071449cf85.pdf?index=true
    • https://835a0401-7144-467e-aacc-710587930ffc.filesusr.com/ugd/432cba_40071af481a94735ad3d41da5b36b7a0.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d385e955-96dd-49e7-a421-ab5700433997/hp_deskjet_2541_connect_to_wifi_without_computer.pdf
    • https://7aff118d-26f6-4d76-9bc9-1838009e7274.filesusr.com/ugd/f80014_ca7c06e843be434d829ab39a3aad5b11.pdf?index=true
    • https://b860438a-ced3-4995-86f2-ad9a24e3f15c.filesusr.com/ugd/938eb2_72e1d680cad84e5ab9923aaba950230c.pdf?index=true
    • http://vokozebutiri.rf.gd/85248353161.pdf
    • https://eda93683-a6ca-45e9-8056-ca7adea7f1dc.filesusr.com/ugd/d655db_7ec7cd2cfc714df2aa7712f7e7fb65b1.pdf?index=true
    • https://7980b0ff-2efe-48f4-a442-6c87bca80713.filesusr.com/ugd/9bd8c3_d651552c3ba54053bf695091d15e98b9.pdf?index=true
    • https://521a9f5b-5c7e-4f25-a9e4-5446fb1b1975.filesusr.com/ugd/c1a494_53872a9ac14b4d219aaf0b65aa2abde2.pdf?index=true
    • https://9539e3d7-93ad-434a-85ac-22bd9bdb82bb.filesusr.com/ugd/df7b34_3b00525105364d8298d65235c1512948.pdf?index=true
    • http://nesitobika.rf.gd/b._f._skinner_walden_two.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011de4.bin
127b44c9f93874c96d25eb7ddc4688780d8877ce931cf296363fb5748d8d514b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE4 6744 bytes
font_01_sfnt_off00012ecb.bin
e9723a4609c60815642865baec9bc2fdc80fdb24e62d0bb3a0e23f43a1ada572		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12ECB 5276 bytes
font_02_sfnt_off0001406b.bin
7870aa668ef45679ff18a896cf34bba35d0eb89e8c4b03f1405733d34ec75093		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1406B 13176 bytes
font_03_sfnt_off00016ae9.bin
5d1897695c1120867c0b0ad98a77f9019a9cab55de928e98ed8bf3ed6b36f18e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16AE9 17748 bytes

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