Malicious PDF — malware analysis report

Static analysis result for SHA-256 be7d8874c62b2bed…

MALICIOUS

PDF

73.7 KB Created: 2021-03-16 11:32:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: d04179c902b7701f016e7ab7fef52cd6 SHA-1: 052a710210902f6a9d3e80d898fb4ea391059221 SHA-256: be7d8874c62b2bedef4960943d9f38bab9f938babc4df2d19dddbdca8e990933
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to a suspicious domain ('mezovuduw.ru') that is likely used for malicious redirection. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a high volume of links on disposable hosting, suggesting a tactic to obscure the true malicious destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/123?utm_term=agartha+murudzwa+songs PDF link annotation
    • https://cdn.sqhk.co/loganidob/glOtqjd/cast_iphone_photos_to_vizio_tv.pdfIn PDF document text
    • http://kyukty68.xyz/202996519681pakj.pdfIn PDF document text
    • http://chemistryplus.space/fofaxexelesaloxazixsyine.pdfIn PDF document text
    • https://cdn.sqhk.co/videbamez/jdgehbh/scary_wolf_online_multiplayer_game.pdfIn PDF document text
    • http://bionatur.space/nijijowiniwasureg8nhk.pdfIn PDF document text
    • https://cdn.sqhk.co/guwezasov/heF3uL4/photo_editor_collage_maker_descargar_para_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/mibuxedufexi/fbheV0K/93769488003.pdfIn PDF document text
    • http://dvestideyli.xyz/kenneth_burke_language_as_symbolic_action35hb8.pdfIn PDF document text
    • http://kitixukizogutik.mygamesonline.org/muzujumojasomijeg.pdfIn PDF document text
    • http://centerbluebadge.com/il_paradiso_perduto_di_miltonewikd.pdfIn PDF document text
    • https://cdn.sqhk.co/sefibenip/he1jhtr/auto_reply_text_apple.pdfIn PDF document text
    • http://fabujisaw.mygamesonline.org/kunavowixutavomexokodo.pdfIn PDF document text
    • http://sinoxaju.mygamesonline.org/the_open_window_characters_vera.pdfIn PDF document text
    • http://itayoga.space/zomukorakijutixozamur5xl92.pdfIn PDF document text
    • https://cdn.sqhk.co/xebibugekux/hagihaN/mifonodesutasabozava.pdfIn PDF document text
    • https://cdn.sqhk.co/jakatote/ehjbgi2/jubowetabiwamozus.pdfIn PDF document text
    • https://cdn.sqhk.co/lewivapawo/hmaje2E/walking_zombies-_plants_guard_wars.pdfIn PDF document text
    • http://gprofights.ru/xolufekotafig46qs.pdfIn PDF document text
    • http://vvvvvvvvvvvvvvvvvvvvvb.xyz/874454030674ahqz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lewuli/ginamovuf.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/fuvusa.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/dewalt_3400_pressure_washer_owners_manual.pdfIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD518 5056 bytes
SHA-256: 9eb59a522138ccf37b60f81a68ec652bd45911fa8fc8dfdf433912dd03b202c1
font_01_sfnt_off0000e62c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62C 11376 bytes
SHA-256: dbf55a14644f389abf6966b1836c299d219c8c83d95d215587eba1c7a47e4832
font_02_sfnt_off00010c91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C91 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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