Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bc47df33861545b…

MALICIOUS

PDF

87.5 KB Created: 2021-03-21 11:51:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bee7ff6e2028db65efb1b471b78e17a0 SHA-1: b22eab603299b22243e5221936f519f408ce1d90 SHA-256: 1bc47df33861545b126e4253ca6d5977a19611d02f8410066108575f81f02c20
156 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. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains numerous external links, with the primary suspicious URL being 'https://seumenha.ru/wix?keyword=jurassic+park+operation+genesis+pc'. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution attempt, likely leveraging the 'Jurassic Park' theme to entice users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/wix?keyword=jurassic+park+operation+genesis+pc
    • https://cdn.sqhk.co/jekuzedu/TtLgRc0/30544161478.pdf
    • https://cdn.sqhk.co/xugavizira/hoa1Lge/50691390162.pdf
    • http://puveputado.sportsontheweb.net/how_to_get_secret_menu_on_samsung_smart_tv.pdf
    • https://cdn.sqhk.co/kuwusemob/ChJqhfz/maxeruzigijuk.pdf
    • http://tofotibuwul.sportsontheweb.net/jodi_picoult_handle_with_care_free_download.pdf
    • http://ladekepevij.mygamesonline.org/49243959347.pdf
    • http://siviveko.getenjoyment.net/arabic_alphabet_tracing.pdf
    • https://cdn.sqhk.co/niramojiga/eidIibB/26598821023.pdf
    • https://cdn.sqhk.co/xeliwiwogivo/UuIhbgg/26614223964.pdf
    • https://cdn.sqhk.co/zarifabidit/4igPjgE/zombie_farm_in_athens_ga.pdf
    • https://cdn.sqhk.co/nilamemiw/dAaKbAC/japanese_alphabet_translation_app.pdf
    • http://ferabugajefelam.mypressonline.com/advantages_and_disadvantages_of_whistleblowing_in_organisation.pdf
    • http://rezexepenoma.scienceontheweb.net/mubewejopirokudaratuzos.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://61069a5e-3c5f-4884-a3c7-8c7552058b74.filesusr.com/ugd/0789d5_742ca3e16034433eabf136c90c1c6e06.pdf?index=true
    • https://af431a04-9ebc-4ea4-a98d-45e4ffbfad14.filesusr.com/ugd/485053_9875a6a7cd1d4bfbafcfdaab20c45852.pdf?index=true
    • https://8c77b9b7-c39b-43d6-9406-6086bd2c0f93.filesusr.com/ugd/ee6770_ac0439efc4154621ad3143e6d1677238.pdf?index=true
    • https://44dd6259-7513-41c7-b2f1-b2b1fc385d2e.filesusr.com/ugd/63022f_f9134e8bebff4a74abff3e00927d5907.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c136d09a-b1f3-4eb4-aaeb-c533cad28e65/is_diablo_2_still_active.pdf
    • https://uploads.strikinglycdn.com/files/0d891692-3a93-4ff5-a94f-09ce33a1d98c/types_of_curriculum_vitae_templates.pdf
    • http://pudugivifo.myartsonline.com/english_grammar_questions.pdf
    • http://kojenixerog.myartsonline.com/lamomi.pdf
    • http://rukosivujuxu.atwebpages.com/gurujojoji.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_off000119b5.bin
5b317b31e9b44a00b0a4e64610f7f8c9294b0ceede39273df5304a0008a8a9e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119B5 5120 bytes
font_01_sfnt_off00012b35.bin
ea88421d100ed8c7d97313442c065884edf5b482955e1f357dfe15f18da77717		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B35 10856 bytes

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