Malicious PDF — malware analysis report

Static analysis result for SHA-256 865c7213f136f739…

MALICIOUS

PDF

76.7 KB Created: 2021-03-08 00:21:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 904a39e7530f1c537692c2a9613acb6f SHA-1: f9bd2fb0b77887345f742a38dfe225dc904a8b88 SHA-256: 865c7213f136f73945cd5cd46484e3c51d47c2c4ccea077647262a6d7c8b6740
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, including one pointing to 'kuzutuzo.ru' which is associated with game-related search terms, suggesting a lure. The ClamAV detection and ML classifier flagging indicate malicious intent, likely 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 potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://kuzutuzo.ru/wix?keyword=hill+climb+racing+unblocked+hacked PDF link annotation
    • http://hocostyle.ru/bangla_baul_gaan_freezo7bn.pdfIn PDF document text
    • http://esmoney.site/fakazujadikcgdgm.pdfIn PDF document text
    • http://dimukidiri.iblogger.org/hand_powerpoint_templates_free.pdfIn PDF document text
    • http://direkepexeg.22web.org/the_entertainer_lyrics_meaning.pdfIn PDF document text
    • http://streichpack.online/28324323646kxy11.pdfIn PDF document text
    • http://myirn.icu/876535004489tagf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://15319a82-8c66-4906-b3c2-464277991f2b.filesusr.com/ugd/070acf_81dc42b262374599a2d5100c92f7e787.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/zadomejipev.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/butasivofusa.pdfIn PDF document text
    • http://vatikob.epizy.com/mebuku.pdfIn PDF document text
    • http://kotokadi.rf.gd/sharp_aquos_quattron_troubleshooting.pdfIn PDF document text
    • http://verejepaw.epizy.com/belexudavasezabunowuw.pdfIn PDF document text
    • https://11ab4cf5-156d-4417-99e9-5039b2a7eb5f.filesusr.com/ugd/82d61e_0e2532ac98634cde8cff0aa8ff0589ee.pdf?index=trueIn PDF document text
    • http://tixinova.rf.gd/37112913467.pdfIn PDF document text
    • http://diwevobu.rf.gd/fujobepunimijibevawokuma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e40b7973-58d9-4890-a15a-b38f8c094bc8/ritazipevewenoriku.pdfIn PDF document text
    • https://a1d3e036-d9a1-4be1-9d2f-eedbb581cb22.filesusr.com/ugd/3ce946_b2465cec9f7241bd808180b2a56b93da.pdf?index=trueIn PDF document text
    • http://lopumupukerodu.epizy.com/junji_ito_art_book_ikei_sekai.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/can_you_share_a_on_fb_messenger.pdfIn PDF document text
    • http://giwofigu.epizy.com/sesetewozakejusaribag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c54dbfa-c4d4-4588-9812-f0cb6703f846/karns_church_of_christ_sermon_outlines.pdfIn PDF document text
    • https://814cba0f-f649-4223-bfe6-7884e6e02b9d.filesusr.com/ugd/c1108c_4f63cb295b414748903966e786e6b5ee.pdf?index=trueIn PDF document text
    • https://f89b8795-a90f-4359-81e0-6309601a98d9.filesusr.com/ugd/8e7730_1c14ed1a405b400cb67a49a4e3b47882.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/494bd0a4-8585-4eef-a8f6-2a967a4e1d4c/las_crnicas_de_narnia_4_pelicula_completa_en_espaol_repelis.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3E 5340 bytes
SHA-256: a48eef53005752f29d50bdc6304c42a23c3d9519ad3decaea2e54815c684b016
font_01_sfnt_off00010032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10032 11036 bytes
SHA-256: 964835e43e17e245fb5cbc747b1c22911d0d77d0aa5e70afc2ddbb0538ecf472

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