Malicious PDF — malware analysis report

Static analysis result for SHA-256 814cdfe20fc8bff1…

MALICIOUS

PDF

90.1 KB Created: 2021-03-30 09:25:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 43139c184b37fdcaef2431847ee04f06 SHA-1: f365b8c39ea335b0c72ab92eb0b7968fa415e266 SHA-256: 814cdfe20fc8bff1ff7f62e353db5ff7221edc3dce168263de6adddc5ea8d91b
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, suggests a lure related to an "Android app development guide". The presence of multiple unknown URLs, including one pointing to `botokaw.ru`, further supports a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure itself likely contains malicious content or redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • 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://botokaw.ru/award?keyword=android+app+development+guide+pdf PDF link annotation
    • http://giwewigipebi.medianewsonline.com/36431310659.pdfIn PDF document text
    • https://cdn.sqhk.co/vupapevixu/sihjiih/run_rabbit_run_scary_movie.pdfIn PDF document text
    • http://bafedudovodamo.medianewsonline.com/pepamojaf.pdfIn PDF document text
    • http://nedavupagisezim.mygamesonline.org/44881572953.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378834/normal_5fe6536c280e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470821/normal_604017f34e462.pdfIn PDF document text
    • http://xunopapazugatar.medianewsonline.com/35137699404.pdfIn PDF document text
    • http://gukiduwonaxinef.getenjoyment.net/domamukasuzalebolamogodav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477408/normal_605a2eb5251fc.pdfIn PDF document text
    • https://cdn.sqhk.co/wiwuwigo/dxPhha6/walmart_neighborhood_market_springfield_mo_mt_vernon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420030/normal_6011d79e79402.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/lunojol/xuwubibutifijo.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/wifatirineduxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7b542e9-008c-4ad4-8cf5-823a8fd09965/usmc_junior_enlisted_performance_evaluation_system.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/61444418416.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab2350bb-37fe-4c64-9b1f-491597f23e73/javascript_interview_questions_and_answers_for_freshers_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/daxumakoji.pdfIn PDF document text
    • http://mukanebesiva.atwebpages.com/articles_a_an_the_explanation.pdfIn PDF document text
    • http://vibirokudod.myartsonline.com/hemophilia_disease.pdfIn PDF document text
    • http://jelunegizubu.atwebpages.com/antonin_artaud_heliogabalo_o_el_anarquista_coronado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9139207c-47d7-49b3-b4f8-9cc0549a46bf/7556324613.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/chutney_varieties_in_tamil.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_off0001125b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1125B 5116 bytes
SHA-256: 49291161b740982fde200111f78552f934a0869b27dacb5a255be989bc45c1d9
font_01_sfnt_off000123b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123B2 12052 bytes
SHA-256: 719c447e6587bd6b0e3f9db4657e1559f0295c32855fe760f8886807bb289ee0
font_02_sfnt_off00014c8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C8F 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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