Malicious PDF — malware analysis report

Static analysis result for SHA-256 2544f84a37224bb9…

MALICIOUS

PDF

68.9 KB Created: 2021-03-27 19:01:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d65415c82aefbecdd5199cfea259bd83 SHA-1: 9af9bed0fc049692be5de0de12d9d0503755c2b6 SHA-256: 2544f84a37224bb90fa001e2b97e30552881da03aa6b23b13a6e53db8222c6e7
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a website disguised as a trophy guide. This URL is likely used to host or redirect to malicious content, as indicated by the ML classifier and ClamAV detection. The document body, though heavily obfuscated, appears to contain metadata related to the URL's keyword, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/wix?keyword=trails+of+cold+steel+trophy+guide+and+roadmap
    • https://static.s123-cdn-static.com/uploads/4420934/normal_5fec5bd5eb52d.pdf
    • https://static.s123-cdn-static.com/uploads/4368979/normal_5ff9f36f4131f.pdf
    • http://jawunefuda.mygamesonline.org/47320303835.pdf
    • http://gepanukotex.getenjoyment.net/how_much_model_3_cost.pdf
    • https://cdn-cms.f-static.net/uploads/4420031/normal_6050bbf2be978.pdf
    • https://cdn-cms.f-static.net/uploads/4368226/normal_60483823766fd.pdf
    • http://manuximaxemeje.scienceontheweb.net/pdf_lord_of_the_flies_book.pdf
    • http://pogekoxuw.mygamesonline.org/java_programming_exercises_for_beginners.pdf
    • http://gadatoreneperil.mygamesonline.org/aptitude_test_for_entrance_exam.pdf
    • https://cdn-cms.f-static.net/uploads/4427091/normal_5fe73b7554c7a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://9579f988-9383-433c-acf3-5fff76e0c882.filesusr.com/ugd/191a6d_9c8089efda80451c9cd5405b33988b37.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ef19b595-5b0d-4fe6-bb2b-4e9dc2d44f60/53979475719.pdf
    • https://uploads.strikinglycdn.com/files/de18ddac-194f-4e89-97be-49ff73f60484/15200655356.pdf
    • https://uploads.strikinglycdn.com/files/dcca1099-ca8c-40e8-aa68-a32fc7cd90c3/silent_hunter_4_tutorial_guide.pdf
    • https://uploads.strikinglycdn.com/files/03a9f3c1-f920-427f-8055-0fe664013bda/nefiradosas.pdf
    • http://titugol.atwebpages.com/writing_algebraic_expression.pdf
    • https://uploads.strikinglycdn.com/files/9c8c6423-9eff-4517-ac1e-9875279d42fe/sezaro.pdf
    • https://uploads.strikinglycdn.com/files/0639fb9c-ec39-4f66-bcc5-3edafb550165/why_is_risk_assessment_important_in_health_and_social_care.pdf
    • https://uploads.strikinglycdn.com/files/0f13957c-906b-49ba-8d92-18075d99f8f0/jexiridi.pdf
    • http://pevogikuxupeja.onlinewebshop.net/where_can_i_buy_parts_for_my_shark_vacuum.pdf
    • https://7ae52be2-ba3c-41fb-8935-29281088223e.filesusr.com/ugd/affaa6_8ddac5b091d7470bbea583b7d4f52a87.pdf?index=true
    • 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_off0000cef6.bin
3a84adc34ae97faf38e7bbcf6afa1c3a48d4c025d5b0d187007076d3cbaea04f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF6 5620 bytes
font_01_sfnt_off0000e1f0.bin
d5373e51bc424f136e965f8d35a3e20b0d28b89453b9e715af2800f073ed73e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F0 10044 bytes

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