Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc31d39b8166e3b8…

MALICIOUS

PDF

77.2 KB Created: 2021-02-20 06:44:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d732e8affb541e950b7725a92d51c80c SHA-1: 20181c6603a04217525bf9f499642ea442091920 SHA-256: fc31d39b8166e3b8764a3eee8cd91f3504b6bfaf3d80d0f71247248fbe494209
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate maliciousness. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'ark mobile cheats 2020', directing the user to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • 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://jacksth.ru/wix?keyword=ark+mobile+cheats+2020 PDF link annotation
    • https://cdn.sqhk.co/kekelivig/7ZggChh/linear_regression_equation_formula.pdfIn PDF document text
    • https://cdn.sqhk.co/jokawefezo/ja8xaXK/cut_the_rope_3_free_online_game.pdfIn PDF document text
    • https://cdn.sqhk.co/nemuvefik/abjghc4/61444605164.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496193/normal_5fe22b53edb2a.pdfIn PDF document text
    • https://cdn.sqhk.co/sisuriwul/5hjhjBQ/dotaxidujasak.pdfIn PDF document text
    • http://busevabafumoje.iblogger.org/free_android_file_transfer_app_for_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/remowiwa/FgjeOAQ/7881589803.pdfIn PDF document text
    • https://cdn.sqhk.co/dujujema/jg5hgX6/naxavipifidilopujabagexo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460983/normal_5fdfd3181c04a.pdfIn PDF document text
    • https://cdn.sqhk.co/depivuni/j91iggc/football_undrafted_free_agent_salary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496001/normal_601da1607b859.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwopaperuv/fccDy2l/tiny_house_company_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490140/normal_600d4fb83811f.pdfIn PDF document text
    • https://cdn.sqhk.co/wusezofetib/bjcNhjm/draw._io_github_wiki.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/zasepo/adobe_acrobat_pro_x_suite_v1._x.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/sawitebesapuzekuri.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/35625136010.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/37891416157.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/wemosolaril.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/63488617242.pdfIn PDF document text
    • http://lilufafuf.epizy.com/algebra_1_student_journal_answers_chapter_5.pdfIn PDF document text
    • http://tagitefidunun.epizy.com/bacteria_classification_bergey_s_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/49908844829.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_off0000e359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE359 5188 bytes
SHA-256: e981bd7cead2efd316cd31032beadbd775fd3a7f1ffde3ad418c48db989e1e60
font_01_sfnt_off0000f4ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EF 10676 bytes
SHA-256: f03fec14dc77e38089287865c6e1f8e7f5a49f780e1851b3add2c2777459e8b8
font_02_sfnt_off0001198d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1198D 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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