Malicious PDF — malware analysis report

Static analysis result for SHA-256 a52c9701324afb19…

MALICIOUS

PDF

80.7 KB Created: 2021-02-22 16:20:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 1020f4765ca99d669c336b59ba0bdfe3 SHA-1: e4e6d31c06e6b8bc964ed966804818ac2b224f23 SHA-256: a52c9701324afb19bc59b48ff5eaf7285990660cdcffc49d7f1bf9e881a95574
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 phishing site disguised as a grammar quiz. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious domain for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://seumenha.ru/strik?utm_term=grammar+quiz+6th+grade PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448110/normal_600d24d368249.pdfIn PDF document text
    • https://cdn.sqhk.co/nukunudakiju/V1URijH/minecraft_worldedit_plugin_tutorial.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375521/normal_5fe2d15828a98.pdfIn PDF document text
    • https://cdn.sqhk.co/gotakavapu/jajfgd9/54952712180.pdfIn PDF document text
    • https://cdn.sqhk.co/jusupovexewa/cL9U1W4/quran_learning_app_offline.pdfIn PDF document text
    • https://cdn.sqhk.co/remezebona/LhfstII/4_pic_1_word_4_letters_leaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471691/normal_5fdc60f12926e.pdfIn PDF document text
    • https://cdn.sqhk.co/wepigosogo/jrgejio/79409646474.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391896/normal_5fd306e5a8004.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/pomaxa/adobe_after_effects_audio_visualizer_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/boletin_informativo_sobre_la_salud.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/reliability_indices_report.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/salujezen.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/mufitu.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/refrigeration_and_air_conditioning_iti_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/sociologia_enem.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/bhindeshi_tara_by_ashes.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/gifojizukogiwadegodefe.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/binary_addition_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/game_burnout_3_takedown_ps2_iso.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/pixujed.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6E 5056 bytes
SHA-256: b437aef0e35673f0f1e21249ff2c49c43b4a5d2d66ff3b7dffa928dfebe93b1b
font_01_sfnt_off0000ee9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9D 10452 bytes
SHA-256: 642c12e53889c93507fedddc0caa4c743044d086563bd5dda7e9e3dbe9cb769f
font_02_sfnt_off00011278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11278 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2
font_03_sfnt_off0001273f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1273F 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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