Malicious PDF — malware analysis report

Static analysis result for SHA-256 8662db3dd0630677…

MALICIOUS

PDF

95.0 KB Created: 2021-03-30 03:50:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 905efb6edc5ca5ee56c742bea913c71b SHA-1: 7a1d04b3f5feae165687032ade4d733bed55f790 SHA-256: 8662db3dd06306774adc6ee46c907be618a7c87dd48104b6a51b34f248e663ee
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://dafemum.ru/strik?utm_term=fundamental+concepts+of+elementary+mathematics PDF link annotation
    • https://cdn.sqhk.co/videmixolute/ibahcii/14013420161.pdfIn PDF document text
    • https://cdn.sqhk.co/mumeriretepi/gfigia2/89568111053.pdfIn PDF document text
    • http://vusejulene.iblogger.org/birchington_primary_school_ofsted_report.pdfIn PDF document text
    • https://cdn.sqhk.co/tamaladafa/ihgihda/earn_free_recharge_by_downloading_apps.pdfIn PDF document text
    • https://cdn.sqhk.co/sozaxejiv/gd0qzhf/automotive_color_shift_pigment_powder.pdfIn PDF document text
    • http://sivolejujivozul.scienceontheweb.net/kasojaxujapum.pdfIn PDF document text
    • https://cdn.sqhk.co/mujutuzidip/Sigifhh/46891966208.pdfIn PDF document text
    • https://cdn.sqhk.co/wibononuve/cgj0bXD/zekobapivitinabunate.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
    • http://zuvetimimu.rf.gd/analyzed_by_high_performance_liquid_chromatography.pdfIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/wallpaper_apple_full_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/kenmore_gas_oven_temperature_sensor.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/43337417322.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/certificado_medico_escolar_formato_cdmx.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/billiards_game_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/fobezopewenofe.pdfIn PDF document text
    • http://fatifosavo.rf.gd/bullshits_jobs_livre_francais.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/wd_my_passport_ultra_unable_to_access.pdfIn PDF document text
    • http://muluwokixo.onlinewebshop.net/divegefewepikovetojus.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001029d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029D 5336 bytes
SHA-256: 8e9d6d35deb4a864d0f55ee9322b99b7c18fc57399b254c3e9e347fb10d56479
font_01_sfnt_off00011458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11458 6300 bytes
SHA-256: f4621731e9c2c2c083dcfb72a0c7097a47f8c7d7878b5f2123de2531c532860d
font_02_sfnt_off000123b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123B0 11312 bytes
SHA-256: 68441d2667333958fbee97213cfdf2f42a0aa31ac26f4b1b45549870ccc0c789
font_03_sfnt_off00014a99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A99 16180 bytes
SHA-256: 41a5460697456bf951eb7b701b847d228cd6898181f1c3ebb5fd96512ca86ab0
font_04_sfnt_off00015fb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FB7 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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