Malicious PDF — malware analysis report

Static analysis result for SHA-256 db9c7714d75a30ff…

MALICIOUS

PDF

74.3 KB Created: 2021-02-05 14:12:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5be0da16c403d674e13f08dc4c5eb25b SHA-1: c2fdb1e913506407f727d43394f918e0098d869d SHA-256: db9c7714d75a30ffce476e3c58f38c4740ef5e55cf9399d680dff2f87a4726e6
96 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'seumenha.ru', which is likely part of a phishing or malware distribution scheme. The document body is heavily obfuscated, but the presence of the malicious URL and the high confidence verdict strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=spanish+for+brown+sugar PDF link annotation
    • https://cdn.sqhk.co/wopidevepip/48eCjdD/online_compiler_python_3._7.pdfIn PDF document text
    • http://ideaita.fun/welch_allyn_braun_thermoscan_pro_6000_ear_thermometer_manualcobgz.pdfIn PDF document text
    • https://cdn.sqhk.co/romilononove/6Sjchf8/bear_pop_bubble_shooter_game.pdfIn PDF document text
    • https://cdn.sqhk.co/jokawefezo/fSheuhh/bricknoid_brick_breaker_game.pdfIn PDF document text
    • https://cdn.sqhk.co/sobexofap/E8gghig/my_singing_monsters_composer_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/xujanezujol/ieWcumW/kogama_war_4_oculus.pdfIn PDF document text
    • http://specialsale.info/602639647672ujpu.pdfIn PDF document text
    • http://womans30planet.com/motorola_gallery_apk_uptodownwyrxv.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/eW7hbgc/civil_war_battlefields_in_kentucky_map.pdfIn PDF document text
    • https://cdn.sqhk.co/narulaloro/TzVpDe5/fluxx_hoverboard_charger_amazon.pdfIn PDF document text
    • http://shoop-fh.ru/division_worksheet_year_3_twinklup56d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://riremeg.rf.gd/a._n._m_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/bug_bounty_hunting_essentials_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/97733447894.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/thankful_josh_groban_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/deutsche_bahn_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/marketing_plan_template_nz.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/restriction_orifice_datasheet.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BA 5464 bytes
SHA-256: ec2c3477d5b02ff02847efeba93229544bd1cf40a5a643c727d76f0706525f94
font_01_sfnt_off0000f860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF860 10592 bytes
SHA-256: 29ffa026ced0d55cd1913fe68dfff4af835f188a5dd4502da54fef33f1d68cdd

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