Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a644c9094c9cceb…

MALICIOUS

PDF

76.6 KB Created: 2021-03-11 17:16:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: adfabb9f6cde86c2d67c9e20652599b3 SHA-1: 3133756fc13a3483bbf4be203511818660028787 SHA-256: 1a644c9094c9cceb2faee18ffa5cad8cfd30e24567cbbcae0665dd12c78b3dc8
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://soxebez.ru/wix?keyword=drosophila+virtual+lab+answers PDF link annotation
    • https://cdn.sqhk.co/lisupixiwe/jbjjbRe/67982100235.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465685/normal_6023ee6377f44.pdfIn PDF document text
    • http://bovosidifusu.iblogger.org/physiology_of_blood_circulation.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417992/normal_5fd071fd0b7f1.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/tiijigh/steamship_authority_schedule_mobile.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457847/normal_5fce34c4c877b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501367/normal_60313b6a55173.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/janodojivi/mikitawafikeketuzotiseme.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/lajir.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/50913104927.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/artritis_reumatoide_en_ingles.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/katibufuzexoximuxajitenu.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/all_songs_telugu_audio.pdfIn PDF document text
    • http://pupogoxegaze.rf.gd/school_uniforms_should_be_banned_argumentative_essay.pdfIn PDF document text
    • http://sifirajudexotiz.epizy.com/82415839692.pdfIn PDF document text
    • https://s3.amazonaws.com/mevuzokekenojab/ver_el_pequeo_vampiro_2017_online_castellano.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/dalijuparexisulewavofina.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/87087772422.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
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC7A 6744 bytes
SHA-256: 0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63
font_01_sfnt_off0000ed61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED61 5196 bytes
SHA-256: 73dddc488e29ee6b32e775cb4c55d476f84c19e59290674d04c41bd982506255
font_02_sfnt_off0000ff1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1B 10704 bytes
SHA-256: 47a8104a8c29eb9a12ea91ee7e135b1ae44824bdffb3fef6c73fec314be5a08d

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