Malicious PDF — malware analysis report

Static analysis result for SHA-256 619941d3c0739faa…

MALICIOUS

PDF

82.8 KB Created: 2021-03-11 07:49:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab5dd92ad0a31789a8425059a559e9b1 SHA-1: 9c435631086000955da0c529143cf5bcc72e47bb SHA-256: 619941d3c0739faa5fbccf0cf5edd57393118f4ca00d0e723acb58d50a6216cb
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, and contains an external URI pointing to a suspicious domain. The document body, though heavily obfuscated, suggests a lure related to educational worksheets. The presence of embedded URLs indicates an attempt to redirect the user to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://zajinet.ru/123?utm_term=dolch+sight+word+worksheet+generator
    • https://cdn.sqhk.co/fujotojaxob/hhhchgk/lagojubavefo.pdf
    • https://cdn.sqhk.co/xobitabab/hcuihhg/cissp_domains.pdf
    • https://cdn.sqhk.co/golomamone/kyjciak/bewizilipisikeme.pdf
    • http://skidki-day.store/singapore_math_worksheets_grade_10mw1kf.pdf
    • https://cdn-cms.f-static.net/uploads/4484380/normal_600a5dfd8122f.pdf
    • http://plusstore.pro/91097312537qy4gn.pdf
    • http://xbet1.fun/83375967013sslwv.pdf
    • http://digitalmedialit.com/3478988860202f6u.pdf
    • https://cdn-cms.f-static.net/uploads/4424982/normal_603d20377c098.pdf
    • https://cdn.sqhk.co/jotenitix/hhhQTno/swimming_racing_goggles_review.pdf
    • http://lolkek.xyz/videwuv1v5.pdf
    • https://static.s123-cdn-static.com/uploads/4380076/normal_5fc978b59e2f0.pdf
    • https://cdn.sqhk.co/vuveleni/haOZ3ic/pen_name_generator_quiz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sugitis.rf.gd/how_to_say_de_donde_eres_in_english.pdf
    • https://s3.amazonaws.com/wipotegadodorek/60378804633.pdf
    • http://joxelexudar.epizy.com/rotulumoxikukewil.pdf
    • http://dukedofabi.epizy.com/44712331048.pdf
    • https://s3.amazonaws.com/lemefofutomapox/93014075755.pdf
    • http://xoponupesede.epizy.com/filmywap_movie_2019_kabir_singh.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e087.bin
4814e487c56f39c4d6d00cc90d708d1715e8864f7289945c9f8f8777cd572d6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE087 5356 bytes
font_01_sfnt_off0000f2c3.bin
3791ee834aaefd82420679f6d1c58ab3636af64d8574ebf94660712f3d8d01fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C3 4088 bytes
font_02_sfnt_off00010252.bin
58a25f2bb6f58112640b5e71cef0302c55c59849f3cc9ffbbcf41a1a4e837534		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10252 10764 bytes
font_03_sfnt_off00012753.bin
aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12753 16312 bytes

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