Malicious PDF — malware analysis report

Static analysis result for SHA-256 97448896c0e39abb…

MALICIOUS

PDF

75.2 KB Created: 2021-03-01 08:50:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddd2f2c01712558b710082d545fc25c9 SHA-1: 1dac5de271209e0a44b91a748add164628648d71 SHA-256: 97448896c0e39abb7028d31d8996c1301422d991c4c769dd57ad4baeff20c47d
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL that, when clicked, likely leads to a malicious site. The document body, though heavily obfuscated, suggests a lure related to educational materials to entice users to interact with the malicious link.

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://zajinet.ru/strik?utm_term=fountas+and+pinnell+guided+reading+grade+level+chart
    • http://yyyyyyhhhhh.space/kukeladekibalaxevzx76.pdf
    • http://tvoeobrazovanie.fun/diccionario_latin_espaol_porruanvq45.pdf
    • http://wupuluku.22web.org/29793098265.pdf
    • http://zathkatow.xyz/fipoxiparikiid0c8.pdf
    • http://reassurez-moi-fr.info/historia_do_brasil_livro_boris_fauston3yre.pdf
    • http://vumekakemimux.iblogger.org/back_to_me_daya_sheet_music.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sobikunukozi.rf.gd/gerivabob.pdf
    • http://batitesejikak.epizy.com/nezokavigelegiririg.pdf
    • http://sofibimibojas.myartsonline.com/iso_27001_costs.pdf
    • https://s3.amazonaws.com/dinigugaxej/xifamiwudapepe.pdf
    • http://muxobuduxude.epizy.com/will_solace_from_percy_jackson.pdf
    • https://s3.amazonaws.com/pavujiniz/kobebidewiwosutax.pdf
    • http://kebowikosu.epizy.com/3935142299.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e76e.bin
c690faf3d7b852dc63b439c9b27c2963a69d01c908ee077e7a2e758729cf6cf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE76E 5352 bytes
font_01_sfnt_off0000f9a4.bin
e2950f4c5d2b23c4aa8298f8269fd76606429c479509a3ed40c2335bf75bd8ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A4 11160 bytes

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