Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7d495b92a386ce7…

MALICIOUS

PDF

107.7 KB Created: 2021-02-16 02:35:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 84cd3ecc67c9c01d5e58928c7e38d210 SHA-1: a72e54eada097179b2b2e37aecf1db6c13b2d38f SHA-256: b7d495b92a386ce727f881c251234f1975a503d64ec902a9de3eb2bb13ecac51
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URL that leads to a suspicious domain, likely serving as a lure for users. The document body, though heavily obfuscated, appears to contain text related to 'Edipo rey autor sofocles resumen', suggesting a pretext for 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://bologen.ru/strik?utm_term=edipo+rey+autor+sofocles+resumen PDF link annotation
    • http://genoray.pro/amigaos_4._1_final_edition_update_1dv1mi.pdfIn PDF document text
    • http://itdiscount.info/anglo_boer_warv1dk6.pdfIn PDF document text
    • http://siankaanmexico.com/16275675955m1srb.pdfIn PDF document text
    • http://batmbatm.ru/ts_hall_ticket_2019_sscvsw0k.pdfIn PDF document text
    • http://termometr-medikal.site/diy_hocus_pocus_spell_book_dollar_treewf594.pdfIn PDF document text
    • http://future-techno.ru/88025494373p2xs3.pdfIn PDF document text
    • http://levelupguild.com/23416253145qn558.pdfIn PDF document text
    • http://nosinoski.shop/dagigarijo992mf.pdfIn PDF document text
    • http://vash-komfort5.ru/bihar_police_syllabus_2017va8j6.pdfIn PDF document text
    • http://babubusawase.22web.org/pededizaladedoxixijebelo.pdfIn PDF document text
    • http://present-mag.ru/83208809841kbomn.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/tosevud/amoveo_mining_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/gojulifipetafojuledijanun.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/70477854429.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/92306874809.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/blessed_be_the_lord_god_almighty.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/relaxing_disney_piano_sheet_music.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_off00016061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16061 5360 bytes
SHA-256: 9cb181ba4e4e56d9e5f1fc49e02fb46f16921f8c717af519dccfe23dd13624d6
font_01_sfnt_off00017299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17299 14056 bytes
SHA-256: 1191f3ab8489388eeb773ce8a02aaf30a3a944454e6b1b39eeeb2875d27d6e5c

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