Malicious PDF — malware analysis report

Static analysis result for SHA-256 21255de5d644058d…

MALICIOUS

PDF

76.8 KB Created: 2021-03-04 09:30:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4dfbb7a0cb9dfdc081dbe3419b27aca SHA-1: b6512ee57d6cf190acac54cbac7f4d242c122c8a SHA-256: 21255de5d644058ddfaaadc6fd972bda8e5dda609a8b36e24685a43a69787566
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a malicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though partially corrupted, suggests a lure related to social media evolution, aiming to trick users into visiting the malicious URL.

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://soxebez.ru/wix?keyword=evolucion+de+las+redes+sociales+hasta+la+actualidad
    • http://lifeit.pro/que_significa_la_aparicion_de_moretones_en_el_cuerpouctb9.pdf
    • http://fresh-ita.space/9720857540o0f4k.pdf
    • http://orehi-siberian-force.online/how_much_money_does_binging_with_babish_makeaakc7.pdf
    • http://vsedlyatebya.xyz/childhood_asthma_treatment_guidelinesbyxt0.pdf
    • http://mikazuxo.mypressonline.com/oracle_sql_date_functions_month.pdf
    • http://zaxegod.getenjoyment.net/gujolereneripad.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/dazifozixawus/mixture_word_problems_worksheet.pdf
    • http://pusapovewazigu.onlinewebshop.net/zakolanuvixizewejef.pdf
    • http://fijorolur.myartsonline.com/lukixil.pdf
    • https://s3.amazonaws.com/xapijifas/3d_tuning_hack_mod_apk.pdf
    • https://s3.amazonaws.com/xukonakefules/ozito_petrol_chainsaw_manual.pdf
    • http://kusababi.onlinewebshop.net/manual_de_dibujo_arquitectnico_francis_d._k._ching_gratis.pdf
    • http://vawerudarasikow.myartsonline.com/40972606209.pdf
    • https://s3.amazonaws.com/fedufiporara/54062155811.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e115.bin
6903877a84b951f526ffbd80fbe0f4605f438eafe6caea88e93228c9897da88c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE115 4924 bytes
font_01_sfnt_off0000f1c7.bin
b91b5c5aef755776f6bf1bf6398ff4fe6fd5049e54ce7c35eb9775e734b50b34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C7 11076 bytes
font_02_sfnt_off000115ee.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115EE 4324 bytes

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