Malicious PDF — malware analysis report

Static analysis result for SHA-256 54c0543ca4cb9a48…

MALICIOUS

PDF

78.0 KB Created: 2021-02-23 08:00:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8e1402f618d7054aba486f9a7debb54f SHA-1: ee462e604f1c7cdb227587b478c10a6437b41ad3 SHA-256: 54c0543ca4cb9a48c79ce3cda421af3d854ea418a62ad37cff07339714eb961e
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, flagged by heuristics and ClamAV as a phishing/malicious PDF. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated, but the presence of external URIs suggests an attempt to redirect the user to a malicious site for further compromise, likely via spearphishing.

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://maypoin.ru/strik?utm_term=sole+e25+vs+e35+reddit PDF link annotation
    • https://cdn.sqhk.co/vamunidibu/xZ86jcT/toppr_plus_hack.pdfIn PDF document text
    • http://front-glass.space/jerebevogakivatadofafuwaxi1tor.pdfIn PDF document text
    • http://iciko.xyz/73480575392k8qai.pdfIn PDF document text
    • https://cdn.sqhk.co/xubewarow/1gjazW7/trap_adventure_2_pc_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxokakijefe/hjhdvia/the_wolf_of_snow_hollow_dvd_release_date.pdfIn PDF document text
    • https://cdn.sqhk.co/fefamuve/gjOgcjh/70373536659.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzezajolu/igghhbI/wizuwamatifaluwatuvibeda.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/xezujuxoz/income_guidelines_for_ebt_in_iowa.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/analisis_del_lazarillo_de_tormes_tratado_1.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/vanebotufokigelafijibuzo.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/wotogileboz.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/atriplex_canescens.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/evaluating_inverse_trigonometric_functions_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/xewisijizijibog.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/sony_bravia_4k_hdr_android_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/jitisa.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/woocommerce_one_page_checkout_plugin_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/pelesewasedaresaraxomelad.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_off0000f64a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64A 5192 bytes
SHA-256: b89a8b6cb535eff16e860ee819ea2fa02ca4dcbbcf2cd4ada94438ab4988cd97
font_01_sfnt_off0001080e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1080E 10368 bytes
SHA-256: dc6cd26d59b6bb12c7f95d0434d2777d44846159b1baf02cab105a68af726078

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