Malicious PDF — malware analysis report

Static analysis result for SHA-256 63927a542c178b51…

MALICIOUS

PDF

74.5 KB Created: 2021-04-01 01:39:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c0af9267712e83dbae18cdf49711818f SHA-1: 6de08a9e16d9c1e6d04ad79bced1b4fd0f0810cc SHA-256: 63927a542c178b518d74899e01c6bbf0757a703c38fd970f1cacb4899d86a872
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary external links, 'https://mezovuduw.ru/award?keyword=natural+benefits+of+urine+therapy+pdf', suggests a lure for SEO manipulation or potentially malicious content hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://mezovuduw.ru/award?keyword=natural+benefits+of+urine+therapy+pdf PDF link annotation
    • https://cdn.sqhk.co/fugovigul/djblxgg/steel_cable_cutting_machine.pdfIn PDF document text
    • http://zobavomafiv.iblogger.org/53885672418.pdfIn PDF document text
    • http://dadumuxuwu.iblogger.org/procesos_mentales_psicologia.pdfIn PDF document text
    • https://cdn.sqhk.co/pulovafafita/p7ihjsA/hit_or_miss_archery_nm.pdfIn PDF document text
    • http://debugor.iblogger.org/fizafafulekobifugisux.pdfIn PDF document text
    • https://cdn.sqhk.co/bitomasijelo/ijcjfha/need_for_racing_fever_mod_apk.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/gezizefefififa/reset_transfer_belt_samsung_c460.pdfIn PDF document text
    • https://86042ffc-9b62-460b-8552-fb2522205a17.filesusr.com/ugd/4f92c1_48f03a2543744d4eacdc11e6b0572589.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sajezife/9485345501.pdfIn PDF document text
    • http://jovosaf.epizy.com/telecharger_journal_ennahar.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/rabazakinisimuvido.pdfIn PDF document text
    • http://tedijafubivot.epizy.com/angel_olsen_all_mirrors.pdfIn PDF document text
    • https://933afb0c-60ca-4ff4-ba38-e7c804ca925d.filesusr.com/ugd/941881_a53d439c59794de1bfd39ddbb3b4d9ad.pdf?index=trueIn PDF document text
    • https://34e223d5-b18a-4f89-96b3-7c58aa965d90.filesusr.com/ugd/440e29_ace8f3a6a836415aa9e91edf79eb84e4.pdf?index=trueIn PDF document text
    • http://voxewasasaziro.rf.gd/fevunulujafofu.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/gikazukik.pdfIn PDF document text
    • http://lutaretubonen.rf.gd/best_android_rpg_games.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/36967277835.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_off0000e6c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C9 5340 bytes
SHA-256: 0dadf81d68049b45e92db156758eeb9b4fc70399c44cb55b9afdc30b69002772
font_01_sfnt_off0000f8f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F1 10604 bytes
SHA-256: cdd4f24607f85949a205ce04d6b294d3c0d58c3f295c8ee97bde17d00f50d17f

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