Malicious PDF — malware analysis report

Static analysis result for SHA-256 505b6f8ce41b4a5b…

MALICIOUS

PDF

79.9 KB Created: 2021-05-20 23:44:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b23c667699fc1ab95e8772b7a41b4228 SHA-1: 06938a501a8724b95360fcd0281859083029a813 SHA-256: 505b6f8ce41b4a5becebb32c42d5d12a5f104bb233c5f41a912a87cdb4fcf6d1
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a URL that is flagged as malicious and associated with phishing. The document body, though heavily obfuscated, appears to be related to a game bonus code, suggesting a social engineering lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

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=carx+drift+racing+bonus+code+instagram PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4407983/normal_5ff291d9aabea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493881/normal_603c4ca555a9e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481820/normal_5ff251e03da16.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454045/normal_5ff7640431675.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/divelatoxa/bhagavad_gita_chapter_2_meaning_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/funabivuberare.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/jomakusujoteguwujekorese.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/exclusive_sales_agency_agreement_form.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/givironapel.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/14601390166.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/crystal_defenders_trophy_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/52806671748.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7f72724-41db-4cdb-a228-fb5faf3a968c/66756468188.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/76041793709.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/business_model_canvas_template_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58342cf8-6e49-461b-b05c-53e85920b901/59212178273.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ff36998-3d67-4394-8937-30dfdbc3b4db/why_is_smoke_detector_still_chirping_after_battery_change.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/dell_precision_tower_3620_specs_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/asp.net_mvc_selectlist_set_selected_value.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_off0000f978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF978 5420 bytes
SHA-256: d6b46aca55f00aebdc9862dcf63ba9f47040459fc311ba73d2178d3da867ac66
font_01_sfnt_off00010bdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDB 10768 bytes
SHA-256: f926c08f6509d2c7656de61bf17f654293eca43562c6b24be8239834b7e7bca4

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