Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cc9efbb2390d1a0…

MALICIOUS

PDF

72.0 KB Created: 2021-02-28 22:41:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 04b20de7200cdd512459d919e32bb854 SHA-1: 8302d9bada12609728f097ece22c32467ededbeb SHA-256: 3cc9efbb2390d1a0b0902007bc0c430334090eab994690eccb6e14ebd4cc57f9
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://xezojetit.ru/award?keyword=fundamentos+basicos+del+voleibol+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378848/normal_5fdbc5361227e.pdfIn PDF document text
    • http://creditscorecard.info/how_to_calculate_gpa_on_infinite_campusi9fxj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489975/normal_5fff1a83e4767.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420449/normal_5fdb59f4a0722.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426060/normal_5ffeb7da8a915.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wezebiwudure.epizy.com/project_issue_tracker_excel_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/reproduccion_en_plantas_angiospermas.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/71531865635.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/balancing_chemical_equations_practice_worksheet_answer_key.pdfIn PDF document text
    • http://pujifobekef.epizy.com/98304161776.pdfIn PDF document text
    • http://tirawuko.rf.gd/ps4_gold_headset_app_pc.pdfIn PDF document text
    • http://pefafimu.rf.gd/69044763898.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/bosamudofume.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/world_map_black_and_white_with_country_names.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/blue_coat_academy_uniform.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_off0000db37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB37 5360 bytes
SHA-256: 522d05c1fda25258c2c6e262226b9ab2797e9b363f5095090764b9007f37e064
font_01_sfnt_off0000ed6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6C 11284 bytes
SHA-256: 8f561f8fa82afd5695c1e1a899f8ab0df67b802d9b542186e36448bdc674f8e1