Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1f4d9338460b73f…

MALICIOUS

PDF

68.9 KB Created: 2021-02-10 11:07:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 0d6a3d615da79ecd3d92223ca32d8a31 SHA-1: f5c95e8cb6dc84dcb0cf8411f59b49c85255a19d SHA-256: d1f4d9338460b73f39b88e5f38aa65195c7d4204bd3444bc2c6e50cb59cef460
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://leonvi.ru/123?utm_term=wrox+professional+asp.net+mvc+4+pdf+free+download PDF link annotation
    • https://fimudelowuj.weebly.com/uploads/1/3/1/4/131455024/9014341.pdfIn PDF document text
    • http://vinnipoh.space/joel_harper_miami_universityj8ose.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445558/normal_5fc6a76c1ddaf.pdfIn PDF document text
    • https://cdn.sqhk.co/posukomokufi/hiVgIij/word_search_solver_app.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452835/normal_5fff6cf7a6524.pdfIn PDF document text
    • https://cdn.sqhk.co/loberutebe/AMhiQjc/pancake_recipes_to_freeze.pdfIn PDF document text
    • https://cdn.sqhk.co/vaxarogajib/HiSLheY/34620722255.pdfIn PDF document text
    • https://batigagonu.weebly.com/uploads/1/3/4/7/134774980/8940323.pdfIn PDF document text
    • https://cdn.sqhk.co/rotuzuwibi/auVMmlN/best_breakfast_before_morning_soccer_game.pdfIn PDF document text
    • https://zubikazosiz.weebly.com/uploads/1/3/4/7/134761183/9750005.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/lomiwexuva/hillsong_worship_songs_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/dahao_emcad_embroidery_pattern-_design_system.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/bluestacks_1_for_windows_7_softonic.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/40885014819.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/85900926017.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_off0000cf7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF7E 5656 bytes
SHA-256: c0e8f3d0a9b0a1f59b20339e50f4e0bf183a728f9fa3ed98e578368d65b06a4d
font_01_sfnt_off0000e2c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C9 10344 bytes
SHA-256: a7edaa59917fa683ea2b432f35a2ded53556e742f56c75b14f67d11c1524f48e