Malicious PDF — malware analysis report

Static analysis result for SHA-256 a55ada9657319d5a…

MALICIOUS

PDF

65.3 KB Created: 2021-02-11 23:08:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 14c52df5c8ccf310b935d624a83e83f2 SHA-1: ae9cd1a5fff710b4d4952971bc426d554d2f1610 SHA-256: a55ada9657319d5ab7d34d0cb90c53373ac59f8b56859f16d2c9dd0a6d4bd741
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://jottigo.ru/wix?keyword=pokemon+sinnoh+handbook+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408324/normal_5fc78f5a3b54e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448328/normal_6013140f2846b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501042/normal_600493d69d8dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419851/normal_60159bea7cff5.pdfIn PDF document text
    • https://cdn.sqhk.co/vovewotutal/jjePO2S/sword_3d_wallpaper.pdfIn PDF document text
    • https://cdn.sqhk.co/pifonode/zdPifhd/linkedin_sales_navigator_login.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/jevelel/78568208177.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/30007013356.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/gixukobasag.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/surviving_the_dust_bowl_video_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/xinusojokagomudo.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/abbyy_free_trial.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/bseb_matric_result_2010_marksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/bonus_form_d_format_in_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/plastic_sheet_extrusion_process.pdfIn PDF document text
    • https://s3.amazonaws.com/gopifu/real_gangster_game_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/fedodolenotevoxopuwulokuv.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_off0000c37e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC37E 5356 bytes
SHA-256: 6aa45f781b20bf5b30e82a904d68f79ec9db873d6451e75df60b13e8e7ffc765
font_01_sfnt_off0000d592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD592 10264 bytes
SHA-256: 3cbf214305aed5da0f880ffa4f55cc8bc895e2fc2e08bf06648bcc4902fc37d1