Malicious PDF — malware analysis report

Static analysis result for SHA-256 f89b189e79c4dc03…

MALICIOUS

PDF

38.0 KB Created: 2020-10-31 13:58:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 560bc82512510f6a2061f5119c523188 SHA-1: 9d150e57c654570f8dc597afe1f9f1d4ecb22974 SHA-256: f89b189e79c4dc030b3ffbcedb8e166458b8a4bc6397ad6324374017139550ad
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ttraff.club/123?keyword=division+of+polynomials+by+monomials+worksheet+answers In PDF document text
    • https://gasomuvujutomeb.weebly.com/uploads/1/3/4/3/134356107/vidofekoleroge.pdfIn PDF document text
    • https://talapilodegopez.weebly.com/uploads/1/3/0/9/130969507/a28e7d.pdfIn PDF document text
    • https://kawuloxegulul.weebly.com/uploads/1/3/4/3/134389306/fadojisidejo.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/jenefemafawal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3381ab0c-afcc-4a4e-bbb7-5351ea9deb43/96391084192.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/6162/3963/files/install_android_for_iphone_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7751/5941/files/20395026551.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/47549857276.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/ninusolazafewexe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/150cb960-3e66-4702-995b-be9807f32141/nazi_zombie_army_pc_game_download.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_off000054dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54DC 5596 bytes
SHA-256: ffdf222ce80b767ef114c96e6a77afdeb651775ece1b5fdfff8d8ea4420da5b3
font_01_sfnt_off000067d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67D5 10272 bytes
SHA-256: 0900b9df5bf962ac47b21d1fbec948fb9d0935c45561ac25d7739257bac5662e

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