Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ebd6c30e496f2dd…

MALICIOUS

PDF

57.7 KB Created: 2020-08-26 03:04:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 90fb2dd81fc8425caabc34f1a72a0c41 SHA-1: a964b60d744cb77686fc831d2f97423f3ab483a2 SHA-256: 5ebd6c30e496f2ddf78ba1ae2838cd3a39ed9897ce69d885ac016917771ee676
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • 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.cc/pify?keyword=momentum+elastic+and+inelastic+collisions+worksheet In PDF document text
    • http://files.prairieskycreations.ca/uploads/1/3/1/4/131406149/nekexuzobaloj_kazozijeges.pdfIn PDF document text
    • http://files.3ganfantasyfootball.com/uploads/1/3/0/7/130739987/8485553.pdfIn PDF document text
    • http://bopusa.beautyforashesrwanda.com/uploads/1/3/0/7/130738720/lopigufa-nemuvirigoxi-desituvot-pobulejur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0196/9820/files/tegepowilobezef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3403/9704/files/93097617417.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0538/6657/files/28965480413.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8999/1582/files/15755785955.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5421/0980/files/play_script_template_pages.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0660/7012/files/muvubalaje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3718/7493/files/50839678642.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0123/2035/files/guxoralipiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0692/5720/files/avi_player_for_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5543/2348/files/86585147887.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6296/8991/files/3rd_grade_math_placement_test.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E94 5340 bytes
SHA-256: 51058570c4df715187094d142e7f86ee37a3094e58f4f9846f137c35a28072ac
font_01_sfnt_off000090a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90A4 16060 bytes
SHA-256: 8087e24f76e8d71dfc85bd49b7c19f2e8d1ea58ae6cf404da5d420d2053fcf2d
font_02_sfnt_off0000c3f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3F4 16180 bytes
SHA-256: 1686e3eba2f37e0f72cd7e5d489597104a7ece513dc01f219e4ecf9450d5e0ce

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