Malicious PDF — malware analysis report

Static analysis result for SHA-256 48038acc9ae7a0b5…

MALICIOUS

PDF

36.2 KB Created: 2020-10-02 05:08:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 459f311802f715710c4972fdb0bde06e SHA-1: e78b4a6248a88a6e170f93873905ab7eb10310b4 SHA-256: 48038acc9ae7a0b56e693a86f2f3a3ee5022388f470973465071686c64be20df
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://cctraff.ru/pify?keyword=fahrenheit+451+worksheet+answers In PDF document text
    • https://site-1036962.mozfiles.com/files/1036962/17083641754.pdfIn PDF document text
    • https://site-1039423.mozfiles.com/files/1039423/fivudipifobuf.pdfIn PDF document text
    • https://site-1036753.mozfiles.com/files/1036753/25488981267.pdfIn PDF document text
    • http://wexemizef.lilyhock.com/uploads/1/3/1/0/131071164/xufubuvir_zekiginatug_duwukufidonat_mokejegusi.pdfIn PDF document text
    • http://files.lawqms.com/uploads/1/3/1/1/131163932/8981457.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/1/0437/9400/6177/files/how_to_unlock_rex_goodwin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0469/4612/3937/files/6536166051.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4398/1978/files/hail_to_the_chief.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9236/8796/files/women_who_love_too_much.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9357/3288/files/tension_rod_shower_caddy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1777/0920/files/school_counselor_personal_mission_statement_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/1062/1341/files/1070_ti_vs_1080.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_off00005111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5111 5116 bytes
SHA-256: f3767a25551f99e75e41aef9dd5e5a279d3456dadd76e4d10cc0f44be97762eb
font_01_sfnt_off00006296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6296 9868 bytes
SHA-256: 92d1027d7fc0e0e6d486b8c7b0636394bc0e923cd65b01a9eeee43f353a2fa59