Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebdb82a0d3495237…

MALICIOUS

PDF

53.5 KB Created: 2020-10-05 21:06:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 69e1e4880045e2b1633e2ecc19b1ebb5 SHA-1: b94a2348fe964e3d4ee67609a385f5b359e707e7 SHA-256: ebdb82a0d3495237d25521d28632938dbd35e32aebf1590a2f892bc4862cf3cf
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.ru/pify?keyword=california+eviction+defense+manual In PDF document text
    • http://files.sharifmatar.com/uploads/1/3/0/7/130739028/xatevapo.pdfIn PDF document text
    • http://fazikega.mindfulness-rocks.com/uploads/1/3/0/9/130969186/111943e7f04.pdfIn PDF document text
    • http://parenegi.reality-check-approach.com/uploads/1/3/1/0/131071277/werulekoxi.pdfIn PDF document text
    • http://files.awhitehousewedding.com/uploads/1/3/0/7/130775763/rokegutuvemuxuvasa.pdfIn PDF document text
    • http://koxum.aylabirth.org/uploads/1/3/2/8/132815076/ganosaxigaf-xetabegaxuj-vinako-zubiruvomakudi.pdfIn PDF document text
    • http://files.kaginstitute.com/uploads/1/3/0/7/130740255/fudoduwipede_lubetunoti.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3840/7832/files/javascript_f11_full_screen_mode.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1745/3211/files/turnigy_plush_10a_esc_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3604/4183/files/remote_control_sailboat_racing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2796/7395/files/film_studies_a_global_introduction.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88424199-341f-4543-9c11-f4861e31cce4/49822777897.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31b2f8a3-cd41-419f-bdee-6513afb8092f/tuwalapuvumidonavini.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8765 5132 bytes
SHA-256: dec56587ebc5cfe361815a07683a4942bbf4ab4fb2b177bf4523bb68501f0002
font_01_sfnt_off000098cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98CB 10044 bytes
SHA-256: 84965b48486b288f25382079d3cd1444757d535b26b53c6d2e6cb0c8e91dbd5b
font_02_sfnt_off0000bb26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB26 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333