Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb90950e3a1784ae…

MALICIOUS

PDF

75.2 KB Created: 2021-03-02 15:05:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 725537a9319c0b68a4c28ccc8f90d877 SHA-1: 30e02dcf02a788035befe1a161e2bf37985f2367 SHA-256: eb90950e3a1784ae650fa801fff96d1a1a192c724ba8aa7c022a7d2bc0412e64
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dafemum.ru/123?utm_term=self+confident+quotes+in+hindi In PDF document text
    • https://lusenivusimutom.weebly.com/uploads/1/3/4/8/134887898/ff1599fe009.pdfIn PDF document text
    • http://vibolofisef.mywebcommunity.org/who_plays_the_little_girl_in_the_game_plan.pdfIn PDF document text
    • https://gazezujebek.weebly.com/uploads/1/3/4/8/134881616/649a9f2c7.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/hdhd3Lz/super_mario_world_secrets_world_1.pdfIn PDF document text
    • https://nurafotupitu.weebly.com/uploads/1/3/4/4/134495453/4978be.pdfIn PDF document text
    • https://resagivet.weebly.com/uploads/1/3/1/3/131383325/pewinigine.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/nuxulikiwab/wedding_album_background_psd.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/31679539625.pdfIn PDF document text
    • http://vejesigivilowen.rf.gd/chipotle_group_order_fax_form.pdfIn PDF document text
    • http://tubaduk.epizy.com/luponuvulabi.pdfIn PDF document text
    • http://ruzojonawa.epizy.com/lufat.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/17419806645.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/kamus_arab_inggris_indonesia.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/guvafijiv.pdfIn PDF document text
    • https://s3.amazonaws.com/jivamubug/polumezalijuxusewusopeb.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_off0000eb94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB94 5032 bytes
SHA-256: 00f2ab1e7bac99658bd563e78c793f61ebfa5f4b0675d7a58b83d758029cf819
font_01_sfnt_off0000fcb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB6 10368 bytes
SHA-256: c3e7c5a394af5bdc5ad2bc34cd24c6ad9304eee76ab68429bc429358727bd70b