Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f62d82d35fa6960…

MALICIOUS

PDF

45.5 KB Created: 2020-11-02 06:06:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 43805255226c8aada5621fce26775191 SHA-1: a52f0bc4dbc634b8a5a488324caf5965d70f2ce2 SHA-256: 5f62d82d35fa6960e0ad8748cf7e76fe5ba04a98d4a77b13e5d3b95db8b25709
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.me/123?keyword=burndy+hypress+y35+repair+manual In PDF document text
    • https://zoxamadafipezo.weebly.com/uploads/1/3/1/1/131164297/314fbbee6.pdfIn PDF document text
    • https://zififawatef.weebly.com/uploads/1/3/4/3/134384507/nejutev.pdfIn PDF document text
    • https://folemazilepi.weebly.com/uploads/1/3/1/1/131164248/bikabobej_venutus_binokitel_mudejezepoju.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/sefaritonos-nukivafeka-retisebop-regaxumex.pdfIn PDF document text
    • https://josugonu.weebly.com/uploads/1/3/4/4/134488469/xulekuwawisizexenoji.pdfIn PDF document text
    • https://mixorone.weebly.com/uploads/1/3/1/4/131438240/modagosup-rovutebufedo-remoxu.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/wutezigojuxi/zusimiwaru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8409/3884/files/bus_game_download_apk_app.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/7813/0096/files/special_education_paraprofessional_aide_job_description.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/28455513512.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/varitutipidubos.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/is_code_for_rcc_design.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/ansi_150_rf_flange_dimensions.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_off00006e1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E1F 5636 bytes
SHA-256: 982e8d648e6514f06cfde6fab19186e3906e2029758bc611e28650705da96196
font_01_sfnt_off00008128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8128 11672 bytes
SHA-256: 434311c5dabb7e35c5fd3297905df37c036fc02a730df4410cc5bb20c6ccac20