Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ed4e791b2a8691e…

MALICIOUS

PDF

37.5 KB Created: 2020-10-08 07:15:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4aab2ad44b4ef184aa022e82c5be079e SHA-1: 8d63a5dcc227d70a2e31ca179c99aebe596c952e SHA-256: 7ed4e791b2a8691e05812400bb784163814b2074bbec8a72138ed700c9b1947a
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://gettraff.ru/strik?keyword=ejercicios+resueltos+ley+de+snell+fisica In PDF document text
    • http://xagidepe.austinburgfirstucc.org/uploads/1/3/0/8/130874161/dafowuneza.pdfIn PDF document text
    • http://files.iamme.studio/uploads/1/3/1/0/131070845/jenudebawoxedul.pdfIn PDF document text
    • http://files.integritybm.com.au/uploads/1/3/1/4/131437924/pixobunuxipex.pdfIn PDF document text
    • http://files.georgeayee.com/uploads/1/3/1/3/131398195/dulofewedol-wutivepekatedi-saliwagoxoraz-wipuribamasada.pdfIn PDF document text
    • http://files.wildfernlodge.com/uploads/1/3/0/7/130739099/7f1dd.pdfIn PDF document text
    • https://site-1037890.mozfiles.com/files/1037890/99843202283.pdfIn PDF document text
    • https://site-1041284.mozfiles.com/files/1041284/17996483344.pdfIn PDF document text
    • https://site-1038779.mozfiles.com/files/1038779/lozuvakudixukof.pdfIn PDF document text
    • https://site-1036969.mozfiles.com/files/1036969/giganavete.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/1/0430/8716/7637/files/befoserasuluzusilofu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0392/6952/files/asignaturas_programadas_uis_2019-1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8433/6283/files/haier_wine_fridge_repair.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1452/6872/files/67056551733.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8954/9729/files/starbucks_business_model_canvas.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_off000050de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50DE 5148 bytes
SHA-256: 59c8ef7e3bf196d2c20e351bf2fa55a596eaf84ac81597037385545df735b07d
font_01_sfnt_off00006282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6282 11400 bytes
SHA-256: 815abd52712984774a774a4e6cba5a0e1c9af6d540d9db6ae9fcc6d1878e6933

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