Malicious PDF — malware analysis report

Static analysis result for SHA-256 e33e681f91287685…

MALICIOUS

PDF

59.1 KB Created: 2020-10-15 22:11:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8dc7ae2f33a89f272acbb6d5722b1d38 SHA-1: e59b7d217f3eca20013e73eb8dd1b3586c4b2dc8 SHA-256: e33e681f91287685566e8657dcb074253286ac8e70b217425824dca09f77bf30
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://cctraff.ru/123?keyword=arterial+hypertension+guidelines+esc+2020 In PDF document text
    • https://site-1042938.mozfiles.com/files/1042938/76883265519.pdfIn PDF document text
    • https://site-1037222.mozfiles.com/files/1037222/gononediwulurulugilakoniw.pdfIn PDF document text
    • https://site-1040210.mozfiles.com/files/1040210/51279700155.pdfIn PDF document text
    • https://site-1036644.mozfiles.com/files/1036644/21897309902.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/kinufijozulof.pdfIn PDF document text
    • https://ridolagu.weebly.com/uploads/1/3/0/7/130775195/5074999.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/nojof.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/lexenumijosowemakaz.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/daxurugut.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/7304884.pdfIn PDF document text
    • https://genamimiwovem.weebly.com/uploads/1/3/1/6/131636881/8163428.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/juxeza.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/1/0428/1348/9318/files/micro_macro_mezzo_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4659/1903/files/coolidge_middle_school_new_girl.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2440/7961/files/multi_user_operating_system_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9936/3764/files/sms_marketing_plan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5767/5431/files/kidate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9893/8274/files/line_segment_ray_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/2274/6263/files/77299240762.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9944/5664/files/map_of_all_spanish_speaking_countries.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3448/3615/files/the_ants_go_marching_lyrics_cocomelon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3841/1422/files/whittier_village_cinemas_showtimes_today.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_off00009e30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E30 5700 bytes
SHA-256: 2974fab2672210fe5117400ac069e19a1d74e894691edcf11e1ce588b2cab7da
font_01_sfnt_off0000b195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB195 14508 bytes
SHA-256: 0651c96127dd4d09fa27a504e1ab462b14740cc260bcc302390037edf9ce52de

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