Malicious PDF — malware analysis report

Static analysis result for SHA-256 79903e6c63808b2b…

MALICIOUS

PDF

45.2 KB Created: 2020-10-02 14:11:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 5116a59d4bfdc4bbecbf873b3f162a33 SHA-1: f39faed2231b0d93859243fd16aa990269f89d94 SHA-256: 79903e6c63808b2bee271ae4b6bc383f4d5d57fa99e13a2fac9fcbb645fe067d
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/strik?keyword=root+samsung+gt-n8013 In PDF document text
    • https://site-1040282.mozfiles.com/files/1040282/furaxinokuwixogu.pdfIn PDF document text
    • https://site-1039198.mozfiles.com/files/1039198/laxasorimovepefokume.pdfIn PDF document text
    • https://site-1037860.mozfiles.com/files/1037860/gawepirexisizut.pdfIn PDF document text
    • https://site-1037840.mozfiles.com/files/1037840/36737973404.pdfIn PDF document text
    • http://files.jlongkandb.co.uk/uploads/1/3/1/6/131606368/da1337258866eff.pdfIn PDF document text
    • http://files.sumikoshimada.com/uploads/1/3/2/6/132682989/e2f26fcf505db4.pdfIn PDF document text
    • http://files.thebalancingpath.com/uploads/1/3/0/7/130776343/1203035.pdfIn PDF document text
    • https://site-1036923.mozfiles.com/files/1036923/78774609471.pdfIn PDF document text
    • https://site-1037219.mozfiles.com/files/1037219/wevafad.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/1/0431/2858/6402/files/zoxej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9030/3393/files/used_tanning_beds_for_sale_in_michigan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/1146/9220/files/midnight_blue_hair_color.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9526/1333/files/military_ball_pictures_2017.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_off000063af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63AF 5184 bytes
SHA-256: 46e17c92d06d0db54ee7658d30f39124fddf0c54fadbd95aff86f4e60397a02a
font_01_sfnt_off0000753a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x753A 10764 bytes
SHA-256: b8100f9f8cba297f299b77154688af179f4b91901f1bcb014be10e020d72beae
font_02_sfnt_off00009a33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A33 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f