Malicious PDF — malware analysis report

Static analysis result for SHA-256 06921b00a8c6c177…

MALICIOUS

PDF

69.6 KB Created: 2020-10-11 09:16:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 3943b64538e3460fe94beea39269045f SHA-1: 67764a82a29668025898118aafd07b25d55d4505 SHA-256: 06921b00a8c6c177058e90f6837901ea47a734337eb55aeb5d22f4182e24d783
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://ggtraff.ru/strik?keyword=steven+universe+latino+temporada+6 In PDF document text
    • http://files.pennumc.org/uploads/1/3/1/8/131871614/f2c4ed1ac95.pdfIn PDF document text
    • http://zevoz.morethanagypsytendency.com/uploads/1/3/1/1/131163635/ludanibivaloso.pdfIn PDF document text
    • http://rigeze.sthlmtapas.se/uploads/1/3/2/7/132740478/4154216.pdfIn PDF document text
    • https://site-1042627.mozfiles.com/files/1042627/30005278878.pdfIn PDF document text
    • https://site-1041501.mozfiles.com/files/1041501/30689440692.pdfIn PDF document text
    • https://site-1038702.mozfiles.com/files/1038702/wafedepedopekewe.pdfIn PDF document text
    • https://site-1039922.mozfiles.com/files/1039922/daxivekanoje.pdfIn PDF document text
    • https://site-1043032.mozfiles.com/files/1043032/59132226585.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/1/0493/1177/6927/files/hansel_and_gretel_witch_hunters_2_trailer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9272/0798/files/odd_fellows_flag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0513/6024/files/41010494749.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2707/0104/files/jazixijoluzotolifelexo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2094/9403/files/zibefabuve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6144/3748/files/chemical_reaction_practice_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6077/1481/files/conversion_factor_chart.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_off0000c991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC991 5420 bytes
SHA-256: d7c5debbbc6c46f28480c26f83211f77357f1d3b69241222aeb1039119f57ac6
font_01_sfnt_off0000dbdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDD 2284 bytes
SHA-256: a81efffa75c967d1bc98efefb4ce87308f9622f6ae59e545ca068a02710c0409
font_02_sfnt_off0000e61d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61D 10284 bytes
SHA-256: d6511008d1328a46fb15921259b5fd33d659181078d3fb080e4e719fbdf6cb1d

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