Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f52c6ef6375240b…

MALICIOUS

PDF

40.5 KB Created: 2020-10-06 20:53:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8820af84f9de12954d0ebca275f18e4e SHA-1: a9a82a81b74631110c30171596fbe86d724cc396 SHA-256: 6f52c6ef6375240bb8ef1a48fe05f7aa4d1bf46498576b06dd0e2452b27c2eb4
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.club/pify?keyword=clash+royale+chest+guide In PDF document text
    • http://files.raymondterracesoccerclub.com/uploads/1/3/1/8/131857544/lofofegenujoz.pdfIn PDF document text
    • http://maxeka.bcartglass.com/uploads/1/3/0/9/130969690/9f757be8a8.pdfIn PDF document text
    • http://files.stellathelight.com/uploads/1/3/2/7/132740209/9282012.pdfIn PDF document text
    • http://bumibezo.nejcrwc.com/uploads/1/3/0/7/130739235/kamikifo.pdfIn PDF document text
    • http://sigibogu.ptartsummer.com/uploads/1/3/1/6/131606349/mujizonozuj_giresepakemati_piwovifuvas.pdfIn PDF document text
    • http://wufob.crafty-copy.com/uploads/1/3/1/3/131379070/gejewelaje-dovagu-gijemefu-zidufotof.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/1/0485/0987/8427/files/the_proud_highway.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7746/7801/files/mastery_mestria_de_robert_greene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/1889/4491/files/yankee_doodle_dixie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6153/4111/files/25699613224.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1989/3927/files/tuxiputaxitazos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/5093/3928/files/65504757578.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_off000060e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60E7 5208 bytes
SHA-256: 0a2476439df38c01c95ec17bc3d997b9662a73f00dac3f6f25773946a00a7ebe
font_01_sfnt_off00007298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7298 10252 bytes
SHA-256: 1dcd67e82292f706ce3363607d75c434573229233e3694e1064fe3ecd19de757