Malicious PDF — malware analysis report

Static analysis result for SHA-256 76f35cbf0df70f9e…

MALICIOUS

PDF

48.4 KB Created: 2020-11-08 09:03:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 8fbdc5271595743b0d0db0b0db2d07e1 SHA-1: 33e986cfca4dd563470dcc627fddb321daa52ef3 SHA-256: 76f35cbf0df70f9e77b3e9c67d6db879b26b0cfc569440583042762569c89741
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/123?keyword=woodlife+coppercoat+msds+sheets PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370303/normal_5f89ede752f1b.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/2122744.pdfIn PDF document text
    • https://durewisopugus.weebly.com/uploads/1/3/4/3/134369166/gudupetisediruvaguw.pdfIn PDF document text
    • https://nulixedupalaz.weebly.com/uploads/1/3/0/7/130739510/8ca522c.pdfIn PDF document text
    • https://rosuxemu.weebly.com/uploads/1/3/0/7/130776582/e3e5c8cd.pdfIn PDF document text
    • https://savakorudefipe.weebly.com/uploads/1/3/2/3/132303238/peraginofela.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/salvation_army_employee_handbook.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/fender_frontman_15g_cord.pdfIn PDF document text
    • https://sitedok.files.wordpress.com/2020/11/dafizurusedumeminiba.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/manual_capture_one_12.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/batman_mugs_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/no_man_s_sky_explorer_ship_locations.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/76837761706.pdfIn PDF document text
    • https://s3.amazonaws.com/jevuxozazebazug/college_scholarships_2020_for_women_athletes.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_off00007cbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CBE 5408 bytes
SHA-256: 7408cda052c17cf0037732188f18db67445106e209b00d2b3310028e0dd8e3e6
font_01_sfnt_off00008f05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F05 11052 bytes
SHA-256: 20b471cbf6fcf2e4634f57e379d32be66251478da3f78a2c89a03f15befdea97