Malicious PDF — malware analysis report

Static analysis result for SHA-256 759601807a8edca4…

MALICIOUS

PDF

48.9 KB Created: 2020-10-01 19:33:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: e31dd030da50617bd325ccfda1701ec5 SHA-1: 006757ac6de79f5ef8206319d9f305106fabb611 SHA-256: 759601807a8edca49222ae05571f9b99130ea4b14b385ebe18c6fc4ea8cf9928
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=euripide+andromaque+pdf In PDF document text
    • http://files.nxpkinkora.com/uploads/1/3/1/4/131437676/renokigobamogekuri.pdfIn PDF document text
    • http://xemevazi.hoteltopsusa.com/uploads/1/3/1/4/131438847/97fa81db6dc8b2.pdfIn PDF document text
    • http://files.richardwilliamsvideos.com/uploads/1/3/0/8/130873822/5090814.pdfIn PDF document text
    • http://zejediz.shedpotterybyjohann.com/uploads/1/3/1/3/131383284/595597d.pdfIn PDF document text
    • http://files.keithalman.com/uploads/1/3/1/8/131857580/rivukopopoxikoxe.pdfIn PDF document text
    • http://files.bmvisions.com/uploads/1/3/0/8/130814769/9828415.pdfIn PDF document text
    • http://files.tatiromo.com/uploads/1/3/2/3/132302824/marasifipuketif.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/1/0433/1975/4907/files/dedosidaxir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/6761/5648/files/94848589655.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3286/5699/files/kill_team_rulebook_vk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0623/8613/files/the_mine_song_remix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/9581/2005/files/dabusabojepaparoxale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2440/6935/files/25412477622.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_off00007b34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B34 5060 bytes
SHA-256: b278ed4217ae0c6957c26d847e8653ea171991afffe8a68b929770e39320e47a
font_01_sfnt_off00008c56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C56 13444 bytes
SHA-256: b83b2beef196347846431bdd8a691a3fdaaf8eeb719a50b91361bdc00ab6e86b