Malicious PDF — malware analysis report

Static analysis result for SHA-256 afb3d792a49a8929…

MALICIOUS

PDF

55.3 KB Created: 2020-09-30 07:48:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 7fa2b5fbb077a0f77de5aa2c77e0b6f2 SHA-1: b7d7fc4eb5cdfd8e0367d597d4157108e1f9f03a SHA-256: afb3d792a49a8929bfd2ee8444fece0075429a9c2f4a817edf81d47f6db5efac
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://gettraff.ru/strik?keyword=artilleria+alemana+en+la+segunda+guerra+mundial+pdf In PDF document text
    • http://gosige.officialmrsmith.com/uploads/1/3/0/8/130813821/bokimavopediguvoluj.pdfIn PDF document text
    • http://files.infralinx.com/uploads/1/3/1/8/131871625/jalisowosogezun_bonosuwutu_temizisokata.pdfIn PDF document text
    • http://jalikif.thewritephd.com/uploads/1/3/1/8/131872144/fe8c8025f52e.pdfIn PDF document text
    • https://site-1036876.mozfiles.com/files/1036876/23576112815.pdfIn PDF document text
    • https://site-1036855.mozfiles.com/files/1036855/15917449850.pdfIn PDF document text
    • https://site-1037897.mozfiles.com/files/1037897/netamin.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/1/0430/6305/0394/files/runowadodajuxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/4856820657.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9837/7891/files/99370258077.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7317/4680/files/air_cooled_condensing_unit_installation_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a84eddff-68dc-4582-8e67-05880b36ddee/58014017751.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d36c24c-39a2-482f-89a2-cba81fe77b13/rafoxedigog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbc322b1-49dc-4644-b2cf-7459b1e4a4c0/45554765539.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_off00008e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E63 5348 bytes
SHA-256: 6961b4e64b0f60a2a4f8172303e404813c3e2a0cd05b11c721bbd14359a870c9
font_01_sfnt_off0000a07b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA07B 14972 bytes
SHA-256: ef5f561bf6bf3f14b666241010eb64576751d78f0c4539074faf502d5c27bb4f

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