Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb94101e70059512…

MALICIOUS

PDF

50.2 KB Created: 2020-10-28 17:48:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: e3a4d194d79cd6dbb638872bbc05b80b SHA-1: 3fe32f44303aa2f2a6e6f532f7919b954a4fc4c1 SHA-256: eb94101e700595123bc30d1bb39e87fb291d5c0cc0be8a447e2f5683ef031253
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.me/123?keyword=aares+conference+2020+perth In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383147/normal_5f98168d128a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380080/normal_5f8fe24f7b5a6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e13d78c-0103-4d62-8076-85403ecf1302/27404672923.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/9306448127.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3831/7464/files/dazati.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94c16f7a-a033-4f47-b94d-3a26c14544ba/deburasamenopifilifomabug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e977c83b-a4d4-4ca5-b590-00eb477dcb2c/97324821509.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/19959722588.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/43411650162.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/xuxafogixinuwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdb8c6cb-66fe-4f37-9ea5-84897e0b342f/tafexilejefatuzogu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88dcba1b-11f2-4bdb-b583-4bd5f171043e/mensagem_de_santa_claus_para_meninos.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/make_size_smaller_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8907c9a2-4c06-41b9-8768-60bc81814481/snare_drum_solo_music.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/44822835714.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5103/1961/files/92269503448.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11066d3a-8866-493d-8244-59f45091c5c9/18589093947.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7264ed28-24e0-450e-b7ff-1e8c44162e25/10352106851.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/vowabefuximonunizebuxeje.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_off0000853c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x853C 5332 bytes
SHA-256: 04ec1bfa4bcca5084f314d34a869cdc15d6d09a62178746d3ba4a62aca27d4aa
font_01_sfnt_off0000975b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x975B 10804 bytes
SHA-256: b6d3baa6be5c1fb820f99876795fe034b9d3cc88952df8f76114be769c6b6c30

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