Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8ae5c86bd2643b8…

MALICIOUS

PDF

45.3 KB Created: 2020-10-28 16:41:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: dcb82b7b40b4ccfb8ff7d3ccd98c0fa0 SHA-1: 1b9e5fef12cb380f15951ad5a65e4ec2914c36af SHA-256: f8ae5c86bd2643b8a25201daa27f29f9bd48161090aed1d1aa2d7f3df315fb30
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/aws?keyword=gopro+hero3+silver+edition+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4405654/normal_5f9605caccb05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373240/normal_5f8def3ce0918.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413013/normal_5f99327b51959.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388158/normal_5f99002b77929.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406241/normal_5f9979a4eb494.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385647/normal_5f9919b795f71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402297/normal_5f9679d590490.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381094/normal_5f975f6063a09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368489/normal_5f9116936661a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366653/normal_5f8a42ed33e12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379603/normal_5f8b5b6d416b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387702/normal_5f8e630bd8b8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380068/normal_5f8ddfc194749.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005cd7.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005cd7.bin)
    • https://uploads.strikinglycdn.com/files/75397c77-4b67-48b9-a4b4-d7fbb6f302a1/nowalawalolagujegoguremem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be06d75e-742a-4f3e-83cb-26186e22c288/58293944495.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00780d83-9a57-4a90-acc4-9e8dbd5bbbac/71310138069.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1558/5448/files/79225402943.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e510408-63d3-43ec-9acc-34c725d764ae/definomofasizezenamanoter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/404f75b0-f8ad-4d6b-800a-568cc47d8978/blockchain_revolution_epub_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64ed388a-30a4-4cce-82fc-b49a5a326292/dotusatekotopife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f3afa54-c02e-4a64-86ed-9916ddcd3a80/ropejalekajafewejufemaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5435/1015/files/ligoga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a868530-fa0e-44a9-92e2-d779ff3269ac/37964961581.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 extracted file (font_00_sfnt_off00005cd7.bin)
    • http://dejavu.sourceforge.netIn extracted file (font_02_sfnt_off00009296.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_02_sfnt_off00009296.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD7 5456 bytes
SHA-256: b705d6772e590e958bf76fb9fb1fd52c840bc997f2759b6375f4076c1e508d90
font_01_sfnt_off00006f3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3F 10236 bytes
SHA-256: ae253a20fecb75b78def07acd036d499e699defa17027bf06f68759aecb21876
font_02_sfnt_off00009296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9296 16060 bytes
SHA-256: bb4620ae2308066493f479cb0495314a41e91f5b0bfb2a754d9bad2ef34af03d