Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a7869159e02b0b8…

MALICIOUS

PDF

46.2 KB Created: 2020-10-18 21:13:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 38841bbb978d4b65da94d3ca1ac4ba37 SHA-1: 227f7792054b67c7622e5b38a50c12fdae3a3b47 SHA-256: 2a7869159e02b0b8b666243a1e00146152a047ac4d17e1d7e0ec494ec6dce5c8
174 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://ggtraff.ru/strik?keyword=free+agar+io+minions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365599/normal_5f8751532fe0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370302/normal_5f890d4ce9462.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368979/normal_5f89200e16a1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377410/normal_5f8b9d217ae1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374181/normal_5f899681926b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372963/normal_5f8b4f91587eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5f872c4ec49ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384628/normal_5f8c4d434ed65.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/19817f9e-a818-49bf-bd7f-b14a27996a76/godamowil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e533e994-27f0-4ab4-aca2-52c8ecb2bbf6/43323814007.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6edb644e-5f44-4d14-9b4a-80cc0bb2b80d/57926303130.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa22c0c4-6d06-4f69-9b3d-89096f23aa40/igcse_physics_revision_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b8561b3-5d14-4573-860f-8c73f173b7f0/bebisakojino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51b978c3-4b2b-4974-8bd1-ff97d7b7237e/94770501426.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14ef9c57-ec42-44ee-9679-199bfca5f5e0/xekeziju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b52d0a8-fd56-43e0-8b2b-70442dad62b3/dixunulogepidoroj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e21f4e5-14d4-4b0c-9a35-b17a256f5ee4/kadidasililelivugus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec2131ca-299b-45ea-87ea-188b46f0d31f/sineretedej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a328a1a5-b2b3-42cb-8ed9-749aa7941fcc/tamaxupunafixez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92a3894c-9a63-43c9-94f2-75ad691b5117/gijotifap.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5494 3312 bytes
SHA-256: 4499753c14a1c2515d53481a24fb05f53d1c2bac05d93527ae9f8383c058b5b9
font_01_sfnt_off0000602a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x602A 4636 bytes
SHA-256: 6f029319dfebde69c86b821ae094a6208c74645bc499cf80aa848117ef7c8cda
font_02_sfnt_off00006fb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB3 2356 bytes
SHA-256: 4e5c326aae17ab69a01938a57eabd9a6e0d650e74e94b97ff633b705ae02d914
font_03_sfnt_off00007a71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A71 9984 bytes
SHA-256: c156882e53e7c0f806fe575b20bcfbf94704a287afe60892cf3684819ca164a3
font_04_sfnt_off00009cb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CB4 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3