Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7236b02b9964e9e…

MALICIOUS

PDF

36.5 KB Created: 2020-10-11 11:51:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: f205acbc68f90312e559888b2d08777c SHA-1: bdb260f8dad520bfad97fae1050771966a644ea5 SHA-256: d7236b02b9964e9e90d87cca191995738ebdf3dd89de019fbb621af8f0941e88
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=problemas+de+funciones+4+eso In PDF document text
    • https://site-1040438.mozfiles.com/files/1040438/sozidepitopigifojemigu.pdfIn PDF document text
    • https://site-1043798.mozfiles.com/files/1043798/durivano.pdfIn PDF document text
    • https://site-1038517.mozfiles.com/files/1038517/4188778398.pdfIn PDF document text
    • http://files.ninjamagik.com/uploads/1/3/0/8/130874629/jatupisejumelovavog.pdfIn PDF document text
    • http://files.susanhandelman.com/uploads/1/3/1/4/131454482/8f25e4492aa.pdfIn PDF document text
    • http://files.karahcouchphotography.com/uploads/1/3/1/4/131438044/nalusofamanuledom.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/1/0457/5975/8492/files/35881844541.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/6488/5916/files/super_smash_flash_2_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4537/1560/files/29163914833.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1946/7934/files/sonegudukisilukaroruko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf48cc2e-fe66-4542-a9da-3324e6c04b7c/87614847759.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/278229fa-420d-4af6-8ef1-50e924d68f3a/mevigubigivapixugedala.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c36daa4-6b15-45f7-8335-78d2f9b97314/94495843146.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d1d14ed-9d66-44ff-a8ae-c5ea5bcf6542/musawipip.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_off00004d40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D40 5396 bytes
SHA-256: 5e5c2473f72740e1ba474cd8b18667bb67e9a6d335f5aa0206098e67a824b965
font_01_sfnt_off00005f7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F7A 10948 bytes
SHA-256: fed55ee25e95cbf9fd9cfe3f8f08e780cd19db99656b608a744fecbf25584f73

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