Malicious PDF — malware analysis report

Static analysis result for SHA-256 509ecf801c97370a…

MALICIOUS

PDF

49.7 KB Created: 2020-11-06 11:50:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 5a2f4ce6b8c3ce8de072de11fde28a2b SHA-1: 244ccc89fbf9a1293382494ac31645e6bc3d863c SHA-256: 509ecf801c97370adfffae2d9be58d9d8c430c3f6e10621dec81f30da62d37b8
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://traffking.ru/123?keyword=fortune+arcana+persona+4 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403674/normal_5f9116b4c99cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380073/normal_5f96c757ee470.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f88fa86e2bd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406202/normal_5f9c7f56ab92c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388596/normal_5f8e2a33c9c57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417046/normal_5f98dfd735437.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390052/normal_5fa01b41cebc5.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://s3.amazonaws.com/bajuse/90751350905.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/317e0684-92c5-423e-9237-a0896668aabc/54099598611.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36667637-9cfc-4891-a438-cc898f866c26/55438345749.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/beeff33f-d959-481b-882c-afc000a02dc2/xubofarelo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1580924c-3e4a-4a90-91a6-0cef208aab5f/mofuzemabixexen.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/pajerebowifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/479f7ea0-4161-43b0-8640-90a971116784/38467756023.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000698b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x698B 3648 bytes
SHA-256: 8ee7436eb78134a70e96a91cb4c0e03981725790e31aaa01b07c4272cb0221d0
font_01_sfnt_off00007664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7664 4772 bytes
SHA-256: 5ca414d09010fe197364cee2d279c1920d1b64534898f6662cd5a0adedf8e6b3
font_02_sfnt_off000086a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86A4 10736 bytes
SHA-256: af3663bce4b077b6d9c8daea56a5cc40e75d89a5da6b9f0bafd5c91fa4535818
font_03_sfnt_off0000ab38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB38 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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