Malicious PDF — malware analysis report

Static analysis result for SHA-256 8efae0b293698e16…

MALICIOUS

PDF

47.7 KB Created: 2020-11-08 01:42:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 314d3535158d5af8ea53baba9c33baa0 SHA-1: 00e2be93490a52fc262b0e37b220721be5869118 SHA-256: 8efae0b293698e16e673ad2c3e964f1f18462ae84861393fa5df8d8cb621921b
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/123?keyword=sig+556+re5 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378167/normal_5f9fc807a3e5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406501/normal_5fa20c9ca0bf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420260/normal_5f9f44c118596.pdfIn PDF document text
    • https://zunesevofulopu.weebly.com/uploads/1/3/4/3/134385883/lokuravowoz_pimojanu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385021/normal_5f8d8afb8a10e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405206/normal_5f91ea3621553.pdfIn PDF document text
    • https://gidexexururetus.weebly.com/uploads/1/3/4/5/134505918/7148308.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373779/normal_5fa0dc144baa7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375521/normal_5f91e9523a233.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fevenakom.files.wordpress.com/2020/11/lavumokulegigijaw.pdfIn PDF document text
    • https://milosozefij.files.wordpress.com/2020/11/28829222792.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96ebf339-eadc-4407-9445-3f5b229f244d/servidor_dhcp_windows_7.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6633 4816 bytes
SHA-256: c72ebdfbd26c5e17724d77fed4533d85a9afbef61e8d996a9d550d9ed0322cb6
font_01_sfnt_off000076ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76AB 10988 bytes
SHA-256: da291bcaf18bcc5e427e06412afbb79518a7c416e474be5afe56312487745207
font_02_sfnt_off00009c44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C44 16376 bytes
SHA-256: c3d0ee408bee49a88931d2ac630a9fb52e88a46fabab5a72aa19e78bbe1d3826