Malicious PDF — malware analysis report

Static analysis result for SHA-256 c52273e0504a9f47…

MALICIOUS

PDF

45.0 KB Created: 2020-11-08 01:21:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 89e09fd9db34e8d58cabf652e2d167f7 SHA-1: a17b6f7a99a3da3fc474c970dbf3e46fe1d8014a SHA-256: c52273e0504a9f47635b066239b6f40086d119e9ba97918f6b2ababf57129301
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://traffset.ru/aws?keyword=acellus+answer+key+science PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378405/normal_5f9a153d8d4cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447450/normal_5f9ef87be82e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374371/normal_5f891de915e19.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/anemia_perniciosa_diagnstico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57e5c1d3-6db1-4c27-a0e8-42eac27d656e/paradigm_phantom_v2.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/sword_art_online_progressive_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b10a8d50-3858-46b0-8b7c-34ae94d282dd/jixojepoladisa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10b70457-74d0-40e2-8b2f-fa9a837a0e33/lajewid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/438efa77-b4ee-4e2e-8395-a691f0f15e77/97488534218.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/wamapukolativ.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/anthropometric_measurements_in_pediatrics.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/tunoterosidegorutaji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d778737b-e87c-44f4-9bea-da42284051c5/15573100814.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_off00006ea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA9 5040 bytes
SHA-256: ed4767430e803fcf4a90536874efd07c03bae6ad27c6a882df936070e09f35ee
font_01_sfnt_off00007ffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FFC 11400 bytes
SHA-256: 633f8c803828813e16c7e44e6a55330c6e8425bbcf1e1ded4bd1a3f2de7795ec