Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8e90975df4e600e…

MALICIOUS

PDF

43.4 KB Created: 2020-11-06 16:14:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1b09864c874522d0024f36a4860af2a8 SHA-1: d9575e8819dc65f5622b5803c853a1614461430d SHA-256: a8e90975df4e600edce591bc05ddbd95ac15012db7eeaecc9aa7eb88b72250f8
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://trafficel.ru/aws?keyword=dev+anand+guide+songs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366989/normal_5f98d56387899.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380413/normal_5f98e96dbc884.pdfIn PDF document text
    • https://gelokiranik.weebly.com/uploads/1/3/4/3/134330064/kidudonibutuba.pdfIn PDF document text
    • https://worobewunit.weebly.com/uploads/1/3/1/4/131406731/boruzamazixejap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374013/normal_5fa414d158786.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368978/normal_5f9197c32bb23.pdfIn PDF document text
    • https://gasipepimajut.weebly.com/uploads/1/3/4/3/134367512/bd0c6bc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393179/normal_5f9fe4c43b84a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0c10ee1-1bc1-4304-a661-93f602b8e62f/gypsy_hill_butler_indiana.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/2020_canadian_calendar_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04dbcdf4-ca24-46f6-a9f8-1cdf68f1196f/95969887696.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34f6f4e2-840a-4c63-a989-51d341519145/72662707296.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f5dd9cb-36ee-4d4d-9e36-ab7ced2400b3/certificate_of_non_response.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_off0000681d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x681D 4924 bytes
SHA-256: cf6dbd22029647ebd2baf234bf0dc90cfcaa061b3ffa72c097ac9652f76438e5
font_01_sfnt_off00007903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7903 12020 bytes
SHA-256: 4189e30feabde1da9120f0f678a731c0343449415e9511236c9e228488f939a8