Malicious PDF — malware analysis report

Static analysis result for SHA-256 a453ee944bd2d6e8…

MALICIOUS

PDF

33.6 KB Created: 2020-10-24 07:27:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 13e719f41c1a45a15eac7f36893cc903 SHA-1: 9cd090716ba56bc6df492002228b5cfecd47e551 SHA-256: a453ee944bd2d6e88e4ba95176258826abd3411345857fd04b7c5b7d92a28d6f
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://ttraff.link/123?keyword=church+history+in+plain+language+pdf+download In PDF document text
    • https://gemaxudemaxepeb.weebly.com/uploads/1/3/1/0/131070646/zamorilan.pdfIn PDF document text
    • https://mapipuluzobeb.weebly.com/uploads/1/3/1/3/131398440/lativavutofotaz_kunes_suwivi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370052/normal_5f8952e2e0ce1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384471/normal_5f8c27b3a4b04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408878/normal_5f9386515dd78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373520/normal_5f8a744023b41.pdfIn PDF document text
    • https://radiduma.weebly.com/uploads/1/3/4/3/134362755/2acd17a8.pdfIn PDF document text
    • https://lozulijulejibog.weebly.com/uploads/1/3/1/8/131857057/7244574.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/c22f1661-f244-4f41-8b15-a98ed5c9c2ab/73273440806.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82d55e90-5cb9-4dc0-bd9a-3f6673529a1b/29273991072.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11041d85-853b-439e-958f-296a3e7e9298/77139915947.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d784c7c3-b830-430f-a323-7eb165068722/21847364606.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c3694a1-7c1a-466a-a8b6-377f2039a467/xozuworijefubija.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e902a581-1d66-40e6-820b-27bf0bcccffb/atl_free_movie_download.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/rbi_grade_b_2019_notification.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/business_casual_dress_code_policy.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_off000045a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45A0 5516 bytes
SHA-256: f77bc68f0b9335b461e0814a121c27ffad141fc8a307c9c7dac7a66d2ed960ad
font_01_sfnt_off0000586d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x586D 9068 bytes
SHA-256: eb2ce25206943acc513b053fda0bb6069f609dc5147479bbc78231fff1ce59e4