Malicious PDF — malware analysis report

Static analysis result for SHA-256 a79a1b9cc0a3c348…

MALICIOUS

PDF

65.7 KB Created: 2020-12-30 20:59:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 7c990e2b8ccb7420e80f26e647d4cacb SHA-1: 1a78117a45cb174befee13f8e871fc641c188d55 SHA-256: a79a1b9cc0a3c34810a27acccc34a27c3bd037c25d4cf88e3ff9896e9128a1d2
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/123?utm_term=soga+en+ingles In PDF document text
    • https://legawugo.weebly.com/uploads/1/3/4/5/134509979/8f73792846f1.pdfIn PDF document text
    • https://rawakewafefefew.weebly.com/uploads/1/3/1/1/131163904/mujib.pdfIn PDF document text
    • https://nodifolosorak.weebly.com/uploads/1/3/4/7/134758422/tijopa.pdfIn PDF document text
    • https://pamuguvijokogag.weebly.com/uploads/1/3/4/8/134883264/7152218.pdfIn PDF document text
    • https://setowunujabid.weebly.com/uploads/1/3/4/0/134095848/wipuzezoto.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/195f4c56-0961-4547-9455-53512eda08cd/xekesotumusavak.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/aye_khuda_aye_khuda_song_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/20728911001.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/savoury_recipes_with_puff_pastry_sheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daf8a084-c408-4359-af62-a6aea6d6b41d/26600630618.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/free_spreadsheet_template_for_inventory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a159b68-df82-4449-b369-823f3a129b3d/carlos_yevenes_gorbea.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/timosefomebujibisixezapel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7515b72c-6f9e-46fa-9635-f0c1b5123411/vovojolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a973817d-b402-46f4-932b-876f09bbd636/15519275978.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_off0000c5e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5E6 4860 bytes
SHA-256: a7264535932d253fb46183a951dfa44eb5187c8755dc6e9a1ea298268e20a576
font_01_sfnt_off0000d682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD682 10864 bytes
SHA-256: 8fa4dd8ba6ceb3808fe34996e1221964b7fa576147818c6a42f6111d4a135b35

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