Malicious PDF — malware analysis report

Static analysis result for SHA-256 cda13799fc63e9ed…

MALICIOUS

PDF

37.0 KB Created: 2020-11-09 13:00:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-18
MD5: 9309bffd3589b18b72c0e4cfe084746f SHA-1: ab77801c538b2aa6c2f730d071768de027c1a415 SHA-256: cda13799fc63e9ed0c6823ec8d652801073e20e5d23331a4a95f986e28a1a59c
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/aws?keyword=roosevelt+elementary+student+portal PDF link annotation
    • https://xesapidad.weebly.com/uploads/1/3/4/3/134346602/jeniwu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387420/normal_5f98311ba0e71.pdfIn PDF document text
    • https://ruwadegefanum.weebly.com/uploads/1/3/4/1/134108857/sudifuv-rejodavoduxanim-nigazupurozu-wetolalu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371005/normal_5f8be770e773d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/henghuili-files/administration_and_management_in_education.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/239532cf-9e85-4e63-98ea-b6175fcb04d3/wilovonixeroge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29f593a4-5ad9-40c6-97aa-e2afe3a86405/28622166276.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/73008859254.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/68571650212.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/kk_emoji_keyboard_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/47169256624.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/penigoluvozemufefujoze.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/42328090962.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000044fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x44FC 5108 bytes
SHA-256: 9b1dd06996aeb41d0fbd2c66b828a4d51d433952fd94fb72c7131889e221ed01
font_01_sfnt_off00005645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5645 9492 bytes
SHA-256: 3262bbb948ad1627e45e0443957118f983ce1dcc9c248b572173a269a1ea02c4
font_02_sfnt_off000076d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76D9 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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