Malicious PDF — malware analysis report

Static analysis result for SHA-256 535747628bfef569…

MALICIOUS

PDF

39.3 KB Created: 2020-11-08 19:52:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 55c8762a756171e99614125315f444a6 SHA-1: bcf59f616c3d8862d480a277b53225fac4f6846b SHA-256: 535747628bfef569b9da7045a81e81c472c9d065a415a46bcb6bcabe3ba313cd
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=uiuc+summer+2020+online+courses PDF link annotation
    • https://kileligujet.weebly.com/uploads/1/3/4/4/134457719/9992979.pdfIn PDF document text
    • https://zutovabofilosu.weebly.com/uploads/1/3/4/3/134333865/litesunemumi-puzezafazafu-mororizu.pdfIn PDF document text
    • https://dekekutema.weebly.com/uploads/1/3/4/4/134440935/8ffad3cebcc.pdfIn PDF document text
    • https://rizenorugeworo.weebly.com/uploads/1/3/4/3/134379336/wafejil.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/dafa7ccd-cca5-4ff9-af45-ba66311a0462/muxujijibiraweri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cbd3892-b541-47db-a121-a96de09ef60e/69993925275.pdfIn PDF document text
    • https://baginalikut.files.wordpress.com/2020/11/math_worksheets_multiplying_positive_and_negative_numbers.pdfIn PDF document text
    • https://newikefobite.files.wordpress.com/2020/11/66146375716.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0009483-d7af-41fb-ba78-3e26881a1bde/molonikij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19f4beaf-58d8-4b94-a195-7b6d20385641/75094881159.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1093e037-6e8c-4f03-b6bc-2017e04c22f6/zuwanun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ad91337-1fe3-45af-8af4-aa443c65605c/2698719493.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_off00005c2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C2F 5000 bytes
SHA-256: 4ab9b3f2d977d3544846f6c424088b889243a05a8bb737570ed79c8ece30816c
font_01_sfnt_off00006d22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D22 10448 bytes
SHA-256: 8796823ddcb26928447d25b0ad04dc79c97fda53d479533b6b38d19458bfa2eb