Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b3e28ed09d8b591…

MALICIOUS

PDF

72.3 KB Created: 2020-10-21 23:14:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: c1e24ce5cbdd1b832ea25dacdff46402 SHA-1: 85ec104683f954da4eb87d99c875badd39ea7ad0 SHA-256: 4b3e28ed09d8b591dc4d005bba9ccba46c8c6b9f27dc135e939efb24aa416319
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.me/pify?keyword=acuerdo+de+paz+en+colombia+resumen+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366665/normal_5f88b8036c243.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371258/normal_5f89415255933.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393348/normal_5f90775e1c56a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380392/normal_5f8b205a80edf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369766/normal_5f89094a209fb.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/jatelu-zukolugaw.pdfIn PDF document text
    • https://tadeganerusoza.weebly.com/uploads/1/3/1/4/131438541/6566736.pdfIn PDF document text
    • https://zadumeredevasax.weebly.com/uploads/1/3/1/4/131453870/sevanubiverapekaxeto.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/vunud.pdfIn PDF document text
    • https://sijevunima.weebly.com/uploads/1/3/1/8/131859613/gatixikanoferif.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/c8ddf8c4-3800-42e2-8a31-dedb8e95f1f6/51959047068.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9707a4c2-2e48-4df2-a8b6-286bc7b85775/70530101299.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6815/3239/files/douglas_adams_goodbye_and_thanks_for_all_the_fish.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0844/8920/files/quantstart_successful_algorithmic_trading.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/1973/9551/files/what_is_the_role_of_a_primary_consumer_in_an_ecosystem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32732c2c-e8e9-4bc1-a681-0c8e7b3f79c6/research_methods_for_the_behavioral_sciences_5th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9670f6c9-ec99-4588-a49c-bd2db6faea7a/55811388625.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d45454a0-b1ea-4687-a281-7867b54a46d8/7345051028.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91ca7496-cc7b-46a3-b6ad-65c74be8ee33/lebojew.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_off0000daa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA6 5480 bytes
SHA-256: 4100f89f3778a758cb88d4ce36f7c2cd5ad761392a4345da0e7113e219615135
font_01_sfnt_off0000ed2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2A 11336 bytes
SHA-256: 53fc69c0a8f55e3335e45f777a3de6e0c6d5ec4cd6140d386f8699da1de39e2a

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