Malicious PDF — malware analysis report

Static analysis result for SHA-256 846672ac8adf143f…

MALICIOUS

PDF

35.8 KB Created: 2020-11-08 21:28:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 00556ee92be58cce3b53f038cb334519 SHA-1: 286784d313a57d753ad3b257dc579fa82cd40519 SHA-256: 846672ac8adf143fc5d836535fadd8c25b983d4eadc124cfc5f66faeed3b21a5
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/123?keyword=personal+timeline+worksheet+activity PDF link annotation
    • https://nijubalalo.weebly.com/uploads/1/3/1/4/131453980/xevala_bukek_balubi.pdfIn PDF document text
    • https://noxepelobisuse.weebly.com/uploads/1/3/1/8/131871648/9042475.pdfIn PDF document text
    • https://suwanozafedo.weebly.com/uploads/1/3/4/5/134587456/ff8f39e5b0e.pdfIn PDF document text
    • https://nuzilemuf.weebly.com/uploads/1/3/4/4/134479477/a02912ec.pdfIn PDF document text
    • https://gededojoseg.weebly.com/uploads/1/3/4/3/134341448/4936813.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/6230184f-63ee-4634-9fd3-d74ca495d8e6/radio_shack_scanner_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/94408758953.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b348113-87a8-4727-a7da-3b4297a3f45f/6359296209.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/chemistry_concepts_and_applications_study_guide_chapter_2_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7570c03a-2430-48f7-a244-08ffe02b9d20/fumevi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82c82a01-ced4-4e0f-a4f8-68f2341402a3/67776091468.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bac998c4-b5be-4aa2-bbce-5c1dbcc14621/10366569297.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f5ca471-795b-4278-b5d0-fd7cca2a74d5/nujugatoziwamekif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2abe3cf-63ad-4956-b131-83916b70d27e/47773997077.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_off00004d5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D5E 5356 bytes
SHA-256: aa3e2cb2542e968f119a03bf4b2d0f0bf5efb25140f01d820a2c7a1fa2e02f76
font_01_sfnt_off00005f82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F82 10244 bytes
SHA-256: 8231d891c45f9bfdb7cdb4a5f04cc793ccc32fbb9b54237cebb19491a23215c1

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