Malicious PDF — malware analysis report

Static analysis result for SHA-256 798c115a75625771…

MALICIOUS

PDF

43.6 KB Created: 2020-11-05 20:55:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 46a66403fcc6931622b309a5d839cb4b SHA-1: 0327f29d43175d765e3fd88d180ceb767e34bfca SHA-256: 798c115a756257714982c9dab72a9b64a9c0350b7a14a84eba968d0a19718256
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=small+engine+repair+books+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380209/normal_5f8c1c01ba730.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/safago/naruto_shippuden_episode_355_english_dubbed.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/davutaxifowojizifalat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b54766df-71b7-4e78-91f2-2979520ec199/hot_tongue_of_dog.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/1768528357.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/57835113001.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed796139-d43c-41a1-a1b3-bc1527d2016d/the_rose_of_paracelsus_on_secrets_sacraments.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/jinisozekemaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6734e0b3-d278-4ba4-ad8a-012f55e6a267/gikesiso.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/sogodoxarogivivi.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_off00006a40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A40 5528 bytes
SHA-256: db5b3bf638bca1b393a5bfe61219448c2508dd243082ba3e62880f6d95699625
font_01_sfnt_off00007ced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CED 10748 bytes
SHA-256: ea7906d7a2262329bc06d727f90a8284bfb2b55fc567d70fd9cf5d21470a2487

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