Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9fd3a548bc758b8…

MALICIOUS

PDF

47.7 KB Created: 2020-11-06 13:25:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 2063fb2885afa14afc13f271ef7b1f9e SHA-1: 7aeeafb62600c09eb3f1de87caba45704a006cca SHA-256: f9fd3a548bc758b80c102ebc13da07708e29bd346f64f13157cc643249b5108e
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=leon+francis+found PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365659/normal_5f87667e8bd5b.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://uploads.strikinglycdn.com/files/b2d9b8bd-979c-4890-a6e0-039e01630621/wiluza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c37adf1-5f7b-4861-87b3-a524c090ca50/zokiluvagedenituni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8adf5b1a-94f7-4ae0-8b3e-6ec7cc3311ec/78264038136.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cffbb95-0372-4c70-a4c2-3d09a0131395/teacup_white_pomeranian_puppies_for.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/48827237131.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f93c7ab-984b-4375-a3d9-88b9add93a41/lonotewepajakalami.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e64d4208-00b2-493b-83e1-1f7700de0b83/59743808156.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5bd7b2d-07ad-46d7-a642-69c803f309dc/rixadupivanigodo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48d111bd-ea91-4213-83f2-33e88902f9e8/10500710088.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d5122e6-2faa-41d2-9670-c12ea3ebccba/68227345853.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004fde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FDE 4728 bytes
SHA-256: 2683fabd299c8e6bc02ece429e77b94fff231099fd069c169ca978f4479ffb74
font_01_sfnt_off00005fe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE5 2576 bytes
SHA-256: dac5454a874e52cdd4b1c847f77d5d201cde3a1121f73569664cc15d6c0d8e9d
font_02_sfnt_off00006b2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B2A 10360 bytes
SHA-256: 761c8087eff033f0a71489506eacb6820ac321c681c966139b575aabd5364dc5
font_03_sfnt_off00008eb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EB6 16168 bytes
SHA-256: 8c1e3298cb301b6aa2c2aeff0a89e1cafee6626e56d5ffa98ad52a7598c40df9
font_04_sfnt_off0000a3bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3BB 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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