Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b6ff677b45864c5…

MALICIOUS

PDF

37.4 KB Created: 2020-11-08 21:57:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: b1e31e87fa693b44c447fc30a6d9943b SHA-1: 088de3c4f6ace9c9dba5b3acfa56f4f5dd3541a4 SHA-256: 8b6ff677b45864c5d811ded7cc07a7fc4be8b3b38ae3246c55f21ff1f38d2985
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=army+men+strike+gold+generator+no+surveys PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369501/normal_5f8c3a31104ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373998/normal_5f8ef0aa6a0c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383918/normal_5f95a8f9b5d44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384819/normal_5f9af4e920708.pdfIn PDF document text
    • https://fufivivol.weebly.com/uploads/1/3/0/8/130873849/pikaxuvun.pdfIn PDF document text
    • https://meronikam.weebly.com/uploads/1/3/4/7/134705372/4753863.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366625/normal_5f873d196d3e9.pdfIn PDF document text
    • http://empirecheat.com/army-menIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/winumigutam/sapeluwijupogagigob.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/vuwosezatezopizegef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac500ed7-f58d-4c71-8eaa-ab21b5a9a2d6/sunn_fryser_mltid_ideer.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/retaxegaxamiba.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/the_periods_of_classical_music.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/armas_de_la_segunda_guerra_mundial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd0b116e-e5a1-4896-b423-80ee5cb96120/tibivepegogizazupu.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_off00004fa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FA8 5360 bytes
SHA-256: 3e400c6f2ba116f769d60d3c6c6451b7671472866aa7b77def4f3da53a0966f9
font_01_sfnt_off000061de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61DE 11136 bytes
SHA-256: 41a5d6bcf2c59c8ef96a41dc47e65b18020f7f950c1abb54db5bec612921f396