Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaa1cc7629e91c1c…

MALICIOUS

PDF

48.9 KB Created: 2020-11-09 03:54:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 741d61c47bd85d31b1749c309d66c1c9 SHA-1: 09f707012208acd5cb14ac3e7bb62b7df0a17b1e SHA-256: eaa1cc7629e91c1cd513ddb131be30e621119c42f26c139d01bea0243f33f92b
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/aws?keyword=harvest+moon+sunshine+islands+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393506/normal_5f8faf238cb9c.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/5797277.pdfIn PDF document text
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/6082316.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/gewuwasi/latir.pdfIn PDF document text
    • https://tevarew.files.wordpress.com/2020/11/88608638079.pdfIn PDF document text
    • https://bitoriwemik.files.wordpress.com/2020/11/sexis.pdfIn PDF document text
    • https://feluxeb.files.wordpress.com/2020/11/35311836295.pdfIn PDF document text
    • https://felibule.files.wordpress.com/2020/11/39295054780.pdfIn PDF document text
    • https://pifujimuseki.files.wordpress.com/2020/11/83908810896.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/87862604687.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/weste_erickson_died.pdfIn PDF document text
    • https://s3.amazonaws.com/mupuraregonu/binary_molecular_compounds_composed_of.pdfIn PDF document text
    • https://nunerov.files.wordpress.com/2020/11/xokogunuzebiba.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/59666303722.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68C7 6932 bytes
SHA-256: ea81cb6e9adc19ee2b858609daa9bf3592c33bc7d90e7b8c5e4e73baf28417a3
font_01_sfnt_off00008058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8058 5260 bytes
SHA-256: 137c853d820a7b9ef7328e624e6586bf02accbc8d0c1f3631feae9d0bdfcf888
font_02_sfnt_off00009216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9216 10664 bytes
SHA-256: af72d82ccec548a13b4ef6f63faf84f473696734166b2617bda0d45e718ce270

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