Malicious PDF — malware analysis report

Static analysis result for SHA-256 8383a9be3fb86858…

MALICIOUS

PDF

41.4 KB Created: 2020-11-09 15:09:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 3d8f45bbf3377e849dd8a1f684579e0c SHA-1: 48954a07c98af14cf1ee66d7c95d8fa3f98d0720 SHA-256: 8383a9be3fb868586e78adcf8dfc1647ec3f35a912b59ff5a5f6f1bdbf1a8c8c
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=humulin+davis+pdf PDF link annotation
    • https://risimapi.weebly.com/uploads/1/3/4/3/134321435/kulote_buguwi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407081/normal_5f9a59804f87b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449421/normal_5fa24ff408de0.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/a6249e7e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366309/normal_5f872eb741e78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_5f9f246969b98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368251/normal_5f9019a7b6197.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372085/normal_5fa49c8c6688c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414172/normal_5f9fe21d892e4.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/fejififimaketo/44557523586.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/electric_field_of_a_half_ring.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/the_shadow_effect_debbie_ford.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/88627466977.pdfIn PDF document text
    • https://s3.amazonaws.com/mupakijivuruzim/bapegofopije.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_off00006295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6295 5112 bytes
SHA-256: fb111f5a8b08fb03b4ddd3ae320e3b49ecb60dab3ce654047f4d68708253f610
font_01_sfnt_off000073f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73F1 10936 bytes
SHA-256: 0f3351c3a1838a0230a18d1993db45f3dbbc259d2e2ad6d90eac082b3b1c685f