Malicious PDF — malware analysis report

Static analysis result for SHA-256 b425ecdd5e4091f5…

MALICIOUS

PDF

42.6 KB Created: 2020-11-05 15:39:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 4d0dd1ef5357ed26768b9a297c9f90ff SHA-1: 2435332200bcfe0a817f8f5f296a8d2d9ec79dd9 SHA-256: b425ecdd5e4091f53b90abc1c19ecdd6f79a899aa50f2775e22a20dd66acb70d
84 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=jurassic+world+hacked+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373778/normal_5f9b0d18140be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376380/normal_5f9e87111caac.pdfIn PDF document text
    • https://zosupexaduj.weebly.com/uploads/1/3/0/7/130738593/vorifakorebudi.pdfIn PDF document text
    • https://vegilirebaj.weebly.com/uploads/1/3/1/0/131070576/5346685.pdfIn PDF document text
    • https://menebunokusup.weebly.com/uploads/1/3/4/5/134588819/kuvepuj-wigotewibop.pdfIn PDF document text
    • https://mubopizolofovo.weebly.com/uploads/1/3/4/4/134442803/puwabinuba.pdfIn PDF document text
    • https://rebolotor.weebly.com/uploads/1/3/4/3/134364816/ba1ff769baef84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464542/normal_5fa398f599eb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409614/normal_5f9c4e9dcbb65.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c9f3c6c-6a79-4064-931b-6bf96e32857e/tizegotitigatibizewa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9e5a25f-9efb-4f7d-9950-eab1409cee52/86649221669.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_off000066f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66F3 5308 bytes
SHA-256: a3b9b6882f19d960c5cc51ca820cfe7d4ee983a559dc82d3f92912fdb9501597
font_01_sfnt_off00007901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7901 10768 bytes
SHA-256: b173b5ad067ba730d08340a3b1ebbd655505030bc4acbcb3ae6e5a2f28e56b27