Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b84a4a3a78d2222…

MALICIOUS

PDF

78.1 KB Created: 2021-03-03 21:57:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 1797f67b91a6a0790857cef611bfbd6e SHA-1: 71910a01a49d2cead547f7ef4f734a0bf3c36471 SHA-256: 5b84a4a3a78d22227c22b7abc0e819bfdabe7d0ca9a36d33a6d2e669e89b4725
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/award?keyword=what+is+tin+tin%2527s+dog%2527s+name PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490735/normal_600caee310dbe.pdfIn PDF document text
    • https://cdn.sqhk.co/xuluriwu/9ihhghh/labyrinthine_fistula_radiology.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501961/normal_5ff7abbdeec8f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413573/normal_5fc5f6525f6ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385852/normal_5ff65cbb59681.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368219/normal_5fedc74febdb8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416654/normal_5feed102b40f5.pdfIn PDF document text
    • https://cdn.sqhk.co/budajawisore/jbwihge/88569527949.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492897/normal_6001c6105b136.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462059/normal_5fe7da22f0d04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460465/normal_60272aec91c41.pdfIn PDF document text
    • https://cdn.sqhk.co/rusukumuva/efOgVhe/fox_theatres_wyomissing_pa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425726/normal_5fe156b8a38cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464852/normal_6008ff90ecc8e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476954/normal_5fc89ae81c454.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/sajatesawodiji/zetejetewewugiwob.pdfIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/82034941242.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/stranger_in_a_strange_land_movie_cast.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_off0000f524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF524 5156 bytes
SHA-256: 2d23d9a35eb73fc4471c5207c41506e14278994b50d2d7d3124ae6c55f2273dc
font_01_sfnt_off0001069f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1069F 10792 bytes
SHA-256: 5eba0368b72076977e9eee11ca94656d72b2f44bd6d1989489526046ece6a680