Malicious PDF — malware analysis report

Static analysis result for SHA-256 197d95b23f6ce4b1…

MALICIOUS

PDF

70.6 KB Created: 2021-02-19 01:23:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: db068bf44c49070b9b0297a1f7d7594c SHA-1: a0fb32f21d0e9ab37a0b1d294b829340dcee7fb4 SHA-256: 197d95b23f6ce4b1d4710b081b78e892b96e2a10f734537c6b084b7b11135f78
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baarspo.ru/wb?keyword=librecad%20vs%20freecad%20vs%20autocad PDF link annotation
    • https://cdn.sqhk.co/sunomedude/H0jebja/scruffy_day_meaning_in_urdu.pdfIn PDF document text
    • https://rumikupim.weebly.com/uploads/1/3/5/3/135310872/6898509.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446019/normal_5fe9539150452.pdfIn PDF document text
    • https://mazegiwekode.weebly.com/uploads/1/3/4/5/134529082/vuxox_zaminibipa.pdfIn PDF document text
    • https://vipukawolatu.weebly.com/uploads/1/3/4/4/134486161/subunuteneramo_jemamojix_kebetijeru.pdfIn PDF document text
    • https://rerararomimin.weebly.com/uploads/1/3/1/3/131383042/893112.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/tigewibejageju/nakodefovo.pdfIn PDF document text
    • http://wefexafunedex.epizy.com/roxijetupepiwelonemo.pdfIn PDF document text
    • http://joluvolob.epizy.com/prepositions_in_on_under_next_to_worksheet.pdfIn PDF document text
    • http://tizedukef.epizy.com/pugoxazololaz.pdfIn PDF document text
    • http://sezajebufixi.epizy.com/sidaxisifevederukumegug.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/21268394937.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/xbox_360_controller_usb_connector.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/handwriting_practice_worksheets_grade_3.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/23522920447.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_off0000d840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD840 5124 bytes
SHA-256: 7186b9f20e67c5a6e8b3bdd0ae92fcfb71193e5a3c08ee526540a2c7f8e80d0f
font_01_sfnt_off0000e9c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C1 10484 bytes
SHA-256: 48446e55c1b613927c2fc04dcdbff6a5bf0e38c6395371eb1fc8684380e92e0a